tag:blogger.com,1999:blog-61662085558264857542024-03-13T06:20:37.260-07:00KajakzeilerThis blog is meant to promote (sea)kayak sailing in its purest form without any aids such as outriggers, amas, daggerboards, leeboards and such.
Photo: Marianne, one mile off the Frisian coast, lake IJsselmeer, the Netherlands. Kayak: P&H Capella, high volume. Sail: homemade, inspired by Flat Earth/Sea Dog sails. With a stand-alone mast.Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.comBlogger44125tag:blogger.com,1999:blog-6166208555826485754.post-3437152997838562562022-12-07T12:14:00.002-08:002022-12-07T12:14:51.088-08:00Three sails for all weather<p><span> Finally I have three different sails for all weather. No pictures yet, I'm sorry. I will post some as soon as I can. All sails have their own carbon fiber mast with no shrouds. Only a single uphaul line. These stand alone masts fit nicely in a slot I made in the deck of my P&H Capella seakayak as discribed in some earlier posts. The sails are:</span></p><p><span>1) A Falcon 1m2 sail for light to moderate winds</span></p><p><span>2) A homemade sail madeout of super light kite cloth with two battens for moderate to stiff winds</span></p><p><span>3) An old worn down Flat Earth sail that can take very, very strong winds.</span></p><p><span>Why not just one sail that can be furled around the mast in case of increasing winds? Well, I have tried to make a furling system but it kept jamming in the mast slot while trying to pull the furling line. The mast just causes too much friction for easy turning. Besides, the old Flat Earth has a sewn-in boom so it won't furl at all. The other two sails are also attached to the boom by a clew line. You can't furl a boom, right?</span></p><p><span>I purchased three carbon masts for each sail rather than changing sails on the same mast. All sails have different heights so they deserve their own mast length. The only disadvantage is that I need to estimate the windforce before leaving shore. When in doubt I could pick the very forgiving Flat Earth that is slightly slower but will almost never cause a capsize. I survived windforce 8 till now on a small lake, which is why this sail is a bit worn and out of shape.</span></p><p><span> </span></p><p><span style="font-size: large;"><br /></span></p><p><span style="font-size: large;"><br /></span></p>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com1tag:blogger.com,1999:blog-6166208555826485754.post-24326169087676301292022-03-24T14:08:00.004-07:002023-02-19T00:23:43.532-08:00Prejudices<br />
<span face=""arial" , "helvetica" , sans-serif"><div>There are plenty of prejudices about sailing with a kayak. Most are very, very, very persistent. Especially among older canoeists. The cause is the first generation of sailing canoes from roughly the 1930s. Clumsy things that mostly resembled a classic sailboat, complete with gaff, jib and even leeboards. The sailing Klepper - a foldable canoe made of canvas - is still etched in the memory of many.</div><div>The idea that sailing a kayak is a bit crazy seems to be inherited. For example, I recently paddled right past an older acquaintance in a Canadian canoe. I was sailing on a cutting edge close reach right passed him thinking he would be impressed. As I glided past him, I heard him say: 'Yeah, nice, such a sail. Downwind only I guess.' Holy crap! Recently, I had my sail kayak on display at my club when an older member spontaneously said, "Yeah, it looks like a yacht."</div><div>I feel less and less inclined to fight the prejudices. To seal this, I'll list a few more here. Then I'll call it a day.</div><div><br /></div><div><br /></div><div><b>•'If I want to sail, I'll buy a sailboat!'</b></div><div>The fun of paddle sailing is that you still need your paddle to steer, support and sometimes paddle along to go even faster. Paddle sailing is pure kayaking as you are used to, but with a completely different feeling and of course a lot of extra propulsion. With the sail you always have something fun to do, to catch up with that one wave and surf over and to rely on when you get tired. I think a normal sailboat is a lot more boring </div></span><div><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div><br /><div>
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<tr><td class="tr-caption" style="text-align: center;">Flat Earth-zeil with me paddlesailing, Waddensea, the Netherlands</td></tr>
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<ul><div><b>'A kayak is not a sailboat.'</b></div><div>A kayak is an excellent sailboat in spite of having to use a paddle frequently. Because of its gigantic length - compared to its narrow width - a kayak has the same drift as a dinghy with a daggerboard or leeboard. So little, just like other sailboats. Ever tried towing a kayak that's sideways? Almost impossible.</div><div>A kayak with a deep V-shape is even better but a nearly flat bottom kayak will do almost just as fine. What certainly helps against drifting sideways is forward speed. As soon as you pck up wind and speed, the tracking will be a lot better.</div><div><br /></div><div><b>'You are bound to flip in a strong wind.'</b></div><div>I won't say you can never flip. But it rarely happens. Paddle sails offer a little more stability, at least in big waves, thanks to the pressure in the sail and the simultaneous leaning of the paddle sailer. A Flat Earth sail from Australia is made for trips across the Tasmanian Sea and very forgiving. Due to the cut of the sail, excess wind quickly blows away along the top. A sail from Falcon Sails from America catches the wind better thanks to a clear aircraft profile and therefore producing a little more speed. The downside is that it's less forgiving, especially with very gusty beam winds. Then it is important not to pull the sail too tight. I have used both sails. The Flat Earth feels like an model T-Ford, the Falcon sails like a Maserati. </div><div><br /></div></ul>
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<tr><td class="tr-caption" style="text-align: center;">A Falcon-sail.</td></tr>
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<div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><b>•'It causes a lot of hassle on deck.'</b></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">A flat stowed kayaksail is no more cluttered than, for example, two spare paddles on deck. Or stuff on your deck in front of the cockpit. This prejudice is similar to 'I don't want a car because then you have to find a parking space' or 'I don't want a partner because then you have even more stuff in the house.'</div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br /></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><b>•'The sail gets in the way when paddling.'</b></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">This would only be possible for upwind courses (tacking against the wind) when the sail is sheeted in, almost parallel to the keel line. And only if your forward strokes resembles a K1 kayaker: maximum shoulder rotation, paddle far forward and held high. At such an occasion you can simply paddle a little lower. Paddling with a good sail and a favorable wind puts less pressure on the paddle blade, arms and shoulders.</div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br /></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><b>'You can't roll with a sail.'</b></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">If you can roll, you can do that with a sail. </div></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br /></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">
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<iframe allowfullscreen="" class="YOUTUBE-iframe-video" data-thumbnail-src="https://i.ytimg.com/vi/a8ANYekiqws/0.jpg" frameborder="0" height="266" src="https://www.youtube.com/embed/a8ANYekiqws?feature=player_embedded" width="320"></iframe></div>
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<span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">Here are two options: before initiating the roll, first remove the sheet line from its cleat. This will allow the sail to move freely under water like a weathervane. The other sheet - uphaul line - holds the mast, if you pull it loose, the complete rig will move with your roll offering no resistance (see video above). When you get fully upright again, the entire rig and sail lays flat on the water. The second option is to slowly rise to the surface with your paddle blade while sculling. When you reach the surface, flip back up like making a high support.</div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br /></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><b>• 'It's down wind only.'</b></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">The most persistent prejudice, still stemmand from earlier times when canoe sails indeed could not go upwind. Such sails are still there, for example the forked sail (Pacific Action) and the windbag called Wind Paddle.</div></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br /></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;">
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<tr><td class="tr-caption" style="text-align: center;">Forked sail Pacific Action</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpJzR4o1RmAt8h8hknHbY55M9-lTv1kk4DEF3BRGiPwH-jV4ITu9jJ2rF2fFVtPH2eL5mZnWsU8k9ZmItnn5FTwIvabyC-4JcGRQA4jPcqJk1wqsOuM-A28gtj9VyjXNHS9wjumcDPFc5J/s1600/voorlopers3.jpg" style="-webkit-text-stroke-width: 0px; background-color: transparent; color: #0066cc; font-family: "Times New Roman"; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-left: auto; margin-right: auto; orphans: 2; text-align: center; text-decoration: underline; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"><img border="0" data-original-height="192" data-original-width="262" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpJzR4o1RmAt8h8hknHbY55M9-lTv1kk4DEF3BRGiPwH-jV4ITu9jJ2rF2fFVtPH2eL5mZnWsU8k9ZmItnn5FTwIvabyC-4JcGRQA4jPcqJk1wqsOuM-A28gtj9VyjXNHS9wjumcDPFc5J/s1600/voorlopers3.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pop-up sail 'Wind Paddle' </td></tr>
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<span face=""arial" , "helvetica" , sans-serif"><br /></span><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif">These sails are only suitable for followig winds and very occasionally from the side. Nothing more. In my opinion there are three serious sails on the market for upwind sailing that are safe, manageable and create a real fusion between the kayak and the sail. And those are Falcon Sails, Flat Earth sails and Sea Dog sails (which are very similar to Flat Earth). The Falcon sail can reach up to 35 degrees off the wind, Flat Earth reaches a maximum of 40 degrees. I have no experience with the Sea Dog. All three are extremely refined in all their simplicity. And can do much more on large water and in strong winds. The Flat Earth sail in particular is very forgiving in high winds. With the Falcon sail you will feel a little more heeling force in strong wind gusts, like being in a tippy kayak. The advantage is that the Falcon sail is slightly faster, even more so in light winds. </span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><br /></span><span face=""arial" , "helvetica" , sans-serif"><br /></span>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiiltVze0lnBvyqeIuDQDH38NZ-avDhkFJT0vifp6BLLGa6iq7Tj6JNc4S_tniNkMyeCsshSZNAPQia942F8jVPbCeAmbLB0pJHN1xgKHyBB9X4GIUHozgBbMimUYn0SMnnWPXQEpRcpx6V/s1600/JOEWILDLIFE-250317-094626.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="720" data-original-width="960" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiiltVze0lnBvyqeIuDQDH38NZ-avDhkFJT0vifp6BLLGa6iq7Tj6JNc4S_tniNkMyeCsshSZNAPQia942F8jVPbCeAmbLB0pJHN1xgKHyBB9X4GIUHozgBbMimUYn0SMnnWPXQEpRcpx6V/s400/JOEWILDLIFE-250317-094626.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Falcon Sail with a classical airplane wing shape (only visible when seen from the front or rear).</td></tr>
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<div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><span face=""arial" , "helvetica" , sans-serif">Incidentally, when reaching very close to the wind, you have to paddle along. The aircraftwing profile of a good sail only works optimally if you add some extra speed. The wind then skims past the sail faster than the actual wind speed, as experienced by me and by the Scottish paddle sailor virtuoso Douglas Wilcox </span></div><div style="mso-char-wrap: 1; mso-kinsoku-overflow: 1; mso-line-spacing: "100 20 0"; mso-margin-left-alt: 216;"><br />
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<tr><td class="tr-caption" style="text-align: center;">Douglas Wilcox, using his Flat Earth-zeil</td></tr>
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<div><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div><span face=""arial" , "helvetica" , sans-serif"><div><b>•'Nice toys.'</b></div><div>The most frequently heard prejudice. I lived and sailed for twelve years on a large historic motor freighter. Sometimes I came across kayakers and thought 'nice toys' too. When one of them pushed through the lock, I sometimes called out from my high wheelhouse: 'Go away, with your Tupperwear.' Only much later, after I had shaken off the leaden burden of a large ship, did I become a member of my kayak club Never Dry in Rotterdam, the Netherlands, and a whole new world opened up for me. A kayak is a fascinating vessel, wobbly and at the same time more seaworthy than any inland vessel, and most appealing to a sense of freedom and simplicity through its speed, silence and easy transport by road. A sailing kayak has all that and more. It is not without reason that the first serious paddle sailors came from Australia. There, on the raging Tasmanian Sea, the first models of Flat Earth-like sails were tried out in the 1970s. Nowadays, a good sail is part of the standard safety equipment for sea trips in Australia. If you don't have a good sail, you can't come along. Definitely not a 'toy'. But quite 'nice'. </div></span></div><div><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div> </div>
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<b></b><i></i><u></u><sub></sub><sup></sup><strike></strike><span face=""arial" , "helvetica" , sans-serif"></span></div></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com5tag:blogger.com,1999:blog-6166208555826485754.post-39550863739245512262021-05-05T11:50:00.002-07:002021-10-15T07:28:46.372-07:00Kayak sailing so much fun!If you are a decent kayak paddler, you can be an excellent paddlesailor in no time. That is, a kayak sailor without daggerboards, outriggers or even a rudder. A (sea)kayak doesn't need all that to stay on track.<br />
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Kayaksailors in its purest form can paddlesail any course, even upwind, except straight against the wind. Or yes, you can but than you must tack some 40 degrees off the wind and zigzag your way forward just like any sailingvessel. However, tacking up wind brings you to point B in about the same time your kayakbuddies will arrive there when just paddling straight into the wind. But kayaksailing upwind on a long track (without tacking) will defenitly push you more ahead comparing to your buddies with no sail. Though you still need to padde along a bit on that course.<br />
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This blog deals with all aspects of kayak sailing, made possible by only three serious kayak sails: Flat Earth Kayak Sails (FEKS), Falcon Kayak Sails and Sea Dog Sails (a clone of FEKS) from Australia. <div>I have absolutely no commercial interest in them. I'm just a happy customer and admire all three types of sails. They are 100 percent made for kayaks on rough, open waters, as you will see in the many movieclips on this blog.<br />The first ten posts or so are in English, the rest in Dutch. If you hit the translation button on the right bar, you will understand most of it in spite of the bewildering grammar and linguistic lingo.<br />
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Have fun and please leave a message from whichever country you are as a support for my effort.<br />
<br />
Thank you,<br />
Berend Schilder,<br />
the Netherlands<br />
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<br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-15813718757718942832021-04-08T07:32:00.005-07:002021-05-03T07:21:45.179-07:00Some profound paddlesailing!<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhtCV3ko5Q6OOudlU_zmNUqdHAKHbcWZ16U4eM6g_8y5VTyhIBF0QKNRZY593_rknE6AXDsQbup2bWk-QsERRtEYxRSIUflfJFVErb75LvzOqSeuZ2lqgqtCbY7iA9v-ghuENZlWRKapRYj/s2048/Peddelzeilen+Eriemeer.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="904" height="503" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhtCV3ko5Q6OOudlU_zmNUqdHAKHbcWZ16U4eM6g_8y5VTyhIBF0QKNRZY593_rknE6AXDsQbup2bWk-QsERRtEYxRSIUflfJFVErb75LvzOqSeuZ2lqgqtCbY7iA9v-ghuENZlWRKapRYj/w287-h503/Peddelzeilen+Eriemeer.jpg" width="287" /></a></div><br /><p><br /></p><p>A mighty trip with four kayaks on Lake Erie in the USA, all equipped with a Falcon sail. Seen from the aft of Patrick Forresters kayak, the owner of Falcon Sails. It's not an easy trip. Another kayaker is fiddling with his sail, so the others have to stand by for a while. Fortunately, they all have a waterproof VHF. </p><p>Then they all continue in a strong wind and quite some waves in an endless journey. This recording lasts more than half an hour and shows exactly what it is like to paddlesail on open waters. Most courses are on a beam wind, occasionally just downwind. At the end, Forrester deliberately jibes a few times by swinging his hips. A jibe is often inevitable if you want to steer with the wind in your back to the side where your sail is standing. If you do nothing, the wind will automatically creep up behind the sail while steering, causing the sail to turn over to the other side at once. With a hip swing you can provoke this a little earlier in a more controlled fashion. </p><p>Watch this movie on your laptop on a big screen and enjoy.</p><div><a href="https://youtu.be/vHxhgqUzp1E">Peddelzeilen op Lake Erie</a> </div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-86777002991371296952021-04-03T13:57:00.054-07:002021-05-07T12:04:56.736-07:00My homemade sail<p> </p><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto;"><tbody><tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqw1pZRqd9rMJSE2qvPQtI1ZdHGQZ37zKBqoJjJMRXb0h8RYRu-CxJ7s6GJIRQxoKNtLhf3bjbxKWkNTgvKOBk-EdHQ0eeGGXU7pHu3t_HywaCJEXv-oA0R2oAFkkzydSFQ34S-nqVSjt3/s1600/Nieuwe+zeiltje+IJsselmeer+bij+Makkum-Workum+3+april+2021.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqw1pZRqd9rMJSE2qvPQtI1ZdHGQZ37zKBqoJjJMRXb0h8RYRu-CxJ7s6GJIRQxoKNtLhf3bjbxKWkNTgvKOBk-EdHQ0eeGGXU7pHu3t_HywaCJEXv-oA0R2oAFkkzydSFQ34S-nqVSjt3/w400-h300/Nieuwe+zeiltje+IJsselmeer+bij+Makkum-Workum+3+april+2021.jpg" width="400" /></a></td></tr><tr><td class="tr-caption" style="text-align: center;"><b>Photo: Marianne R.</b></td></tr></tbody></table><br /><p></p><p><br /></p><p>The first test of my new homemade sail. Saturday, April 3, 2021, on the IJsselmeer (the Netherlands), on the way from Makkum to Workum. Wind force a big 4, north-northwest. The sail worked fine. I was mainly using my paddleblade as a rudder and hitting the brakes to stay close to the group, barely paddling. My fellow kayakkers had to work a little harder but also had fun on the surf. Measurements taken by a fellow navigator showed us we achieved an average of 12 km/h on large sections. Some other day I will test my sail on an upwind course, hopefully as close as 35 degrees off the wind. </p><p>It was a beautiful trip, despite the cold, with a sleeping bag that was too thin at the campsite. Further details about the sail are in the post below.</p><div><br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com1tag:blogger.com,1999:blog-6166208555826485754.post-22871120108739398652021-03-14T12:13:00.022-07:002022-03-27T02:47:11.413-07:00Showing off my DIY sail<p></p><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjaeC7cNxqjoi-JO8FLI8xClrbrSp3ovLQf20StMLpvLx27u1IsPv_vAXilZEeKeLluCVtBhJqaN-0bNUxOr7WjPphfR-xJ9T0_5pN6H1KMzgW5dTNXPfbH9rE5iPM1mDOv1KhigRPbpZwM/s2016/zeiltje+veraf.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2016" data-original-width="1512" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjaeC7cNxqjoi-JO8FLI8xClrbrSp3ovLQf20StMLpvLx27u1IsPv_vAXilZEeKeLluCVtBhJqaN-0bNUxOr7WjPphfR-xJ9T0_5pN6H1KMzgW5dTNXPfbH9rE5iPM1mDOv1KhigRPbpZwM/w300-h400/zeiltje+veraf.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqdAAPuk4kJiIuD9WH17U2VhOnmTV6l8gwe-dxor5jpB0knEKLxpp-UNcVX7oSZel13zx0J5Ltd8UIaW7QzShuH0phvkgY45Jad381Y9Q022dWLP88dNiobAyVpNsMXkNHB5g2EROGrokk/s2016/Zeiltje+up+close.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2016" data-original-width="1512" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqdAAPuk4kJiIuD9WH17U2VhOnmTV6l8gwe-dxor5jpB0knEKLxpp-UNcVX7oSZel13zx0J5Ltd8UIaW7QzShuH0phvkgY45Jad381Y9Q022dWLP88dNiobAyVpNsMXkNHB5g2EROGrokk/w300-h400/Zeiltje+up+close.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnUd9tK-tHVTTIzbWhvNmjseLYTAaaaEaB8pLrWYcodynnyE0vIb3oOxKG-QE9k4beVT2Jwnw6j0lyZ9LmGfOJmZnxfahdu2AKWhFj2-QlrS4R0HNQacFlWKP2XhWs2SC37yZL7Eliq8xE/s2016/zeiltje+opzij.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2016" data-original-width="1512" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnUd9tK-tHVTTIzbWhvNmjseLYTAaaaEaB8pLrWYcodynnyE0vIb3oOxKG-QE9k4beVT2Jwnw6j0lyZ9LmGfOJmZnxfahdu2AKWhFj2-QlrS4R0HNQacFlWKP2XhWs2SC37yZL7Eliq8xE/w300-h400/zeiltje+opzij.jpg" width="300" /></a></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><p class="MsoNormal">Voila, my own homemade
sail has just been finished. Based on a kind of Flat Earth Foot Loose. But more
like Flat Earth's copy, the Sea Dog sail. Also a footloose, so without a flap
under the boom and loosely fitted between the mast and the tip of the boom. <o:p></o:p></p>
<p class="MsoNormal">It was a tedious job
putting it together, for which many thanks to my wife who really learned the sewing craft.The twin batten sail
is not flat, but has a certain curvature. Maybe a little too much. For the
connoisseurs:</p><p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal">Bottom panel: camber
10 cm, draft position 25% from the mast (panel 0.95 m long)<o:p></o:p></p>
<p class="MsoNormal">Second panel: camber
10 cm, draft position 25% (panel 0.90 m long))<o:p></o:p></p>
<p class="MsoNormal">Third panel: camber 5 cm,
draft position 15 %</p><p class="MsoNormal">Fourth panel: no camber, no draft. </p><p class="MsoNormal">I would give my next sail a little less camber. It feels as if the battens create enough camber already. Also I am not yet satisfied with the tension of the two battens. They are former sail
battens from an old windsurf sail. These battens may not be rigid enough.</p><p class="MsoNormal">The first test on the Kralingse Plas in my hometown Rotterdam was very promising. But due to the trees and changing wind direction I could not really judge how close the sail could get upwind. I reached 35 degrees, sometimes 40 degrees, probably because of the constantly changing wind direction. The heeling force seemed to be between that of a Falcon sail and a Flat Earth sail. At Easter, the real test follows during a tour on the large open IJsselmeer. That's where the more consistent winds rule. </p><p class="MsoNormal"><br /></p><p class="MsoNormal">See also my previous posts about <link> 'Tinkering with sails yourself.' </p><div><br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-74997244331303934532020-11-06T12:53:00.033-08:002022-03-05T07:01:43.559-08:00The final stand-alone mast system!<p> Finally the one and only best way to lower your mast has been developed. By me 😀. It's an almost stand alone mast with no shrouds, except ofcourse one uphaul line. It all looks very neat, although the sail is on old stretched out Flat Earth-sail that can easily be replaced by a Falcon-sail or whatever. I normally use this Flat Earth for very strong winds because it has the least heeling force. Also the least propulsion but in stormy conditions that's just fine. </p><p><br /></p><p><span style="font-size: medium;"><a href="https://www.youtube.com/watch?v=nj6v0xn6a10">Stand alone mast</a></span><br /></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiE5si70c5ntemBLRSqRFESe3EJ6w1FhLH7YfxAoo2nQ_MwV2TC_coIJCCZ_yJyeUio7SMNshY6cifGjGnT1_bffOby_e-TuPqEeXkhZs5PkMzSEsGi-lG2fAczDhbeDGK9R9fz9BCf_18R/s1920/Stand+alone+still.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1920" data-original-width="1080" height="370" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiE5si70c5ntemBLRSqRFESe3EJ6w1FhLH7YfxAoo2nQ_MwV2TC_coIJCCZ_yJyeUio7SMNshY6cifGjGnT1_bffOby_e-TuPqEeXkhZs5PkMzSEsGi-lG2fAczDhbeDGK9R9fz9BCf_18R/w242-h370/Stand+alone+still.jpg" width="242" /></a></div><br /><p><br /></p><p> </p><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;">This is how it looks in a basic drawing: </span></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto;"><tbody><tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpP7n_YkIFyxOUSuZvhfSrdL0Di7XvvND7lnS3pFD0J6XsyUw4qK2ZRPjCbkVO4PjQbKdvQkl6dbDW3MzSzrLAyXcIUrZqA28G8mNnYVZ6rP2yw1XCJqee3xqOfrBsClZ_IG9ktPgIkCid/s1284/Definitief+strijksysteem.png" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="992" data-original-width="1284" height="332" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhpP7n_YkIFyxOUSuZvhfSrdL0Di7XvvND7lnS3pFD0J6XsyUw4qK2ZRPjCbkVO4PjQbKdvQkl6dbDW3MzSzrLAyXcIUrZqA28G8mNnYVZ6rP2yw1XCJqee3xqOfrBsClZ_IG9ktPgIkCid/w512-h332/Definitief+strijksysteem.png" width="512" /></a></td></tr><tr><td class="tr-caption" style="text-align: center;"><br /></td></tr></tbody></table><div><a href="https://www.youtube.com/watch?v=GQ3SPY-3Q1U"><br /><br /></a></div><div><br /></div><div>This mast pivots in an inverted sort of skeg box that resembles a quarter pizza box. This so-called stand-alone mast has no stays, except for the forestay to raise and lower the mast. A small but strong Dyneema line around the mast, attached to very strong points on the deck, prevents the mast from dropping forward when heading downwind. This short line also keeps the mast in check when lowered.</div><div><b><br /></b></div><div><b><a href="https://www.youtube.com/watch?v=GQ3SPY-3Q1U">Demonstration of mast and pizzabox</a></b></div><div>The seams have not been sealed yet.</div><div><br /></div><div>Below is the end result. A close up of the plastic covered Dyneema line that keeps the mast upright and prevents it from falling over. The plastic tube and line within keep the mast upright and give enough room to lower the mast. so that you can slide the mast in or completely out while sitting in the cockpit. Very handy to fix something to your sail while on the water. You just pull the mast out from underneath the tube and it can be reached anywhere. Then slide it back, it's done. </div><div>.</div><div><br /></div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6jTU0eD4OAO0xbPmXR5kWXHzZdxq154akvVxnI5RKxEaXzuLCv0_BWqzthJ37grrJ5vLXpxZRkv87RkMEdz6lrNyyrKiL8V6MEHo8r-UQ2qnM2i0WpSZxJGwkdo9bsE1M-BgsNHHZkDnp/s600/Touwtje+stand+alone+mast.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="600" data-original-width="447" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6jTU0eD4OAO0xbPmXR5kWXHzZdxq154akvVxnI5RKxEaXzuLCv0_BWqzthJ37grrJ5vLXpxZRkv87RkMEdz6lrNyyrKiL8V6MEHo8r-UQ2qnM2i0WpSZxJGwkdo9bsE1M-BgsNHHZkDnp/w477-h640/Touwtje+stand+alone+mast.jpg" width="477" /></a></div><br /><div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><div><br /></div></div><div><div><b>Cons:</b></div><div>- Lots of work to install</div><div>- Rolling can only be done by releasing the sheet from its cleat, not by releasing the forstay (the mast will not fall sideways). Sculling up slowly followed by a high brace is the only option, unless you can roll very well (even with a mast that is still upright and a sail trailing through the water).</div><div>- The pizzabox takes up some space in the front compartment. You can only slide long, narrow objects along it, Such as a bag of tent poles.</div><div><br /></div><div><b>Benefits:</b></div><div>- It looks very neat!</div><div>- No dangling lines on deck or along the sides of the kayak when the mast is stowed away on deck, so less chance of snagging.</div><div>- When down, the mast with folded sail can easily be pushed forward beyond the cockpit. So even more free space to paddle. You can therefore also use a longer mast with a DIY sail. </div><div>- If necessary, the lowered mast can be fully pulled towards you to repair something from the cockpit. Then stick it back underneath the plastic tube and raise the mast again. The three dubble weaving of the small line back and forth through the strong deckrings plus the installment of the plastic tube ensures that it will automatically form an arch. So the mast will always slide through without bumping onto the tube. </div><div style="font-weight: bold;"><br /></div></div><div><b><br /></b></div><div><b>The standard system</b></div><div>Of course there is also the standard system of Flat Earth, Falcon and Sea Dog with a flexible tiller foot on the deck and rigging with many stays. The disadvantage is the limp rigging that dangles along your boat when lowered. Or the rigging that gets in the way during rescue operations. All these lines are a messy sight as well.</div><div><br /></div><div><br /></div><div><br /></div><div><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto;"><tbody><tr><td style="text-align: center;"><img border="0" data-original-height="2048" data-original-width="1536" height="500" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgV1DoDlfFz0IzJvbLQiCYfdoZpEPkUgZH-BbLFJ-Mjdy1HtReY3zPFSOyt8zisQjkIhKel6jSpKqY4tcrIM4JyyWxbtgqRVZkA0Uhx_ebpdoZp3s_8WzleEe1hncCeJVoD4tGtCQo-U7Rp/w375-h500/Verstagingen.jpg" style="margin-left: auto; margin-right: auto;" width="375" /></td></tr><tr><td class="tr-caption" style="text-align: center;">The well known system of Flat Earth with the tiller mastbase and all shrouds. <br /><br /></td></tr></tbody></table></div><div><br /></div><div><br /></div><div>So for a long time I was looking for an even simpler system without sidestays or even backstays, with a so-called stand alone mast. </div><div>First I devised a pipe through the deck and fixed it to the keel with a block of epoxy. I soon found out that it's almost impossible to position the mast with sail flapping around while sitting in the cockpit on some waves right above the pipe opening to let it slide in. I made a sort of gutter/ chute at the opening of the pipe to make sure the mast wouldn't pop out of the opening while pulling on the forstay, but alas, the mast just stood upright but wouldn't slide down the pipe most of the time. Instead it would fall sideways of forward within seconds. The next problem was lifting the whole darn thing upward in order to lower the mast. Oh Lord, help me!</div><div><br /></div><div>That's why I tore the whole thing out again and thought of a much better plan. I now have made a wooden type of skegbox in the shape of a quarter circle (think of a quarter pizzabox) with the opening facing up through the deck.</div><div><br /></div><div><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto;"><tbody><tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpV7v5rg8_M-PGQXnXgXMMXq2FtEnsmsoa3_Jt4NsmRDICJP0lBeKnf_scsaRfPjFzCDKezM0ODkHj_b-Oi8XwOQQNNBLoO8TLb3FiCU2gjjbEEll0amdJwfu580bGQ27_3GoID06NI1dv/s2048/doos+in+wording.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="2048" data-original-width="1536" height="500" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpV7v5rg8_M-PGQXnXgXMMXq2FtEnsmsoa3_Jt4NsmRDICJP0lBeKnf_scsaRfPjFzCDKezM0ODkHj_b-Oi8XwOQQNNBLoO8TLb3FiCU2gjjbEEll0amdJwfu580bGQ27_3GoID06NI1dv/w375-h500/doos+in+wording.jpg" width="375" /></a></td></tr><tr><td class="tr-caption" style="text-align: center;">The quarter 'pizzabox' in progress. Made of steam bent plywood and laminated with polyester and expoxy. The opening will surface flush through the deck.<br /></td></tr></tbody></table><br /><p><br /></p><p>So in the deck there is a slot in which the mast can turn up and down. A single forestay is required to raise and lower the mast. And to keep the mast upright in the box while paddlesailing, especially on a down wind course. </p><p>The hinge for the mast consists of a strong but thin Dynema line that runs through two flat D-ring mounted on the deck and runs forward around the mast to hold it up. This line prevents the mast from falling forward and also keeps the mast in place when lowered. A normal steel hinge with hard protruding parts is out of the question because rescuers doing an X rescue would scratch their own deck on such a chunk of steel. </p><p>Placing the box is no sinecure. The bottom of the box is again cast in epoxy - just like the pipe - for which a container is first made of two plywood partitions that fit on the keel and a few inches upward against the sides of the kayak. This will act as a container to poor in the epoxy. Don't forget to apply some bubbling glue along the seams or duct tape, otherwise the epoxy will oose out. The box is then laminated to the slot in the deck. All in all, this cannot be done from the manhole. It's too far back to reach the whole work of art. That's why I cut out quite a bit of the deck with a grinder. Than I laminatd the box on the bottomside of the deckpiece and placed the entire construction back in place with the bottom part of the pizzabox sinking into the container filled with epoxy. </p><p><br /></p><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto;"><tbody><tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY3p_nws_2qXVlnMF6cCIfGzT75MaHPy1DWOT2MGfilO67sTw_zKA4gRN0wAv18vKRUoDnYuHAArUuBnPecmYEH1Hk6c-CXVK1C2dXlwbh50_GwkCvY3WHvVRZ9jwf7YrsFFS5AS64b8tY/s2048/gat+in+dek.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="2048" data-original-width="1536" height="625" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY3p_nws_2qXVlnMF6cCIfGzT75MaHPy1DWOT2MGfilO67sTw_zKA4gRN0wAv18vKRUoDnYuHAArUuBnPecmYEH1Hk6c-CXVK1C2dXlwbh50_GwkCvY3WHvVRZ9jwf7YrsFFS5AS64b8tY/w469-h625/gat+in+dek.jpg" width="469" /></a></td></tr><tr><td class="tr-caption" style="text-align: center;">This hole looks bigger the in reality because of the optical illusion caused by the camera lens. The old base of the pipe is still visible. I grinded and chiseled it out later on to make room for the pizzabox. <br /></td></tr></tbody></table><p>Finally I closed the seams around the deckpiece with polyester and epoxy and sanded it flush. This can be done from the manhole. I didn't apply any topcoat. You never, ever get the colour right. Besides, all the seams were to be covered with keelstrip. ,This gives the whole construction a steardy 'designed' appearance. As if the kayak manufacturer built the boat this way.</p><p>My 'invention' isn't entirely new. In fact, this system is as old as Methuselah. Copied from the old Dutch tjalks and clippers that often had a stepped mast to the bottom, although with additional stays. When lowering, the bottom of the mast turned through the deck. This bottompart had a counterweight so that the skipper could lower and raise the mast with one fingertip. The slot through the deck was sealed with a cover plate wedged in place. In my case, I just leave the slot open. Less than half a liter of water goes into the pizzabox.</p><p>Of course, this system is impossible for the novice kayak sailor who buys a ready-made set and wants to sail immediately. Yet I firmly believe in the simplicity of an upside-down pizzabox. It saves a lot of junk on deck due to the lack of two sidestays and two backstays. It all looks a lot better. In the future, I hope a manufacturer can make a ready-to-use plastic pizzabox with a flanged rim that extends over the deck. This edge can be glued or bolted. A few wedges in the bottom of the boat will also hold the box down below. That saves a lot of work and you do not have to grind open part of the deck to access it. </p><p>Perhaps this system is worth incorporating into a new kayak model with pre-molded inverted pizzabox in the foredeck. That would be the first kayak that is specially designed for kayak sailing. So not an ordinary kayak that will be tinkered with afterwards. </p><p>A ready made version in plastic could look like this (below), with a flange that fits on any deck, bolted down with rubber kit in between as a sealant. It wouldbe a lot easier than a wooden box carefully laminated to the deck, like I did.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjJHV0e_iI1vI_pRX2Lbq56saptP5TE5UvH8ksLET5S-ue-x8Zmsfx9ldT2gBLxQjkd6mRWr4eBKXaQNJB7K1kSE8_yqrIDc_OjHcDxOOCdSFQEWTLf_TG6yCB7_z2Y4_AMFw10nFBN-BbR2qVAxMUgGnOHzFqDr-C0jIExpYtsuUkvblQ8ScBf8MKCQQ=s1705" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="840" data-original-width="1705" height="371" src="https://blogger.googleusercontent.com/img/a/AVvXsEjJHV0e_iI1vI_pRX2Lbq56saptP5TE5UvH8ksLET5S-ue-x8Zmsfx9ldT2gBLxQjkd6mRWr4eBKXaQNJB7K1kSE8_yqrIDc_OjHcDxOOCdSFQEWTLf_TG6yCB7_z2Y4_AMFw10nFBN-BbR2qVAxMUgGnOHzFqDr-C0jIExpYtsuUkvblQ8ScBf8MKCQQ=w554-h371" width="554" /></a></div><br /><p><br /></p><p><br /></p><p><br /></p></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-44190266996501846172020-04-11T06:40:00.014-07:002021-05-03T07:41:29.613-07:00Additional movieclips of paddle sailing<p>Every now and then I come across nice movieclips of paddle sailing. I collect them, below. The list will grow longer. Preferably open the links with the facebook option. Lots of fun! </p><p> <a href="https://www.facebook.com/100004578781231/videos/1931134827049125/">Tangalooma to Shorncliff</a></p><p><a href="https://www.facebook.com/100004578781231/videos/1931135283715746/">Tangalooma to Shorncliff 2</a><br /></p><p><a href="https://youtu.be/aDdFL6lVEwY">Twee kajaks, twee zeiltjes (catamaran)</a><br /></p><p><br /></p><p><br /></p>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-84342123131786208682020-03-16T06:38:00.004-07:002021-05-05T07:57:35.480-07:00Flat Earth-sails in Scotland, going upwind<div class="separator" style="clear: both; text-align: center;">Flat Earth paddlesailing in Scotland. De first leg is reaching quite high upwind. About 35 degrees I would say. Give or take..</div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: center;">
<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.blogger.com/video.g?token=AD6v5dyzgt4Ps2IQY423ri0G3KyWf8vbOu2zy8sEnTde5yxExeENxloxNXHqySjm3M030c37aEcTi8i1ol4qksYxig' class='b-hbp-video b-uploaded' frameborder='0'></iframe></div>
Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-84414771631866560812020-03-10T08:44:00.004-07:002021-10-19T05:06:35.623-07:00What is paddlesailing or kayak sailing?<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhW3RI-Uc1l3NXTgAEGNTr2pCha1cuy0mZOp-RjuQdYz7p0xqNO5M_dCiHqKETUeDFQJusoZWN3Ph5ZVILEj1ffUCIZmifa-m3M2Wele6pbtcSQOnr7Mffn8rIrgyqS3zlsKkHoXOLE02KN/s1600/Oosterschelde+in+de+golven.png" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="700" data-original-width="1113" height="250" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhW3RI-Uc1l3NXTgAEGNTr2pCha1cuy0mZOp-RjuQdYz7p0xqNO5M_dCiHqKETUeDFQJusoZWN3Ph5ZVILEj1ffUCIZmifa-m3M2Wele6pbtcSQOnr7Mffn8rIrgyqS3zlsKkHoXOLE02KN/s400/Oosterschelde+in+de+golven.png" width="400" /></a></td></tr>
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<span style="font-size: small;">The Oosterschelde estuary, the Netherlands, november 2019. Windforce 4 on a beam. This is my old Flat Earth sail on my Capella seakayak made by British P&H. </span><br /><span style="font-size: x-small;">Photo Mike Griffin </span></div>
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<span style="font-size: x-small;"></span><br /><div>Kayak sailing is a great way to paddle and sail simultaniously, hence the correct name 'paddle sailing'. With the right sail the two activities merge into a whole new fusion. It usually feels like a strong guy sitting on your back deck who is paddling very hard. Kayak sailing is therefore a lot of extra fun and it will not wear you down easily. Another comparison is the feeling of being on a perpetual surf. That one wave is constantly staying with you and pushing you ahead. You may paddle less like on a surf, but you still have to steer with your paddleblade or rudder to stay on course and sometimes enjoy fully fledged paddling because that movement is in the genes of every kayaker. Especially on an upwind course when you need give the sail a little push. Kayak sailing does not mean sitting back and reading a book. Sometimes it is possible, but usually not.</div><div><br /></div><div>Despite the great speeds you can reach paddlesailing and all conceivable courses up to 30 degrees upwind, just like a sailing boat can, a kayak with a modern sail is not yet a sailing boat. It will alway remain a (sea) kayak!</div><div>An experienced sailor who is not good at kayaking does not move around easily in a kayak and certainly not with a kayak under sail. But a good kayaker who knows nothing about sailing will understand how it works in a few minutes and be off happily. In short, the kayak and classic paddle technique remain essential. That is why we also speak of 'paddle sailing'.</div><div><br /></div><div><b>First group</b></div><div>Let me be crystal clear about what shows up on the water as a 'canoe' or kayak type of boat with a 'sail'. The world of skinny hull boats with a sail can be divided into two groups. The (sea) kayak with a small sail is one group. That's what this blog is about. With a seakayak with a small, modern sail you should be able to do everything you are used to with a regular seakayak. Rolling, rescues, waves of two meters high, wind force five / six on the ocean. No problem if you can do that too without a sail.</div><div> </div><div>In my humble opinion there are only two serious, safe sails for sale, the one from Flat Earth for the heavy work because that sail is forgiving and the one from Falcon for the slightly less heavy work (up to windforce 5 I would say) because this sail may be faster but as a trade off also less forgiving. The Falcon is an Arabian thoroughbred, a Maserati. The Flat Earth sail is a thoroughly reliable but slightly slower Sherman tank. The Flat Earth sail is a workhorse, an all-rounder, originally developed by experienced, rather intrepid seakayakers around the Tasman Sea near Australia. Anyone who knows the Tasman Sea knows what that means. Since the nineties these kayakers have worked with heart and soul to perfect their sail with the philosophy that any good kayaker can handle it without the slightest fear of capsizing. </div><div>All other sails (Pacific Action Sail, Windpaddle, etc.) are not suitable for the rough stuff, even worse, cannot face the wind at an angle. These sails are fun for sheltered waters and with a modest tailwind on a summers day.</div><div><br /></div><div><b>Second group</b></div><div>The second group consists of Canadian canoes or other wide open less skinny boats with outriggers, leeboards, enlarged attached rudders and God-knows-what-more. With these vessels it is possible to rig much larger sails. This is already starting to look more like sailing boats. The paddling has faded into the background (except in a Canadian canoe with outriggers far aft or forward, I think). Those unfamiliar with sailing are advised to first take a sailing course, yet another indication that it is more about sailing than kayaking. That is not necessary with a modern (sea)kayak fitted with a small modern sail specially designed for paddlesailing. Those who cannot sail but can kayak well, will understand how it works within two minutes.</div><div>Furthermore, the rig on a wide Canadian canoe is three times as heavy and bulky and three times as expensive (around 1300 euros) and it takes at least ten minutes to assemble the sail with accessories or to store it with all kinds of loose parts for which matching sheaths and special carts are needed. This building up and dismantling has to be done on land, once on the unexpectedly rough water you can no longer do anything. A capsize seems dramatic to me because rolling back up with outriggers and a large sail is impossible. Admittedly, it is easy with outriggers to get back into the boat once it is upright again. But with a Canadian under sail of about eight square meters, the disaster is incalculable. A sea trip is therefore out of the question unless you have the rock-hard guarantee from our maker personally that it will remain under force four wind all day long. With such wide kayaks or Canadian canoes a suddenly increasing wind on large open water is therefore life-threatening because at that moment the sail can no longer be stowed away or not even reefed quickly in a safe way.</div><div>A modern sail of Flat Earth or Falcon is precisely designed to do just that. Within one seconds it lies flat and five seconds later folded neatly together, secured under the bungee. Rolling with such a nifty sail is also possible for those who can already roll with a kayak without a sail.</div><div>But fair is fair, such a super tanker under sail with leeboards and outrigger is a lot of fun on the lakes with fair weather. Moreover, in a Canadian canoe you can take a lot more gear and baggage with you which is great during camping. More information can be found on the excellent website <a href="http://www.kanozeilen.nl/">kanozeilen.nl</a> I'm sorry, it's in Dutch but you can use google translate if you don't mind the bewildering vocabulairy and grammar.</div><div><br /></div><div>So in short, if you really want to keep a feel for kajaking and want to make long crossings across open seas it is better to opt for a Flat Earth (or its clones Sea Dog Sails from Australia and Nortik Sails from Germany) or a Falcon sail from Ohio, US which is more powerful but in return requires more leaning and solid paddle braces in winds above force 4.</div><div><div><br /></div><div>Paddle sailing with a modern sail is defenitely a real fusion of kayaking and sailing. The other vessels and their rigs are more a transformation towards a summer sailing boat. Just so you know before you make a choice. </div></div><div><br /></div><div><br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com8tag:blogger.com,1999:blog-6166208555826485754.post-55507032806922252012020-03-09T12:32:00.006-07:002021-12-12T10:12:50.348-08:00Kayak sailing is fantastic!<div style="margin: 0px;"><span face=""arial" , "helvetica" , sans-serif"><p class="MsoNormal">Since about four
years I have a sail on my kayak. Now let me start a blog to share my
experiences with you. Kayak sailing is a fantastic experience, provided you can
already kayak nicely of course. It takes you much further on a day of sailing,
with speeds that can reach up to 15 kilometers per hour and sometimes even
faster. Then I don't count the surf and the tide yet.</p><p class="MsoNormal"><o:p></o:p></p></span></div><div style="margin: 0px;"><span face=""arial" , "helvetica" , sans-serif"><br /></span></div><div style="margin: 0px;"><br />
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<tr><td class="tr-caption" style="text-align: center;"><span face=""arial" , "helvetica" , sans-serif">Holwerd-Ameland, 2018 on the Waddenzee, Holland. I use a Capelle high volume seakayak with a Flat Earth sail.</span></td></tr>
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<div style="margin: 0px;"><span face=""arial" , "helvetica" , sans-serif"><span face=""arial" , "helvetica" , sans-serif"><p class="MsoNormal"><span lang="EN">Kayak sailing is
a hybrid activity with a kayak and a sail. But then really hybrid, so a fusion
between two sports that interlocks in such a way that a new way of sailing
actually arises. They are not two things that coexist, like a regular bicycle
with a battery to also ride electrically. That remains an ordinary bike with
less effort to paddle along. Kayak sailing is therefore not sailing with a
kayak, nor kayaking with a sailboat. Kayak sailing is... kayak sailing!</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN"><br />
<b>More dynamic</b><br />
Kayak sailing on the waves - rather paddle sailing - feels very different from
just paddling on the waves, but also totally different from just sailing. It's
much more dynamic, less monotonous than hours of stiff paddling in a neat,
repetitive stroke. Your movements are
always different.</span><o:p></o:p></p></span></span></div><div style="margin: 0px;"><span face=""arial" , "helvetica" , sans-serif"><span face=""arial" , "helvetica" , sans-serif"><br /></span></span></div><div style="margin: 0px;"><br /></div><div style="margin: 0px;">
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimSqexOhFkuHXfY2x9o7buTwDXvBU9u8hRuKHPW21ysxxxqjMK_wEBeWgD74oXLqivxcF-unCNsm2yhPwfh17nrMJoh_ymsI429FfzexEeCzCoidHBQw0B5T2PkDALYlP7kUNsn8UyidJl/s1600/Oosterschelde+in+de+golven.png" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="700" data-original-width="1113" height="250" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimSqexOhFkuHXfY2x9o7buTwDXvBU9u8hRuKHPW21ysxxxqjMK_wEBeWgD74oXLqivxcF-unCNsm2yhPwfh17nrMJoh_ymsI429FfzexEeCzCoidHBQw0B5T2PkDALYlP7kUNsn8UyidJl/s400/Oosterschelde+in+de+golven.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">Oosterschelde, Holland. November 2019. Force 4 Beaufort on a beam course. My most exciting trip so far. Photo </span><span style="font-size: x-small;">Mike Griffin</span></td></tr>
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<span face=""arial" , "helvetica" , sans-serif"><br /><span lang="EN" style="line-height: 107%;"><span style="font-family: inherit;">Sometimes
you just paddle along easily, if it remains quiet you can eat your sandwich at
8 km / h, then occasionaly you put a backwards paddle rudder at the stern or you have to let the paddle gently drag over the water where the wind comes from, just for support in case. With a
nice breeze from the back you have a good chance that you will catch up with the
waves to surf from instead of looking back every time the next wave is coming.
And who knows, if the wind is on beam or from behind, you can paddlesail against the
tide with a nice pace. Here is a good example of an average trip with a
Falcon sail, with the designer Forrester himself at the paddle loom. The wind is
mainly from the stern, but paddle sailors can also sail diagonally against the
wind, up to about 35 degrees to the wind. Here it comes:</span></span></span></div><div style="margin: 0px;"><span face=""arial" , "helvetica" , sans-serif"><span face="Calibri, sans-serif"><span style="font-size: 14.6667px;"><br /></span></span></span><span face=""arial" , "helvetica" , sans-serif"><a href="https://youtu.be/yctdvkNK7qM">Downwind run</a></span><br />
<span face=""arial" , "helvetica" , sans-serif"><br /></span><span face=""arial" , "helvetica" , sans-serif"></span><b><span face="Calibri, sans-serif" lang="EN" style="line-height: 107%;">Waiting</span></b><span face="Calibri, sans-serif" lang="EN" style="line-height: 107%;"><br />
Such a nice speed provides the positive disadvantage that others in the group
quickly disappear behind the horizon, which is not safe on big open water.<br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;"><br /><br />Again
Oosterschelde November 2019, thanks to dayplanner Jan Vlak. Mainly on a
north-south route, with a beam wind. I'm ahead of everybody, but actually too
far. My paddle is regularly out of the water with windorce 4. Only for balance or to steer I sometimes
paddle along a bit because that just gives a good feeling. In this case, I
quickly decided to step on the brakes. </span><br /><span style="font-size: x-small;"><br />Photo Mike Griffin</span></td></tr>
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<span face=""arial" , "helvetica" , sans-serif"><p class="MsoNormal"><span lang="EN">So I often have
to wait or turn circles around the group. That's why I hope more people will
set a sail. I have already received a few strong criticisms from the group for
sailing too far ahead. My sad record is at 12 kilometers per hour nonstop wind
from Middelharnis to Hellevoetsluis (a route of 8.5 kilometers) with only few
real paddle strokes (summer 2018). I only used the paddle to steer and support
a little. I was there after 45 minutes. I had the most fantastic experience so
far. At first I was a bit tense but when I noticed that it was going fine I
could really enjoy the wind and the waves for the first time. The rest of the
group arrived half an hour later. The comments were pretty negative. Rightly
so, of course. It was very stupid of me. I'll never do it again! <o:p></o:p></span></p>
<span face="Calibri, sans-serif" lang="EN" style="line-height: 107%;">So far I know of two other Dutch people who also paddlesail.
In other countries it is much more popular. I'm not sure why. Or maybe I do,
having an innate tendency to laziness. I do like to kayak but it shouldn't be
too fanatical. You won't find me in a K1 or surfski any time soon. Nature
attracts me more. I like to drift out from time to time and listen to the
silence, to peer down the water in the hope of seeing 'something'. The waves also
attract me, but not so much from a sporting point of view. More because of the
mysterious connection of the waves with the refined kayak. I only go into the
surf to practice, not for the kick. Paddlesailing in shallow waters also mean mast
breakage sooner or later. <br />
<!--[if !supportLineBreakNewLine]--><br /></span></span><p class="MsoNormal"><span lang="EN"><b>Elderly people</b><br />
So it makes sense that I fell for kayak sailing. One can be lazy, look around
and enjoy the dynamics of a kayak on the waves even more without falling behind
the group. Perhaps the interest in kayak sailing in the Netherlands is
disappointing because the average age of kayakers in the Netherlands is quite
high. Elderly people shy away from the ‘crazy stuff’. They’d rather work on
their shape. A sail would distract from that. It's like hooking up an electric
motor onto your kayak. Which, of course, is not the case. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN">Another cause may
be the bulky appearances of old canoes fitted with large sails, daggerboards,
outriggers and Lord knows what. In the last fifteen years, a huge revolution
has taken place in the field of kayak sailing. It started in Australia where
sailors on the Tasman Sea in the eighties needed something simple, extremely
seaworthy and manageable from the cockpit. Without any other contraptions that would be
in the way during rescues, rolling or sculling. The first modern sails were
born there. Nowadays, a good sail is mandatory on many large water trips in
Australia, as is a PDF and other safety equipment. That gives us some thought.
</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="EN">'Buy a
sailboat'</span></b></p><p class="MsoNormal">The most common statement in the Netherlands is unfortunately still: 'If I want
to sail, I buy a sailboat.' But then people forget that kayak sailing is not
just sailing. You always paddle along. Even if you go fast enough on the sail,
everyone tends to use their paddle anyway. Supports, bow strokes, giving
backward paddle rudder and rolling, it is all necessary to be able to kayak
sail. And on track dead against the wind, you are a real kayaker again. </p><p class="MsoNormal"><o:p></o:p></p>
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<b></b><i></i><u></u><sub></sub><sup></sup><strike></strike><span face=""verdana" , sans-serif"></span><span face=""helvetica neue" , "arial" , "helvetica" , sans-serif"></span><span face=""arial" , "helvetica" , sans-serif"></span>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-71390338439398783412020-03-09T08:12:00.013-07:002021-10-15T08:14:29.048-07:00How to choose between a Flat Earth sail or a Falcon sail<div><div>In this blog I will elaborate on the differences between the Flat Earth sail and the Falcon sail. Roughly speaking, Flat Earth is very forgiving and therefore a little slow, but suitable for every paddlesailor in strong wind, up to force 6, if necessary, on large water with waves of roughly one and a half meters. Falcon is faster in all winds, so great for recreational paddlesailors who want a relaxed day out sailing. But in force 5 to 6, the Falcon is a lightning-fast Arabian thoroughbred. Exciting for experienced paddle sailors who need a kick, less recommended for beginners due to the greater heeling forces on a beam course. So it is wise to look honestly into the mirror and ask yourself what kind of paddler you are before making a choice.</div><div><br /></div><div>To get an idea here's a YouTube video of Patrick Forrester, the owner of Falcon Sails. Looks like a downwind force 4 or 5.. The wind seems to blow not as hard, but his own forward speed gives the optical illusion of calm waters. Now and then he shoots sideways to half wind to keep an eye on his fellow sailors. Wow… Is that something for you or rather not? </div></div><div><br />
<a href="https://youtu.be/ysVTtX4H8B0">https://youtu.be/ysVTtX4H8B0</a><br /><br /></div><div>Here's the Flat Earth sail in even a stiffer wind and a little more tricky course on close reaching since the heeling force increases even more. Nevertheless the kayak stays upright, thanks to the sail and the seasoned kayaker. Now that's typical for a Flat Earth sail: relatively smooth paddlesailing in harsh conditions but also not quite as giddy and fast as a Falcon sail. </div><div><br />
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<br />And here's an example of my own Falcon sail in a super light breeze of force 2 or three. Despite the lack of wind, I make a decent speed already. This would not be the case with a Flat Earth sail. I would've had to make a couple of extra paddlestrokes.<br />
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<br /><div>Let's take a look at the differences in the design of the two sails to understand and appreciate the different performances.</div><div><br /></div><div><b>Twist</b></div><div>An important characteristic of a good sail is the degree of twist, or spiral shape. A sail is not a flat piece of cloth, but is slightly twisted. The lowest part of the sail along the boom is not as far out as the top of the sail. This creates a certain spiral shape in the sail. This happens in part by itself because only the bottom with the boom is attached to the sheet, while the top of the sail hangs loose and can therefore turn a little away from the wind. For another part, sailmakers cut the lines of the sewn together sailpanels in such a way that extra twist is added. But why is that spiral shape necessary?</div><div><br /></div><div>Unfortunately, sailors do not have to deal with just one wind direction. At first glance they do. For example, if you are sailing at a beam course with the wind coming in perpendiculair, the wind will be perpendicular to the boat. That is simple. But yes, the boat itself also moves forward. This has a significant effect on the angle of the wind hitting your boat. Suppose you have a wind vane at the top. It will flutter exactly 90 degrees outward when the kayak is stationary. But as the boat picks up speed, the vane will also move a little backward. From the sailors point of view the wind suddenly seems to be coming a little from the front when he looks at the vane or feels the wind on his face. We call this false image the 'apparent wind'. The actual wind, of course, still comes from the far left or right.</div><div>The problem with this is that the beam wind usually blows harder at the top of the sail than at the bottom, where the waves often disturb the wind a bit. The effect of your own forward speed is therefore less at the top, because the hard, unhindered beam wind still predominates there. Down below the effect of the forward speed is somewhat greater because the wind cannot blow freely there. So in your cockpit the wind seems to shift forward as you move along. More than at the top. So .... the sail at the bottom should also be sheeted in a bit more - as if you were paddlesailing a bit upwind. The top stays loose because the true, unblocked wind is still perpendiculair to the kayak And voilá, there is the need for a sail with the right twist to adjust the sail to the two different windangles</div></div><div><br /></div><div><br /></div><div><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTUEcP2znP4AG-UCV9SDn4w4aqnYaSuEJ91xTku6_bKdaW6YsblVGmbNddMk24rAe3ARfX4JjXbTjf9PykSjbackCDwY6E63Bzt9MQzJRDGTb4lNYFsrK1zRYwU0Fi_Uvo2Z0hz44DCtfx/s1600/Twist.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="600" data-original-width="600" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTUEcP2znP4AG-UCV9SDn4w4aqnYaSuEJ91xTku6_bKdaW6YsblVGmbNddMk24rAe3ARfX4JjXbTjf9PykSjbackCDwY6E63Bzt9MQzJRDGTb4lNYFsrK1zRYwU0Fi_Uvo2Z0hz44DCtfx/s400/Twist.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">An almost 150 years old Dutch <i>tjalk </i>with a raised stern. The boom is sheeted in tight while the gaff top swirls out quite a bit, resulting in a clearly visible twist. Photo: Molenaar Sailmakers</span></td></tr>
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<span style="font-size: x-small;"></span><br /><div>Twist is also important for kayak sails, although the difference in wind direction above and below is much smaller. But there's another important reason for twist in a kayaksail. Due to the spiral in the sail some of the wind will turn upwards and disappear over the top. This is called windspill which is very pleasant in strong winds. Thanks to the twist, the heeling force can be limited.</div><div>Flat Earth has based its entire corporate philosophy on this idea. A Flat Earth sail, originally developed on the rough Tasman Sea off Australia, is ideally suited for strong winds. Most of the wind flies up by itself and is then gone. The first models had a lot of twist, later on it was reduced to normal proportions. I believe that the Falcon sail has a little less spiraling-off effect. The sail is a standard triangle with the top fairly close to the mast as opposed to a Flat Earth with battens that keep the sail at the top much further back and therefor easier to turn away from the wind. </div></div><div><br /></div><div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgA6j9VOsgjhQbWqfOUMq26_2sos2s15_sonB8kM-6BtFQcpFO5l5yNUWuZlqIYF3iHl-8UKwHO9OJPWLD_UOiKKvdnXD2S12Eiba8U_aQtUqIV-zmrL8MFYBKwRTITcTB9o1Jko0YRfhEy/s1600/oude+code+zero.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="683" data-original-width="1024" height="266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgA6j9VOsgjhQbWqfOUMq26_2sos2s15_sonB8kM-6BtFQcpFO5l5yNUWuZlqIYF3iHl-8UKwHO9OJPWLD_UOiKKvdnXD2S12Eiba8U_aQtUqIV-zmrL8MFYBKwRTITcTB9o1Jko0YRfhEy/s400/oude+code+zero.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">An old model Flat Earth sail with a mindblowing twist of 21 degrees difference between the top and the boom. The wind is released quckly. </span></td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY3Dq-Lmdc4GTlnpsDQY_IrbjIvHahkx0tJ3sV0Ze4QOn9kIV_8JDENWGApN9zSSDKTJQ_SolMGVUAkf-CyAoohBUllojJCeGlNJnYkP3GnCdM-zaIXLbKXB22vKijbr7CLJalSGXpcCHD/s1600/nieuwe+code+zero.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="711" data-original-width="1024" height="277" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY3Dq-Lmdc4GTlnpsDQY_IrbjIvHahkx0tJ3sV0Ze4QOn9kIV_8JDENWGApN9zSSDKTJQ_SolMGVUAkf-CyAoohBUllojJCeGlNJnYkP3GnCdM-zaIXLbKXB22vKijbr7CLJalSGXpcCHD/s400/nieuwe+code+zero.jpg" width="400" /></a></td></tr>
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<span style="font-size: small;">A newer model Flat Earth with only 12 degrees twist. It holds on to the wind a bit more.</span></div>
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<span style="font-size: small;"><br /></span></div>
</td></tr>
</tbody></table><div>Another notable difference between Flat Earth and Falcon is that the Flat Earth sail has an even curvature when viewed from above. It seems as if the makers have come up with a circle and have taken a piece from it.</div><div>Falcon is much more like an airplane wing (see 'Sailing for dummies'). The deepest point or camber is mainly directly behind the mast and then flares out slightly to the rear. This creates a suction behind the sail that greatly aids in the forward drive. Almost all sails in the world have that aircraft profile.</div><div>Now you may understand the basic philosophy of Falcon Sails. This sail is choosen for power (and quality). Flat Earth has choosen for simplicity and ease of use for beginners. The even curvature in the Flat Earth sail is almost automatically created by the sewn-in flexible sprit that holds out the top of the sail. This keeps the sail low with less heeling force, while still providing a reasonable square surface. The result of a sewn-in batten however, is that the aircraft wing shape is difficult to accomplish. A Flat Earth sail has probably considerably less suction at the back side, I suspect. This also helps in limiting the heeling force. Very nice in strong winds, but less advantageous in lighter winds.</div><div><br /></div><div><b>Rig and price</b></div><div>The rig of the two sails differ quite a bit but the quality is comparible so I don't want to go into this. You should neither. The key question is wether you want speed and/or stability in rough winds. </div><div><br /></div><div>The two sails do not differ much in price. A complete set of Falcon (1 square meter sail plus all accessories) costs $ 545 A slightly larger 1.4 square meter sail with larger rig: $ 575 A separate sail costs $ 145 The larger sail $ 175 - There also seems to be a smaller Falcon sail of 0.7 square meters.</div><div>In my experience it is possible to make your own rig, but not cheaper. And designing and sewing a sail yourself is just as expensive as ordering one, but it is fun to do if you don't dread a lot of work. See my blog 'Make your own sail' for this. As a beginner, I wouldn't venture into it and just buy a sail with the rigging. See also <a href="http://www.falconsails.com/">www.falconsails.com</a></div><div><br /></div><div>A Flat Earth type Trade Wind of 0.8 square meters complete with accessories costs 500 euros, via importer for the Netherlands Axel Schoevers (<a href="http://www.zeekajak.nl/">www.zeekajak.nl</a>). The sails come from England, so hurry up with ordering because the price could go up after Brexit settles down.</div><div><br /></div><div>Both suppliers may be susceptible to a quatum discount if, for example, ten people of a kayakclub order a sail in one deal. </div></div><div><br /></div><div><br /></div><div>
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<br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-54266244068229107902020-03-09T06:58:00.002-07:002021-10-19T05:23:24.141-07:00Across the raging Tasman Sea, the precursors to Flat Earth <div>The first generation of modern paddle sailors were rather intrepid types with the urge to take advantage of the wind on big waves and long crossings on the Tasman Sea. Here's an ancient YouTube video from the late 1990s. These Aussies still have a stepped mast (through the deck) just in front of the cockpit and regular tent or tarp cloth as a sail. A sewn-in batten is already there, just like with the current Flat Earth sails. This batten keeps the sail at the top leach pointing up, creating sufficient surface while the sail remains low, which is good to prevent too much heeling. </div><div>The disadvantage of these first generation sails is that they were probably less able to sail upwind. It was Mick McRob who perfected his mates' sails into today's Flat Earth models: slightly smaller (0.8 square metres), better cut to get close upwind and the mast far forward on a pivoting baseplate, out of the way of all paddle movements and yet controled from the cockpit with an uphaul line in case of an emergency. It can be lowered within a second an stowed under a bungee. Nowadays a good kayak sail in Australia is often mandatory during large crossings, as are all other safety equipment. </div><div><br /></div><span style="background-color: white; color: white;">d</span><br />
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<span style="background-color: #eeeeee;">I apologize for the over-the-top music of Mendelssohn in the background.</span></div>
<b></b><i></i><u></u><sub></sub><sup></sup><strike></strike><span style="background-color: #eeeeee;"></span><br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-30691581716842210792020-03-04T14:52:00.004-08:002021-10-15T07:37:29.809-07:00Sudden gybe on a downwind run<div><div>The guys from Paddling Fool in Finland are on a downwind run with their Sail Dog sail, a clone of the 1 square meter Flat Earth sail. All goes well, until the sail gybes from left to right uncontrolably. What is going on? Very simple: the sail is still in the position for a beam wind so it is about half way sheeted in. A down wind can fairly easy creep up around and behind the sail causing it to swing in the other direction.</div><div><br /></div><div>Normally a sudden gibe isn't such a problem. After all, the sail is far forward so a boom swinging over cannot hit anything. The sudden pull is quite gentile with a normal Flat Earth sail of 0.8 square meters, provided it is sheeted out far enough so the force is directed forward. Yet this 1 square meter sail is a bit different. The paddler is very bothered by it. A sail sheeted in quite a way on a down wind run causes a lot of tippyness since some of the force not only moves forward but also sideways. </div><div><br /></div><div>The solution is of course simple. The paddler lets the sheet out a little more till the boom and sail is almost perpendicular to the kayak. Now the pushing force in the sail is straight forward, not sideways any more and the inbalance disappears, The chance of gybing is a lot less and the speed also increases. See this movieclip, from 3.05 min. </div></div><div><br /></div>
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<a href="https://www.youtube.com/watch?v=vn9RnYzoDgo">Ongewenst gijpen</a><br />
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<br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com3tag:blogger.com,1999:blog-6166208555826485754.post-35388791311503163462020-03-03T08:43:00.008-08:002021-10-31T10:31:27.150-07:00An unbalanced kayak will turn upwind really fast<div><div><span style="font-size: medium;">Here is an example of what happens if a kayak is not properly loaded. This kayak sailor in Finland thought he could get away with eight kilos more weight in the bow than in the stern. Bad luck for him. His kayak is on a downwind or quarterly wind run but keeps turning upwind because the high stern takes considerably more wind. More important, the stern is lifted out of the water a little but enough to lose it's grip and become susceptible to a side ways drift. </span></div><div><span style="font-size: medium;">He dropped his rudder all the way down as compensation, but it didn't help much. He just loses speed because of the drag around the rudder. With just a skeg down it would have been even worse.</span></div><div><span style="font-size: medium;">In short, kayaking with a poorly balanced boat is a disaster. A few kilos difference between front and rear is still manageable, but eight kilos difference is apparently too much.</span></div><div><span style="font-size: medium;"><br /></span></div><div><span style="font-size: medium;">Here it is:</span></div></div><div><br /></div><span style="font-size: medium;"><a href="https://www.youtube.com/watch?v=tqFOIY9qE5w">https://www.youtube.com/watch?v=tqFOIY9qE5w</a><br /></span>
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<br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-67705255475131262672020-03-02T12:48:00.001-08:002021-10-31T10:40:10.690-07:00Falcon paddlesailors go up- and downwind<br />
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<div>T<span style="font-size: medium;">wo kayakers with a Falcon sail on eastern Lake Erie, USA, approach the tip of one of the Bass Islands. First they paddle straight against the wind to make enough 'height' for a close haul course to the island tip. The last part is on a downwind run, flying towards the harbor and sandy shore.</span></div><div><span style="font-size: medium;">It's nice to see how they quickly throw the sail up in nice waves after a few tiring kilometers only paddling straight into the wind. </span></div><br />
<br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-52339621276200367882020-01-15T12:44:00.002-08:002022-03-09T08:31:15.384-08:00Speedtest Sea Dog Sail (= Flat Earth)<div class="separator" style="clear: both; text-align: center;">
<br /></div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><span style="font-size: large;">Example of a Sea Dog Kayak Sail, more or less a clone of the Flat Earth sail. A short crossing in Finland (Archipelageo Natural Park), somewhere between upwind and half wind. Average speed 7.9 km/h, with a top speed of 13.4 km/h. Without really paddling along. Hold on!</span></div><div class="separator" style="clear: both; text-align: center;">Courtesy of Paddling Fools Production. </div><div class="separator" style="clear: both; text-align: center;"><span style="text-align: left;"><br /></span></div><div class="separator" style="clear: both; text-align: center;"><br /></div>
<a href="https://youtu.be/fRpgm_waaJY"><span style="font-size: medium;">Paddling Fools, speed run</span></a><br />
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<br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-56999523169742581232020-01-12T10:50:00.003-08:002021-12-02T06:44:56.442-08:00Circumnavigating isle of Texel: very little paddlesailing<span style="background-color: #444444; color: #005000; font-family: inherit;"></span><br />
<div style="margin: 0px;"><div style="margin: 0px;"><span style="font-size: medium;">A circumnavigation of Texel is quite an achievement. Since my fitness was near zero during Easter 2019, I decided to get some support from my Flat Earth sail. A helping hand is never lost. The trip with five fellow kayakers, all member of Never Dry in Rotterdam (Marianne, Erik, Iede, Jan) and Chris from Nijmegen went very well, but I was only able to paddlesail for 15 percent of the time. The wind wasn't really cooperating. Sometimes too much headwinds, but more often from good directions but too weak.</span></div><div style="margin: 0px;"><span style="font-size: medium;"><br /></span></div><div style="margin: 0px;"><b><span style="font-size: medium;">ebb current</span></b></div><div style="margin: 0px;"><span style="font-size: medium;">In view of the tide, it was decided to depart from Den Helder on April 20 at noon and to kayak via the western side along the North Sea to campsite Robbenjager in De Cocksdorp, about 34 kilometers. The ebb current pulled us smoothly through the Marsdiep under an indigo sky that faded into an equally blue sea. I immediately set up the sail because the wind was east-north-east. So almost on a beam course I paddled a bit, but the wind was only force 2 or 3 so it wasn't much. Beyond the Noorderhaaks, the divine ebb tide soon diminished. Once north along the beach with dogs barking and children playing, we were on our own. But the wind was blowing a little harder here, despite the lee of the dunes, so I was able to take a lot of advantage from the sail in the meantime. I could do with half the paddle strokes my fellow kayakers made, paddling about forty degrees close haul. That was nice. Also this time I noticed how easily you can get quite a bit of speed from only a few paddle strokes, despite the tight upwind course of about 40 degrees. I did hear 'hey, you lazy pig' every now and then, but I'm used to that now</span></div></div><div style="margin: 0px;"><br /></div><div style="margin: 0px;"><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikUB1FcdFG1GiGGP0zWViSz7NhvkrUrR2cJX3GCaX9NLnyCXRThPOD3Bvdyo3tQb5HiNm0BFV3YTLoab2JXuO1kgnoCIkC_OHtpgs8h0b8ze9fk1RmGbgPMjwP-f8cGHbA9DFceJEBrf5J/s1600/P4200011.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikUB1FcdFG1GiGGP0zWViSz7NhvkrUrR2cJX3GCaX9NLnyCXRThPOD3Bvdyo3tQb5HiNm0BFV3YTLoab2JXuO1kgnoCIkC_OHtpgs8h0b8ze9fk1RmGbgPMjwP-f8cGHbA9DFceJEBrf5J/s400/P4200011.JPG" width="400" /></a></div>
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<br /><div style="margin: 0px;"><span style="font-size: medium;"><b>Fun ended</b></span></div><div style="margin: 0px;"><span style="font-size: medium;">Unfortunately, all fun ended as we continued on because the Texel coast is not straight up north as a ruler but gradually bends to the east. So the further we went, the more upwind I had to paddle. It was pretty much over near the beach dwelling De Koog. I lowered my sail and continued just paddling. After a break at beachpost 16 and another one at the Slufter, things got serious with the wind. It picked up further and now was right against us. According to fellow sailor Iede, this was because the eastern wind at the head of Texel curles more or less around the sanddunes in a direction coming from the north. The last kilometers to the tip (Eierlandse Gat) were indeed quite a challenge. Especially for me, as an undertrained sea kayaker on longer distances. My buddy Iede had to give me some encouragement, as I got a little anxious not knowing how rough it would be between Texel and Vlieland. As a child, countless islanders warned me to stay away from the Amelander Gat and other gaps between all islands with raging currents.</span></div><div style="margin: 0px;"><span style="font-size: medium;">Once past the tip, we were caught by the now-reversed current that pulled us into the gap. My goodness, that was a beautiful sight. A pylon type buoy six meters high lay almost flat on its side groaning and grunting by the supercurrent. Behind this pylon a seething mass of water drew a deep pit. I shot right past it at the speed of a biker. The tide was now against the eastern wind, so we were bobbing on through the steep waves. After about ten minutes we moved onto the beach at De Cocksdorp, where a grueling climb up against the dunes followed with fully packed kayaks, just to find our camp spot. </span></div><div style="margin: 0px;"><span style="font-size: medium;"><br /></span></div><div style="margin: 0px;"><span style="font-size: medium;"><b>Vlieland</b></span></div><div style="margin: 0px;"><span style="font-size: medium;">The next day the most sporty people did a half round of Vlieland, which was cut short because Chris was not feeling well and returned under supervision. On the way Jan shot a beautiful picture of a seal chasing the group.</span></div><div style="margin: 0px;"><span style="font-size: medium;"><br /></span></div><div style="margin: 0px;"><span style="font-size: medium;">I wisely stayed at the campsite to recuperate, but Erik asked if I would go with 'a walk'. Ah, why not? What started out as a nice promenade through the dunes in my sandals, eventually became a death march of more than twenty kilometers along the beach, the Slufter, the polders, the new residential areas far outside De Cocksdorp, just a detour to a supermarket, a hot snack and a liter of beer on a dull terrace and then off to the campsite. After seven hours of marching at Erik's pace and four blisters, I collapsed on a borrowed air mattress because I had forgotten mine. After that I don't remember anything.</span></div><div style="margin: 0px;"><span style="font-size: medium;"><br /></span></div><div style="margin: 0px;"><span style="font-size: medium;"><b>Retreat</b></span></div><div style="margin: 0px;"><span style="font-size: medium;">More dead than alive, I started the retreat on day three. Back across the dunes with full kayaks with the carts dangling loosely at the bottom. Iede showed the route on the laminated maps one last time: an impossible route way out on the Waddenzee through narrow shallow waters among sandbars just hidden under a high tide. From my kayak all you could see was ocean so following a complicated path onto the horizon seemed illogical. But we knew it was a matter of one or two hours before the sandbars would pop up, terminating our trip. Finally we approached a larger passages, the infamous Texelstroom that has been in use for centuries. Here we caught a low tide back to Texel with great speed of about three miles an hour of current. The whole detour which you can clearly see on the map took us about two extra hours. In my mind I heard myself ask the question why we couldn't just paddle straight along the dike on the east of Texel. A stupid question, I suspected. The Waddenzee is well known for it tides, riptides, shallow waters en steep waves. Paddlesailing in a straight course is almost impossible.</span></div><br /><br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-QSGxmeHbrh2snAfKetzc1GqUA3W3nx2AxJSWJhjdn6njl1FlROD4hpwne7w4Wz-7MPwAfIQYBi0KkcytIKN_E1-YOsvmANVrpOigZOgmAynnjiOp4z5VzcLgPABcEzKOLF7-P2fGTRds/s1600/Dag+3+%252822+april%2529.JPG" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="834" data-original-width="594" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-QSGxmeHbrh2snAfKetzc1GqUA3W3nx2AxJSWJhjdn6njl1FlROD4hpwne7w4Wz-7MPwAfIQYBi0KkcytIKN_E1-YOsvmANVrpOigZOgmAynnjiOp4z5VzcLgPABcEzKOLF7-P2fGTRds/s640/Dag+3+%252822+april%2529.JPG" width="454" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Going south and way out in the Waddenzee to avoid shallow waters.</td></tr>
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<div style="margin: 0px;"><span style="font-size: medium;">Anyway, it was little consolation after going so far out east, that I could raise my sail again going back south-west on a quarterly course. However, no spectacular paddle sailing on this day either. Although wind force four to five was predicted with waves of one meter which led to a quick prayer during breakfast, but it would be limited to windforce two, at most three, all day long. With that gentle breeze at my back, I soon went so fast that I didn't feel any wind at all.</span></div><div style="margin: 0px;"><span style="font-size: medium;">During our arrival at the carparking in navytown Den Helder it became clear how extraordinairy that was. Though almost no wind at sea, the predicted windforce did occur right above land and Texel. A divine hand had draped a gentle bubble over our position at sea. I guess my eary morning prayers did help. But please, dear Lord, a little bit of wind would have been nicer. Thank you.</span></div><div style="margin: 0px;"><span style="font-size: medium;"><br /></span></div><div style="margin: 0px;"><span style="font-size: medium;">Thanks to Jan (photos) and Iede for the organization, especially all calculations of the tides and the correct departure times. It was a fun puzzle.</span></div>
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<b></b><i></i><u></u><sub></sub><sup></sup><strike></strike>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-87127183892484566522019-04-15T08:45:00.002-07:002022-02-16T13:18:06.638-08:00Tinkering with a sail (1): making my own kayak sail<div>This winter I made a test sail myself from a cheap tarp at the DIY-store. Why? Well, I am very satisfied with the Falcon sail. The sail enables me to get upwind and is quite fast. However, there is a disadvantage: in strong wind gusts on a beam course the kayak can easily tip over. You have to hang out, but how long can you keep it up? Moreover, you do not always respond quickly enough. In large waves and strong winds, say force five, you also have lots of other things on your mind than watching for unexpected gusts of wind. </div><div><br /></div><div>I think I know why:</div><div>1) The Falcon sail is classically cut in the shape of an airplane wing, as opposed to a Flat Earth model which has an even curvature across the entire width of the sail. This causes less suction behind the sail, which improves stability (but not speed).</div><div>2) The Falcon model has a leech that curls inward enormously, a so-called closed leech. Well, a little curl is fine, but this is overdone. Mainly beneficial on a downwind run, but not on a beam course. At least that's my opninion. </div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwQvSsMUI94yjhEWdRt7aXxmWL1QEWeDabzXUSUIPYc06eVOqs7qdFLXSq92EEOs0QGNDv_mV3KCAjwASycqe4z0tthIo4Pk1Hx1BcseZ1IvXaAPSc4vWkKt0dH_QJtEUreJIViECBiLGq/s1600/gesloten+achterlijk+Falcon.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1600" data-original-width="1200" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwQvSsMUI94yjhEWdRt7aXxmWL1QEWeDabzXUSUIPYc06eVOqs7qdFLXSq92EEOs0QGNDv_mV3KCAjwASycqe4z0tthIo4Pk1Hx1BcseZ1IvXaAPSc4vWkKt0dH_QJtEUreJIViECBiLGq/s400/gesloten+achterlijk+Falcon.jpg" width="300" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span><br />The leech of a Falcon sail. The wind does blow the leech a little more open, but it's still abnormally closed, which traps the wind and makes the kayak lean unnecessarily. <br /><br /><br /><br /></span></td></tr>
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<div><div>I have the feeling that the wind is being 'held' way too long because of this. For an optimal sail, the wind has to be released fairly easily at the back so that the wind can blow smoothly along the sail. A very closed leech forms an obstruction when paddle sailing upwind or on a beam. You will feel every gusts as a sudden jolt, risking a capsize.</div><div><br /></div><div>My approach is twofold. I make a sail that has at least a flatter, more open leech. And while I'm at it, I think it would be useful to move the draftpoint (deepest point of the sail) a little more forward and reduce the camber (the deepest point itself) a little for even better upwind performance.</div><div><br /></div><div>My plan, based on a Falcon sail, looks like this: </div></div><div><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLds5nCWzHdgsZ50LqSNP8Gk-e5gP51GFQaSqqk7bLJqpbpw9gmOWHXoSlU1YZQo0B2y1a1OoJPX3lolCqG0E_wn_f8ICjP32bPOuBTXmLOqJfSKxXyCiSdjSXxksP9xNeRYUdFVSClNGR/s1600/Model+Falcon.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1284" data-original-width="992" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLds5nCWzHdgsZ50LqSNP8Gk-e5gP51GFQaSqqk7bLJqpbpw9gmOWHXoSlU1YZQo0B2y1a1OoJPX3lolCqG0E_wn_f8ICjP32bPOuBTXmLOqJfSKxXyCiSdjSXxksP9xNeRYUdFVSClNGR/s640/Model+Falcon.png" width="494" /></a></div>
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<br /><u>< Translation will follow</u>> Hoewel zeilmaken een eeuwenoud zeer complex vak is van mensen die ongelooflijk veel ervaring hebben, is het wel degelijk mogelijk om zelf ook iets te maken. Zeker als het gaat om een zeiltje van slechts 1 vierkante meter en als je begint met een proefversie van een plastic Gamma dekkleed van nog geen 10 euro.<br />
Ik beschrijf hier eerst het algemene idee. Later volgen de details, die net zo belangrijk zijn.<br />
Je hebt nodig: een gewone naaimachine (vraag je moeder hoe die werkt), een goede schaar, een rolletje dubbelzijdig zeilmakerstape en/of schilderstape en een zakje zeilogen van 10 millimeter gatmaat met een slagplaatje dat vaak ook in het zakje zit.<br />
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Banen</h3>
Het belangrijkste is te weten dat een zeiltje niet vlak is maar bol. Daarom knippen we vier banen uit het dekkleed (A,B,C, en D). De banen zijn aan de bovenkant krom. Begin met de onderste baan (A). Plak een strip langs de kromme bovenkant en plak dan de volgende baan - met een rechte onderkant - stukje bij beetje erop. Te beginnen aan de voorkant, bij de mast. Je zult merken dat het zeiltje al gauw gaat 'frommelen'. Dat is goed want in de wind zal het zeil daardoor een bolling aannemen. Doe hetzelfde met de volgende banen tot je bovenin bent. Iedere baan is dus krom van boven en recht van onderen.<br />
Let op: Baan A heeft op zich wel de juiste breedte, maar baan B niet doordat deze met een rechte onderkant wordt gedwongen de kromme bovenkant van baan A te volgen. Hierdoor loopt B in waardoor je aan het achterlijk tekort komt. Knip daarom baan B zo'n vijftig centimeter langer uit voor de zekerheid. Doe hetzelfde bij C en D. Daarna knip of snij je pas de eigenlijke achterkant op de juiste maat. Ik zou trouwens baan A ook wat extra breedte geven omdat we later over het hele achterlijk ook nog een lichte bolling maken.<br />
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Begin</h3>
Alle zeilmakers beginnen met het uitzetten van de contouren van het zeil met schilderstape op een houten vloer. Zo heb je enig idee hoe alles past. Dan pakken zij een eerste doek om de onderste baan A te snijden/knippen. Deze baan mag precies op de juiste breedte want deze zal niet verlopen als de volgende baan erop gaat. Houdt wel rekening met de latere bolling over het hele achterlijk dus voeg gerust tien centimeter breedte toe. Bovendien heb ik op het achterlijk en onderlijk 12 mm extra gesneden die ik later omvouw tot zoom. De voorkant heeft geen zoom want hier wordt later de masthoes op genaaid.<br />
In plaats van een zoom kun je nog beter het zeil aan het achterlijk en onderlijk voorzien van een reep zeil en die om de randen vouwen, vastplakken en vastnaaien. In dat geval komt de extra 12 mm zeil te vervallen. De breedte van die reep zou ik nemen op 30 mm, dus 15 mm aan beide kanten. Zo ziet die reep/zoom eruit:<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5o2tgA5l1bAy5tjvyBMlebAXbJkH5Fa1z7pQtbEU9b4acKgH3LmkJqnDiM5B_2_HYfE5i5TQnUmnLmwn28rHiOQxguYsn4HOKxOxGCrBAkvptrhpJ-gGJ5s0Epwd1mCajSp4AnutcP2ks/s1600/Zoom+Falcon.jpg" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1600" data-original-width="1200" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5o2tgA5l1bAy5tjvyBMlebAXbJkH5Fa1z7pQtbEU9b4acKgH3LmkJqnDiM5B_2_HYfE5i5TQnUmnLmwn28rHiOQxguYsn4HOKxOxGCrBAkvptrhpJ-gGJ5s0Epwd1mCajSp4AnutcP2ks/s320/Zoom+Falcon.jpg" width="240" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">Een reep extra stof langs het achter- en onderlijk dient als zoom. Dubbelgevouwen, dus beide kanten van het zeil worden zo beschermd. </span></td></tr>
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Je kunt dus het beste met de schilderstape de vorm van het zeiltje markeren zoals het later eruit zal zien, inclusief bolling van achterlijk en onderlijk (zie 'Let op' hieronder). Je zal dan per se niet de banen precies langs de schilderstape moeten snijden want dan kom je overal te kort!<br />
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<h3>
Bolling</h3>
De juiste bolling in het zeil is iets waar zeilers niet over uitgesproken raken. Ik heb gekozen voor een tamelijk gewone bolling. De dikke strepen tussen de banen in de tekening laten zien hoe de bolling in elkaar zit (in millimeters). De maximale diepte van de bolling heet <i>camber</i>. De plek waar dat diepste punt zit heet <i>draft point</i>. We beginnen weer met baan A. Zet deze voorlopig vast met pin up-prikkers in de vloer. Nu komt het mooiste werkje: we gaan de bolling tekenen met potlood of viltstift op de eerste baan. Daarvoor nemen we een dunne vierkante lat van pakweg twee meter lang. Deze leggen we tegen de twee pins aan in de linker- en rechterbovenhoek. We kunnen nu de lat verder omhoog duwen tot de gewenste <i>camber</i> op precies het juiste <i>draftpoint. </i>Het is dus noodzakelijk om baan A langs de bovenrand iets ruimer uit te knippen zodat de bolling er ook nog in past. Later snijden we het overtollige zeil langs de bollingslijn weer weg.<br />
Hoe ver druk je de lat omhoog en waar druk je precies? Ik heb gekozen voor een draftpoint van 37 procent. Dat wil zeggen op iets meer dan een derde van de bovenrand van A, vanaf de mast gerekend. Daar zit het diepste punt. Vervolgens heb ik de lat op die plaats 120 mm opgedrukt en tijdelijk vastgezet met een extra pin. Toen heb ik de lijn langs de lat afgeschreven.<br />
Deze aldus verkregen bolling is natuurlijk arbitrair. Ik heb mij laten inspireren door de vele publicaties via Google. Achteraf had ik misschien liever de drafpoint ietsje dichterbij de mast moeten maken, zeg op 30 procent. Ik heb zelfs 25 procent voorbij zien komen op internet (voor zeer scherpe aan-de-windse koersen, een bolling verder naar achteren is weer gunstiger voor halve wind).<br />
Waar ik in ieder geval op heb gelet is dat de bolling naar achteren toe, voorbij het drafpoint, heel geleidelijk toeloopt naar het achterlijk. Zonder extra bollinkje bij het achterlijk, zoals bij het Falcon-zeiltje. Ik wil dat het zeiltje de wind zonder gedoe kan loslaten om vervelende hellingkrachten van de kajak te voorkomen. Met de wind in de rug is zo'n gesloten achterlijk welkom, maar niet als ik op andere koersen er alleen maar last van heb.<br />
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Let ops</h3>
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Er zijn nog allerlei zaken waar je op moet letten. Ik noem er hier een paar.<br />
1) Houd goed rekening met een <b>overlap</b> op de banen van 12 mm. De bovenrand van iedere baan (of de onderrand van de volgende baan) heeft die 12 mm extra nodig om de banen later op elkaar te zetten.<br />
2) Houd ook rekening met de <b>zoom</b> van 12 mm. Deze zoom komt langs het onderlijk en langs het achterlijk. Maar ik zou kiezen voor een smalle reep zeilstof en die om de zeilrand vouwen, bij wijze van dubbele zoom (ie voorgaande foto). In dat geval komt de 12 mm extra stof voor een gewone zoom te vervallen.<br />
3) Het <b>onderlijk</b> van de onderste baan A heeft ook een bolling. Ik heb gekozen voor 20 mm. Nog meer bolling zou plooien in het zeil kunnen geven. Waarom die bolling daar zit is mij niet geheel duidelijk. Maar ieder zeil dat alleen vastzit in de onderste hoeken en dus niet langs de hele giek, (een 'losse broek') heeft zo'n onderste bolling. Dus doe ik het ook.<br />
Het achterlijk heeft eveneens een bolling. Ik heb gekozen voor een bescheiden 50 mm om niet te veel een gesloten, omkrullend achterlijk te krijgen.<br />
4) Het aan elkaar <b>plakken van de banen</b> is een secuur werkje. Begin met het aanbrengen van dubbelzijdig zeiltape op de bolle bovenkant van iedere baan. Enkelzijdige tape kan ook, maar die trek je er tijdens het vastplakken van de volgende baan weer af zodat de lijm achterblijft om de volgende baan vast te hechten. Dubbelzijdig tape laat je zitten om later dwars doorheen te naaien. Trouwens, als je een pvc-dekkleed van de bouwmarkt als proefzeiltje gebruikt, zal de zeiltape slecht plakken. Zelf heb ik de banen vastgezet met schilderstape en dat naderhand vastgenaaid.<br />
Hoe dan ook, begin heel netjes te plakken vanaf de mastzijde. Houd de randen van beide banen goed plat bij het op elkaar drukken. Verderop begint het zeil als een gek in elkaar te frommelen maar dat geeft niet. Belangrijk is dat beide banen volmaakt plat op elkaar aangrijpen. De kleinste bobbeltjes in de geplakte naad verstoren de bolling en zorgen later voor rimpels in het zeil als de wind erin blaast. Trek desnoods het zeil weer even een stukje los en begin daar opnieuw. De lijmverbinding wordt dan zwakker maar dat komt helemaal goed tijdens het vastnaaien.<br />
5) Hetzelfde geldt voor de <b>masthoes</b>. Ook deze moet volmaakt strak langs het voorlijk lopen en mag zeker niet gedraaid erop zitten. Dit zou zeker nog grotere rimpels veroorzaken. De masthoes is gewoon een reep zeil dat om de mast past, plus drie centimeter ruimte voor een gemakkelijke pas en nog eens zo'n 20 mm extra als overlap om op het zeil te naaien. Al met al een flinke hoes! Voor mijn mast van 25 mm diameter heb ik een masthoes gemaakt voor 140 mm omtrek.<br />
6) De <b>afmetingen</b> van de banen bepaal ik als volgt: de onderste baan is vrij smal bij de mast, zo'n 210 mm. Dan waaiert hij uit naar achteren. De uitwaaiering ontstaat vanzelf als je de bovenrand van de baan haaks zet op het achterlijk met een winkelhaak. De andere banen verdeel je in gelijke porties over de rest van het zeil, telkens haaks op het achterlijk. De reden voor deze haakse loop is dat je later een definitief zeiltje maakt in lichte dacron. Deze stof is rekbaar, iets wat je niet wilt, en een haakse hoek vanaf het achterlijk geeft de minste rek.<br />
7) Als alles in elkaar zit, komt de <b>naaimachine</b> voor de definitieve bevestiging van de banen, de zoomen en de masthoes. Ik zou er een avondje voor uittrekken met je moeder, vrouw of vriendin om te leren naaien. Neem een draad zo dik dat ie nog net door het oog van de naald past. Verder is het invoeren van de draad en de spoeldraad een heel gedoe. De machine bedienen is ook nog een toestand. Vooruit, achteruit, hoe doe je dat? Gebruik voor de naden die sterk moeten zijn een zigzag patroon (met name de baanverbindingen). De zoomen kunnen gewoon met een rechte steek.<br />
8) Probeer de ogen in het zeil te slaan op de zoomen, daar is de stof sterker. Desnoods naai je in de hoeken een driehoekig lapje aan beide kanten van het zeil om daarna het oog in te bevestigen.<br />
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Dat was ie weer. Veel succes. Kijk ook eens op YouTube en Google, onder <i>broadseaming sail</i>.<br />
Zie ook mijn post <b>'Tinkering with a sail (2) Making a trial version'</b> voor het voorlopige resultaat.<br />
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<br /></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-77371182059585681932019-04-11T14:24:00.002-07:002021-12-02T07:11:45.935-08:00Tinkering with a sail (2): making a trial versionThis is the result of my first test sail, performed with a Wall Mart PVC tarp. See also my other post 'Making your own kayak sail' for making your own sail. <br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzWiSVFKOeRNFXOpl8vH8ypM5yyFIdzwqF44qvg_kHY2tAjAE83lmHdgeV3BDakMexmM1tWPPzkPyNalAzcGgiSbBpAdqG7rWbNpyF-x6Khnqv4NA_o-kjExS96fRj5kJdK8EFes-QmEYg/s1600/Zelfgemaakt+zeiltje.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzWiSVFKOeRNFXOpl8vH8ypM5yyFIdzwqF44qvg_kHY2tAjAE83lmHdgeV3BDakMexmM1tWPPzkPyNalAzcGgiSbBpAdqG7rWbNpyF-x6Khnqv4NA_o-kjExS96fRj5kJdK8EFes-QmEYg/s640/Zelfgemaakt+zeiltje.jpg" width="480" /></a></div>
<br /><span style="font-family: times;"><span class="VIiyi" jsaction="mouseup:BR6jm" jsname="jqKxS" lang="en" style="-webkit-tap-highlight-color: transparent; background-color: whitesmoke; display: inline; white-space: pre-wrap;"><span class="JLqJ4b" data-language-for-alternatives="en" data-language-to-translate-into="nl" data-number-of-phrases="1" data-phrase-index="0" jsaction="agoMJf:PFBcW;usxOmf:aWLT7;jhKsnd:P7O7bd,F8DmGf;Q4AGo:Gm7gYd,qAKMYb;uFUCPb:pvnm0e,pfE8Hb,PFBcW;f56efd:dJXsye;EnoYf:KNzws,ZJsZZ,JgVSJc;zdMJQc:cCQNKb,ZJsZZ,zchEXc;Ytrrj:JJDvdc;tNR8yc:GeFvjb;oFN6Ye:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d" jscontroller="Zl5N8" jsdata="uqLsIf;_;$10" jsmodel="SsMkhd" jsname="txFAF" style="-webkit-tap-highlight-color: transparent; background-color: #d2e3fc;"><span jsaction="click:qtZ4nf,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:qtZ4nf,c2aHje" jsname="W297wb" style="-webkit-tap-highlight-color: transparent;">Okay, it doesn't look quite right. The cause is the mast sleeve that I quickly sewed on as the last part of the work. The sleeve got on twisted, resulting in wrinkles in the sail.
But a first test with wind force five soon showed that this sail generates a lot less heeling force for my kayak. This is mainly because the leech is much flatter than that of the original Falcon sail. This allows the wind to race past the sail more easily without drag at the leech. This improvement will therefore certainly return in the final sail in dacron.
During the test I crossed the Kralingse Plas in Rotterdam, the Netherlands on a reaching, windward course in 9 min.15 sec. with moderate paddling along which was okay despite the strong wind. Then I did the same route with the original Falcon sail. That was quite a nightmare. The speed was considerably higher for the first ten seconds - I estimate about 13 km/h - but after that I had to lean out a lot to keep the kayak stable. Actually, I had no control over the boat. I tended to counterbalance the heavy leaning with an equally heavy paddle support on the water, causing me to lose speed and keep the boat turning into the wind. It became a wobbly crossing, at times at tremendous speeds, but then stalled again by the heavy paddlesupport and luffing. I was releaved to reach the other side of the lake in one piece, in 10 min. 25 sec. That is slower and much more restless than my unsightly test sail!
Conclusion: a flatter leech is a big improvement in high winds. I have also brought the draft point (the position where the sail has the deepest point) a little further forward, so that I will hopefully reach higher upwind. The Falcon sail l is an excellent sail by the way, but in wind force 5 you have to be in good shape to handle the enormous speed without excessive leaning and supporting with your paddle blade, which again negates the great speed. Also I believe the Falcon sail has a very open leech - it furls round like the leaf of a tree - to keep the wnd in the sail a little longer. This generates more power on a beam course and down wind, but may work counterproductive going upwind for the wind needs to let go of the sail as smooth as possible at the leech end. The ques</span></span></span></span><span style="background-color: #d2e3fc; font-family: times; white-space: pre-wrap;">tion now is whether my test sail also performs better in normal wind. I do not think so. The advantage is probably only felt in high winds.</span><div><span style="font-family: times;"><span class="VIiyi" jsaction="mouseup:BR6jm" jsname="jqKxS" lang="en" style="-webkit-tap-highlight-color: transparent; background-color: whitesmoke; display: inline; white-space: pre-wrap;"><span class="JLqJ4b" data-language-for-alternatives="en" data-language-to-translate-into="nl" data-number-of-phrases="1" data-phrase-index="0" jsaction="agoMJf:PFBcW;usxOmf:aWLT7;jhKsnd:P7O7bd,F8DmGf;Q4AGo:Gm7gYd,qAKMYb;uFUCPb:pvnm0e,pfE8Hb,PFBcW;f56efd:dJXsye;EnoYf:KNzws,ZJsZZ,JgVSJc;zdMJQc:cCQNKb,ZJsZZ,zchEXc;Ytrrj:JJDvdc;tNR8yc:GeFvjb;oFN6Ye:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d" jscontroller="Zl5N8" jsdata="uqLsIf;_;$10" jsmodel="SsMkhd" jsname="txFAF" style="-webkit-tap-highlight-color: transparent; background-color: #d2e3fc;"><span jsaction="click:qtZ4nf,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:qtZ4nf,c2aHje" jsname="W297wb" style="-webkit-tap-highlight-color: transparent;">
My thanks go to Iede who accompanied me in his kayak during the severe weather test and to my wife Annemiek who taught me to operate her sewing machine.</span></span></span><span style="background-color: whitesmoke; white-space: pre-wrap;"> </span><br /></span><div><br /></div><div><br /></div><div><br />
<br /></div></div>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-17662382918807868412019-04-10T05:00:00.000-07:002020-03-15T12:37:09.405-07:00Prutsen aan zeiltjes (3): Een rolreef, wat een waanzin!Ja, ik ben knettergek. Moet mij laten opnemen. Deze winter heb ik een rolreef bedacht voor een Falconzeiltje. Dit kan alleen met een doorgestoken mast zonder verstaging. Anders kan de mast natuurlijk niet draaien.<br />
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Het idee is simpel: als de mast draait en het zeiltje meeneemt, kan je zeil minderen wat in sterke wind erg prettig is. Ik ben begonnen door een lijntje direct vast te prutsen op de mast (25 mm diameter carbon). Toen ik dat naar me toe trok, bleek de mast vast te lopen in zijn gat. Dus had ik een grotere spoed nodig, in de vorm van een plastic velg van een kruiwagenwiel. Kost geen drol.<br />
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Toen dacht ik: als ik twee lijnen vastmaak op dat wiel, kan ik vanuit de kuip het zeil oprollen en ook weer uitrollen. Dat bleek redelijk te werken, maar al gauw kropen de lijnen over elkaar heen op het wiel dus raakte het zaakje bekneld. Nu moet ik nog een pvc kap over de spoel maken waar de twee lijnen doorheen worden geleid zodat ze niet in elkaar draaien. Dat komt nog.<br />
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Het laatste probleem is dat de giek bij in het inrollen van het zeil omhoog wordt getrokken tot het inrollen niet verder gaat. Ik moet dus ook de giek wat losser kunnen zetten voordat ik het zeil oprol. Ook dit komt nog.<br />
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Hier alvast een impressie:<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXEW-h1YnKdDlyR588249TIjhT3G6aQD_Z0hQgG5utoyQM0I1XSm_Uarr5qtIwuRe0TTpD6-4v0iLm_jQVqqfVARVMJt-lBGZxk4Z4uWua1bCMn3nIo-vmzXfHf3jsb3W6jZdPCFFY5ZwD/s1600/Rolreef+mast.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXEW-h1YnKdDlyR588249TIjhT3G6aQD_Z0hQgG5utoyQM0I1XSm_Uarr5qtIwuRe0TTpD6-4v0iLm_jQVqqfVARVMJt-lBGZxk4Z4uWua1bCMn3nIo-vmzXfHf3jsb3W6jZdPCFFY5ZwD/s640/Rolreef+mast.jpg" width="480" /></a></div>
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De kruiwagenvelg zit om de mast geschoven en is vastgezet met een deelbare stelring die is doorgeschroefd op de velg. Zo ontstaat een hechte verbinding. Erg handig die stelringen. Je kunt er allerlei dingen mee vastzetten op de mast, zodat bijvoorbeeld de giekverbinding niet naar boven schuift. Die verbinding moet namelijk losjes op de mast blijven zodat hij kan draaien zonder de mast mee te nemen. Hier ziet zo'n stelring eruit:<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPRiQwpvTBZZcK4D8O6QH1iHuwm8hrBdHvRZSKlyAu-FslOnbfySerJp8ZnNIDXx8Kc_SoG-rSV9suR3RUNt2SAOlYy29pHHuDxvwHbxkr9buhH8z40cn1GXPMx7TQpy0NL6e7D3-4VdGy/s1600/Stelring.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPRiQwpvTBZZcK4D8O6QH1iHuwm8hrBdHvRZSKlyAu-FslOnbfySerJp8ZnNIDXx8Kc_SoG-rSV9suR3RUNt2SAOlYy29pHHuDxvwHbxkr9buhH8z40cn1GXPMx7TQpy0NL6e7D3-4VdGy/s400/Stelring.jpg" width="400" /></a></div>
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Nou bestaat er veel scepsis als het gaat om een rolreefsysteem voor een enkel, klein zeiltje. Critici, onder wie de ontwerper van het Falconzeil Patrick Forrester zeggen dat het voorste profiel van het zeil danig wordt verstoord als een deel zich om de mast wikkelt. Een rolreef om de giek zou beter zijn, maar dat is technisch veel lastiger. Een rolreef is daarom zinloos. Je hebt in harde wind nauwelijks profijt van een zeiltje met mismaakt vliegtuigprofiel. Ik geloof dat nog niet helemaal. Rolreefsystemen voor een fok zijn toch ook heel normaal. Ik ga het toch uitproberen. Wat geeft het. Zo blijf ik van de straat en het kost een paar tientjes.<br />
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Als alles klaar is, komt er een vervolgreportage.Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-70503169919669692832019-04-08T12:19:00.000-07:002020-03-19T11:43:18.161-07:00Prutsen aan zeiltjes (4): Mijn eigen Falcon-tuig<span style="font-family: "arial" , "helvetica" , sans-serif;">Ja, ik ben gestoord. Koop ik alleen een Falcon-zeiltje van Patrick Forrester, de rest van het tuig besluit ik zelf te maken. Met ook nog een doorgestoken mast door mijn kajakdek in plaats van het gebruikelijke flexibele voetje op het dek. Waarom toch?</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Tja, als je lang bent, een lange peddel gebruikt en houdt van flinke voorwaartse slagen, kan het zeiltje wel eens in de weg zitten bij aan-de-windse koersen als het bijna helemaal is ingetrokken. Daar heb ik soms last van. De remedie is natuurlijk een mastje dat verder naar voren staat. Maar daar, ver voorbij je voorluik, is de boot wel erg smal (17 cm in mijn geval)en komen de zijstagen wel heel steil te staan. Eenvoudige mechanica leert ons dat hoe steiler de stagen staan, des te groter de neerwaartse kracht. Kortom, ik vertrouwde die smalle plek voorop mijn kajak voor geen meter. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Avontuur</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">En zo kwam ik op het idee om dan maar de mast helemaal door te steken door mijn dek tot op de bodem van mijn boot. Dan heb je geen stagen nodig wat een keurig, strak aangezicht geeft. Dit was het begin van een groot avontuur. </span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Ik vroeg mij eerst of een doorgestoken mast niet meer zou wrikken aan de boot waardoor de kans op kapseizen groter zou worden. Er zouden immers twee krachtpunten aan de boot trekken, in tegenovergestelde richting. Een kracht rond de uitgang van het mast door het dek, en een kracht door andere kant op vanaf de bodem van de boot. Ik ben geen wiskundige, dus dit hield mij 's nachts wakker. Ik heb er een plaatje van gemaakt: </span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOK_iK3UDaitWL0_wI7vBQ86P-i31NILKlXdLjaQe2bNjev59FiL2Ny71L46Baj92x08MH4Fed9ZmBNJuktC1GIV4yqj92hu5WUVcwSfCqkErOZT2DHRZzGUDyI0eAVEstxVjDO1StUp6M/s1600/Hellingkracht.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="992" data-original-width="1284" height="494" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOK_iK3UDaitWL0_wI7vBQ86P-i31NILKlXdLjaQe2bNjev59FiL2Ny71L46Baj92x08MH4Fed9ZmBNJuktC1GIV4yqj92hu5WUVcwSfCqkErOZT2DHRZzGUDyI0eAVEstxVjDO1StUp6M/s640/Hellingkracht.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">Links de doorgestoken mast, rechts de normale mast op het dek, met stagen</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Deskundige kennissen met veel verstand van mechanica verzekerden mij unaniem dat het niet uitmaakt. Zolang alles vastzit aan elkaar, zal de hellingkracht van het zeiltje in gelijke mate doorwerken in de boot. Laat ik dat dus maar aannemen.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Allereerst zaagde ik een gat ik mijn dek en uit een oude zeevishengel de juiste maat pijp. Die heb ik zorgvuldig in mijn boot gelamineerd, precies onder het gat en precies haaks op de bodem zodat de mast ook precies vertikaal zou staan. Daarna de boel stevig dicht gelamineerd met glasmat en epoxy. Dit vereiste diverse lagen op een moeilijk bereikbare plek maar dat is gelukt. Aan de voet van de pijp heb ik eerst met schotjes en duckt tape een badkuipje gemaakt, de pijp daarin geplaatst en het zaakje volgegoten met epoxy. Het achterste schotje moet nog weg. </span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwfpWoKo8eiDCnLh4HCx4W1VSD7lCGsdfIZAVjeJXriFwdfdshWlUKlHKimTyQbplTIspO6urQXDHsKYQwU0fEbP1owwwfhgLYy9P2c5mIFPLIWjGIpSMe5qYtSEdsBib_6qSmE4_RqGBZ/s1600/Falcon+dekoverzicht.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="1600" data-original-width="1200" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwfpWoKo8eiDCnLh4HCx4W1VSD7lCGsdfIZAVjeJXriFwdfdshWlUKlHKimTyQbplTIspO6urQXDHsKYQwU0fEbP1owwwfhgLYy9P2c5mIFPLIWjGIpSMe5qYtSEdsBib_6qSmE4_RqGBZ/s640/Falcon+dekoverzicht.jpg" width="480" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Excuses aan iedereen die hier iets heel anders in ziet.</span> </td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Vervolgens ging ik op zoek naar een carbon buis van 25 mm diameter en twee meter lang, waarvan de onderste 25 cm in de pijp passen. Het werd een drielaags buis van unidirectioneel carbon die sterk genoeg is in alle buigrichtingen. Voor de zekerheid stopte ik massieve glasvezelpijpjes ('staf') op de drukpunten, met name de plek waar de mast uit het dek komt. Alle buigspanning verderop in de mast komt hier namelijk samen. </span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Voor de rest volgde ik redelijk het originele tuig van Falcon. De onderdelen zijn wel verkrijgbaar na enig speurwerk op internet. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Ovaal gat</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">De grootste uitdaging was deze: hoe krijg je vanuit de kuip een mast in een gat dat twee meter verderop zit??? De oplossing was een gat met een soort gootje waar de mast alvast in kon liggen als ik 'm omhoog hield met een hand. Zo zou de mast in ieder geval niet uit z'n gat schieten tijdens het optrekken. Het gat kreeg hierdoor van boven gezien een beetje ovale vorm. Tot nu toe ging het goed. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Mastgat in wording, met aflopend gootje. De pijp is van een zeehengel, omwikkeld met carbon-epoxy waar het gootje aan vast is geboetseerd (met een stukje bezemsteel als malletje) </span></div>
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Mastgat klaar. De topcoat mag nog wel een keer.</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Optrekken</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Voor het optrekken wilde ik een normale voorstag gebruiken die van de mast naar de toggle voorop liep en dan helemaal terug naar de kuip. Dan bleek foute boel. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Tijdens een eerste proef op het droge bleek de mast met zeiltje en giek onderweg omhoog ook als een gek naar links en rechts uit te zwaaien. Zo zou de mast nooit recht boven het gat komen om in de pijp te zinken. Zeker niet op de golven! Een voorstag als treklijn werkte dus niet.</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Ik besloot een lange stok te kopen bij de Gamma en prutste daar een haakje aan dat paste in een oogje in de top van het zeil. Dat werkte al beter, maar de wiebelige stok was bijna 2,5 meter lang. Hoe berg je die op? Geen fraai gezicht op een kajak en eigenlijk onhanteerbaar.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">De echte oplossing kwam toen ik de rest van de zeehengel bekeek en zag dat er een lengte van zo'n 80 cm over was die precies op het uiteinde van de giek paste. Op die manier kon ik de giek wat verlengen en gebruiken om de mast helemaal op te drukken. Ik had daarmee ook redelijk grip op de mast om hem precies recht boven het gat te krijgen. Op het droge lukte dit prima.</span><br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Giek met opzetstuk om de mast op te duwen</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Mis</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Maar een week later ging het op het water in stevige wind al gelijk mis. De wind pakte het zeil en drukte mijn hele mast-giekcombinatie vrolijk opzij waardoor deze in het water viel. Geen houwen aan vanuit mijn kuip! Gelukkig bleek dit eenvoudig te voorkomen. Aan de achterhoek van het zeil zit een zogenaamde klauwlijn van Falcon die het zeiltje daar verbindt met de giek. Het touwtje zit vast in een klemmetje op de giek zodat je het makkelijk kunt straktrekken of juist uitvieren. Zo creëer je meer of minder bolling aan de onderkant van het zeil.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Ik koos voor een langer klauwlijntje van wel een meter zodat het zeil ongestoord kan wapperen in de wind zonder de giek mee te trekken. Dit bleek het ei van Columbus. Voortaan kan ik de giek en mast helemaal opduwen terwijl het zeil ongehinderd een stuk opzij kan waaien. Als de mast in de pijp is geploft, trek ik het klauwlijntje weer aan. Daar kan ik net bij als ik enigszins in de wind lig.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><b>Giekneerhouder</b></span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Om de Falcon-way helemaal te volgen, heb ik ook nog een giekneerhouder aangebracht. Deze lijn begint onderaan de giek en loopt via een ring onderin de mast - vlak boven dek - terug naar de kuip. Zo kan ik de giek neertrekken, wat erg handig is als de wind in de rug de neiging heeft het zeil erg te laten bollen en dus de giek omhoog te trekken. Een wat strakker zeil is beter, dus de giekneerhouder trek ik dan lekker strak aan. </span><br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">De giekneerhouder.</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Een bijkomend voordeel van de doorgestoken mast zonder stagen is dat het zeil en de mast 360 graden kunnen ronddraaien. Normaal heeft het Falcon-zeiltje stagen die boven de giek aan de mast vastzitten, dus dan kan de giek niet verder dan haaks op de kajak staan. Bij verder uitzwaaien komt de giek tegen de stagen. </span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Ik vind het een veilig idee om met harde wind in de rug, als de oever sneller dichterbij komt dan je dacht en de boot niet zo gemakkelijk de hoek om kan draaien, gewoon het zeiltje verder uit te vieren. Desnoods tot het evenwijdig met de neus staat, aan de verkeerde kant van de mast dus. Het Flat Earth-zeiltje kan dit ook dankzij de stagen die onder de giek aan de mast vast zitten. Ik weet dat er en hoop discussie is onder kajakzeilers over een volledig roterende giek, maar voorlopig hou ik het maar zo. </span><br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Zeiltje kan helemaal naar voren draaien</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Rest nog de vraag hoe ik de mast weer plat krijg. Dan blijkt tot nu toe eenvoudig te kunnen door je peddelblad onder de giek te houden en met een snelle ruk omhoog. Bij voorkeur natuurlijk tegen de wind in. Mocht de wind de mast vastdrukken tegen de pijp dan kan je met je peddelblad de mast een beetje extra naar voren duwen tot ie vrij omhoog kan glijden uit de pijp.</span><br />
<span style="font-family: "arial" , "helvetica" , sans-serif;">Overigens zorgt de giekneerhouder ervoor dat de mast bij het verlaten van de pijp niet als een kite honderd meter wegwaait. Deze lijn loopt door een ring laag op de mast en dan ook nog door een dekoogje vlakbij de mast zodat de mast niet ver weg kan vallen. Je hoeft alleen de neerhouder iets te vieren in het klemmetje zodat er ruimte ontstaat voor de giek en mast om omhoog te komen uit het gat. Nog een tweede voordeel is dat een strak gezette giekneerhouder ook de mast belet om ongewenst uit de pijp te glijden, met name tijdens het eskimoteren.</span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Het opbergen gaat volgens de gebruikelijke methode: ik steek de mast door een rubber stuk slang voorop mijn dek (bij gebrek aan een vast mastvoetje), vouw het zeiltje in en span er bij de kuip een stuk elastiek over. Klaar is kees. </span><br />
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<span style="font-family: "arial" , "helvetica" , sans-serif;">Kan ik de doorgestoken mast aanbevelen? Nee! Het is een hoop werk en geëxperimenteer en een apart tuig maken is ongeveer net zo duur als een complete set kopen. De pijp kan in de weg zitten bij het volstouwen van je voorcompartiment. Gebruik dan alleen lange, smalle spullen die er nog langs kunnen schuiven, zoals je tent. Een kanokennis van mij bij Never Dry in Rotterdam vaart met een Tiderace met zeer bolle kop. Hij vindt zo'n pijp bezwaarlijk omdat hij dan al die stouwruimte voorin niet goed denkt te kunnen benutten. Maar ja, als het zaakje eenmaal werkt, heb je wel een erg strak dek zonder twee zijstagen, een voorstag noch een achterstag. Dat ruimt aardig op. En zeer geschikt voor lange mensen met lange peddelslagen.</span><br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Het eindresultaat. Het klauwlijntje aan het einde van de giek moet ik nog verlengen</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="font-family: "arial" , "helvetica" , sans-serif;"></span><br /></span>
<span style="font-family: "arial" , "helvetica" , sans-serif;">Nog een laatste pleidooi voor een doorgestoken mast en dus een iets moeizamer opzetten en strijken is dat het niet vaak voorkomt dat je pas onderweg besluit een zeiltje op te zetten. Meestal doe je dit aan de kant, met in acht name van de windverwachting. En waait het stevig, dan kan ik altijd nog besluiten om het Falcon-zeil te verwisselen voor een iets vergevingsgezinder Flat Earth-zeil. Die wissel duurt hooguit twee minuten. </span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifR2mb7PDbaFMuBNlRxdKo0G_JsU8ufFFOmKjK6ZPEo9aqvAPgK27YEBXS8Oxj-kKHwI2FReXniYW93FT8fzZb9ZLDVAxTAvzb3VsSKWWRX0bef6QeK_Yn-VxGNa5bxH0rn_eSG7hyfMny/s1600/Zeilhoogtes+Flat+Earth+en+Falcon.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="992" data-original-width="1284" height="492" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifR2mb7PDbaFMuBNlRxdKo0G_JsU8ufFFOmKjK6ZPEo9aqvAPgK27YEBXS8Oxj-kKHwI2FReXniYW93FT8fzZb9ZLDVAxTAvzb3VsSKWWRX0bef6QeK_Yn-VxGNa5bxH0rn_eSG7hyfMny/s640/Zeilhoogtes+Flat+Earth+en+Falcon.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-family: "arial" , "helvetica" , sans-serif; font-size: small;">Links: Het Flat Earth-zeiltje op mijn zelfgemaakte mast, geschikt voor een Falcon-zeil. Het zeiltje staat te hoog. Rechts: het Falcon-zeil op dezelfde mast. Onder: Het Flat Earth-zeiltje op de zelfgemaakte mast maar dan verlaagd. Zo moet het worden. De klauwlijn is niet origineel, maar zit er toch op vanwege de speciale manier van opdrukken van de mast (zie tekst hierboven).</span></td></tr>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"></span>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-14879891689859364662019-03-07T06:40:00.002-08:002020-03-15T13:31:29.460-07:00Ja hoor, een kapseis!Ja hoor, ik ben omgeslagen. Met een Falcon-zeiltje. Wel een beetje mijn eigen schuld. Heel erg mijn eigen schuld. Helaas geen foto's want het gebeurde in het pikkedonker.<br />
Op mijn vaste clubavond van Never Dry aan de Kralingse Plas in Rotterdam was op 6 maart 2019 alleen Iede mijn vaste kameraad aanwezig. Hij wilde wel varen, ik ook een beetje, maar ik was net hersteld van een gemene bronchitis dus riep ik op voorhand dat ik het 'rustig aan' wilde doen. Misschien dat ik daarom mijn Falcon-zeiltje opzette. Dan hoefde ik niet zo hard aan de bak.<br />
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<b>Laveren</b><br />
De wind was draaierig, viel soms helemaal weg en stak dan weer even op met eind windkracht 3. Eerst een stuk op halve wind, toen voor de wind, weer halve wind en het laatste stuk tegenwind. Ik maakte aanstalten op mijn zeiltje plat te gooien toen Iede uitdagend begon te roepen dat hij mijn blogs had bestudeerd en dat hij nu wel eens wilde zien hoe ik zou laveren tegen de wind. Dus vooruit, in het pikkedonker draaide ik op goed geluk van de wind af. Ik zag geen klap, dus evenmin of mijn zeiltje wel goed stond. En toen gebeurde het...<br />
Een flinke windstoot kwam opeens van opzij, terwijl ik mijn zeiltje waarschijnlijk nog te dicht had staan vanwege de aan-de-windse koers. Een klassiek probleem waarvoor je altijd moet oppassen. Mijn Capella helde vervaarlijk over en ik dacht nog 'Jongen, je hebt nog een beetje bronchitis, je hoeft dit gevecht niet te leveren'. Dus besloot ik de schoot los te gooien. Dat deed ik iets te snel met als gevolg dat de hele santekraam nog vervaarlijker de andere kant op helde. Ik deed nog een slappe poging om te scullen (waarom geen hoge steun???) maar voelde al dat het onvermijdelijke ging gebeuren. Ik vond het eigenlijk wel best. Op de een of andere manier had ik wel de behoefte om eens lekker om te gaan. En zo geschiedde. Dankzij het zeil dat nu plat op het water lag, leek het of ik even op m'n zij bleef hangen. Daarna zakte ik heel langzaam verder naar beneden. Opeens herinnerde ik mij dat ik mijn brillenkoordje niet droeg. Dus drukte ik onder water met een hand mijn peperdure, gloednieuwe bril vast op mijn hoofd. En dus kwam ik niet toe aan een rol of zoiets. Het werd een wet exit.<br />
<br />
<b>Puntje</b><br />
Iede vond het jammer. Ik had gewoon moet kloppen op de boot, dan had hij mij een puntje gegeven. Hij was immers vlakbij. Maar ja, ik vond mijn bril nog belangrijker. Iede wist zowaar de hele boot met zeiltje en al half terug te draaien om hem enigszins te legen. Hij kon natuurlijk alleen het verre puntje pakken zodat het zeil ongehinderd omhoog kon draaien. Na nog wat gehannes belandde ik weer in de boot met een heel hook. Iede vond het maar 'zo zo' gaan. 'Je hebt dat toch geoefend?' Ik merkte dat ik eigenlijk geen zin had om uit het water te komen. Ik vond het best lekker om even te ontspannen. M'n zwemvest drukte wel tegen m'n kin, ik had een Long John met goedkope anorak van € 34 (bij Declathon) aan, maar voelde me niet echt koud worden. Een wonder want later ontdekte ik dat ik de rits van mijn Long John open had gelaten om mijn pens te ruimte te geven.<br />
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<b>Leuk</b><br />
Enfin, spatzeil weer dicht, zeiltje alsnog plat en varen maar weer. Nu recht tegen de wind in zoals het hoort. Iede had het ondanks zijn strenge toon best naar zijn zin. Hij vindt het leuk om mensen uit het water te vissen. Volgens de juiste methoden. Het was inderdaad een goede reddingsoefening in het pikkedonker. 'Mijn week is weer goed!' schalde hij over het water.<br />
<br />Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0tag:blogger.com,1999:blog-6166208555826485754.post-5221254881075661532019-03-04T11:53:00.003-08:002020-03-10T09:35:23.467-07:00 Nice to know ofwel kajakzeilen voor nerds<br />
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Wie
lekker wil kajakzeilen zonder gedoe, zou deze blog ook net zo lekker over
kunnen slaan. Wie meer wil weten over de details van het kajakzeilen kan hier wel
terecht. Ik heb nog niet alle antwoorden, maar kan wel duidelijk maken hoe ver
je kan gaan met de details. Net als wedstrijdzeilers die werkelijk overal aan
willen denken om 1 seconde eerder over de finishlijn te varen. Voor
kajakzeilers geldt echter: ‘nice to know’. Zeker niet ‘need to know’. Tenzij je
een wedstrijd wilt houden, maar dan zou ik een echte zeilboot kopen (met
peddeltje voor de zekerheid).</span></div>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Het
meest intrigerende onderdeel van (kajak)zeilen voor de echte nerd is de
aan-de-windse koers. Om schuin tegen de wind te varen, komt het aan op een goed
zeil en voor kajakvaarders natuurlijk de mate van meepeddelen. Het moge
duidelijk zijn (zie ook ‘Kajakzeilen voor dummies <st1:metricconverter productid="2’" w:st="on">2’</st1:metricconverter>) dat een jacht prima
aan-de-wind kan zeilen, maar dat een zeilkajak dit minder goed kan en wat hulp
nodig heeft van de peddelaar. Waarom?</span></div>
<span style="color: white;"></span><br />
<ol start="1" style="margin-top: 0cm;" type="1">
<li style="font-family: "arial"; font-size: 10.5pt; font-style: normal; font-weight: 400; margin: 0px;"><span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Het
zeiloppervlak is naar verhouding een stuk kleiner dan dat van een jacht, rekening
houdend met het grote verschil in waterverplaatsing.</span></li>
<li style="font-family: "arial"; font-size: 10.5pt; font-style: normal; font-weight: 400; margin: 0px;"><span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Een
zeilkajak mist een fok voor extra windstroom en dus zuigkracht achter het
zeil.</span></li>
<li style="font-family: "arial"; font-size: 10.5pt; font-style: normal; font-weight: 400; margin: 0px;"><span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Een goed
kajakzeil loost behoorlijk wat wind om omslaan te voorkomen. Dit gaat ten
koste van de snelheid bij met name aan-de-windse koers.</span></li>
<li style="font-family: "arial"; font-size: 10.5pt; font-style: normal; font-weight: 400; margin: 0px;"><span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">De drift
speelt geen rol dankzij de enorme lange waterlijn en geringe breedte van
een kajak, afgezet tegen de geringe zijdruk van een zeiltje. Een kajak is
in feite al een enorme scheg. De drift is te vergelijken met die van een
zeilschip met kiel of zwaarden.</span></li>
</ol>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Hoe
dan ook, een peddelzeiler moet meepeddelen bij een scherpe aan-de-windse koers
(zeg ongeveer 35 graden van de wind af), wil hij harder gaan dan pakweg <st1:metricconverter productid="3 kilometer" w:st="on">3 kilometer</st1:metricconverter> per uur.
Niet hard meepeddelen, maar wel wat. Zo kan hij snelheden behalen van 6 tot <st1:metricconverter productid="10 kilometer" w:st="on">10 kilometer</st1:metricconverter> per uur.</span></div>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">En
juist hierin zit de magie. Er bestaat het vermoeden onder ervaren kajakzeilers
dat de toegevoegde snelheid van de rustige peddelslagen plus de stuwkracht van
het zeil tezamen meer snelheid opleveren dan de optelsom van de afzonderlijke
krachtbronnen. Er zit blijkbaar een mysterieuze ‘derde kracht’ verborgen in de
kajak. </span></div>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Het
schijnt dat motorzeilers hetzelfde meemaken (motor + zeil = meer dan alleen de
motor of alleen het zeil bij elkaar opgeteld). </span></div>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">De
verklaring moet zijn dat het zeil beter presteert als het wordt geholpen door
een motor of peddelaar. Ik bedoel dus nog meer geholpen dan alleen door de
extra snelheid vanwege een extra krachtbron. Kennelijk krijgt het zeil meer
‘lift’ waardoor je meer cadeau krijgt dan alleen je toegevoegde peddelslagen. </span></div>
<span style="color: white;"></span><br />
<div style="margin: 0px;">
<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Iedere
expert zal dit bevestigen, maar ik moet eerlijk zeggen dat ik het zelf niet
goed kan inschatten. Ik denk dat het waar is, maar kan het nog niet bewijzen.
Ik heb wel eens een stukje drie keer aan-de-wind gepeddelzeild met een
gps-meting – eerst alleen peddelen, dan alleen zeilen en daarna peddelen plus
zeilen – maar dat is nog geen bewijs voor de geheimzinnige derde kracht. Ik zag
wel extra snelheid op de gps in de derde ronde, maar dat kan ik ook onbewust
zelf hebben gedaan, hopend op een gunstige uitslag. Vertrouw jezelf nooit!</span></div>
<span style="color: white;"></span><br />
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<span style="color: white;"></span><br /></div>
<span style="color: white;"></span><br />
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">En
zo kwam ik op het idee op een experiment te houden met een betrouwbare
krachtbron, de motor. Ik wil drie keer dezelfde koers aan-de-wind varen met een
motorsailor. Met motor, met zeil en daarna met beide. Ik plaatste onlangs een
oproep op zeilersforum.nl, een van de meest actieve fora voor totale zeilnerds.
De vraag luidde, vrij vertaald, ‘Wie wil mij meenemen op zijn motorjacht voor
dit experiment?’ Dat heb ik geweten. Niemand meldde zich als vrijwilliger, maar
velen toonden wel betrokkenheid door met zeer uitgebreide adviezen, analyses,
meningen en formules te komen met de nodige vectorberekeningen, polaire schema’s
en de nodige hydrostatica. Ik was zwaar onder de indruk van de enorme kennis
onder zeilers die net als ik ook maar een hobby hebben. </span></div>
<span style="color: white;"></span><br />
<div style="margin: 0px;">
<span style="font-family: "arial"; font-size: 10.5pt; margin: 0px;"><span style="color: white;">Ik
zal de discussies hier niet over doen, de thread die ik begon dijde uit tot wel
een kilometer lang, maar ik heb wel conclusies getrokken. Die heb ik voorgelegd
aan iedereen, zonder verder commentaar dus ik neem aan dat ik de juiste
conclusies heb getrokken. Ik zal er hier een paar delen.<span style="margin: 0px;"> </span></span></span></div>
<span style="color: white;"></span><br />
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<span style="color: white;"></span><br /></div>
<span style="color: white;"></span><br />
<div style="margin: 0px;">
<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">1.
Aan-de-wind peddelzeilen betekent dat je door het meepeddelen meer wind langs
je zeil laat gaan. Je creëert 'je eigen wind'. Dat is goed.<br />
<br />
2. De schijnbare wind kruipt echter met iedere peddelslag verder naar voren,
waardoor je in feite nog scherper aan de wind peddelzeilt, ook al hou je keurig
koers ten opzichte van de werkelijke wind. Er komen plooien in het voorlijk (te
veel wind komt achter het zeil). Dat betekent krachtverlies van het zeil en dus
vertraging van de bootsnelheid. Dus hoe harder je meepeddelt, des te minder het
zeil nog meedoet. *</span></div>
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<span style="font-family: "arial"; font-size: 10.5pt; margin: 0px;"><span style="color: white;"><br />
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3. Door extra peddelkracht creëer je eigen wind, wat meer zijdelingse druk van
het zeil oplevert maar daardoor krijg je ook meer laterale weerstand over de
hele lengte van de kajak. De kajak wordt zo een varende bandschuurmachine, wat
de snelheid weer omlaag brengt. Dit geldt met name voor lichte wind. Bij
hardere wind is het extra zeilrendement misschien groter dan het
snelheidsverlies door meer laterale weerstand.</span>
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<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">*
Om dit te begrijpen, is het goed om te weten wat schijnbare wind is. De invloed
is namelijk behoorlijk groot.</span></div>
<span style="color: white;"></span><br />
<div style="margin: 0px;">
<span style="color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Ligt
een kajak stil dwars op de wind, dan komt de wind ook echt van opzij. Ga je
peddelen, dan zal de wind ook een beetje voor voren komen. Zou je een vlaggetje
hebben in de top van je zeiltje, dan wappert dit vlaggetje eerst gewoon mee met
de zijwind. Ga je snelheid maken, dan zal het vlaggetje iets naar achteren
draaien. Dit effect is de schijnbare wind. Deze schijnbare wind heb je op
iedere koers. Lig je stil met de wind in de rug, dan zal de kajak al wat
vooruit worden geblazen. Ga je meepeddelen, dan zal de wind steeds zwakker
worden, totdat het windstil lijkt te worden. Je peddelt dan net zo hard als de
wind waardoor je dan geen enkel profijt meer hebt van de wind. </span></div>
<span style="color: white;"></span><br />
<div style="margin: 0px;">
<span style="font-family: "arial"; font-size: 10.5pt; margin: 0px;"><span style="color: white;">De
term ‘schijnbaar’ is een beetje verwarrend omdat de heersende wind op en rond
de boot helemaal niet schijnbaar is. Deze wind is eigenlijk op dat moment de
werkelijke wind waar je mee te maken hebt, ook al is de officiële windrichting
van het KNMI anders.<span style="margin: 0px;"> </span></span></span></div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqMijYIc0doeitEkemq_4BeQvieprUutmGkXAXqaZnuNjO4NXqgPN_A3WszFMrl6g7LYq1phqX40hvHLIhEmyVfcURxR5uj0-XLN3VT8W2iLY3Bk1JxYSPtzU7uftn-zEpfnXo_kwk9JHE/s1600/Schijnbare+wind+hoekverandering.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" data-original-height="992" data-original-width="1284" height="494" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqMijYIc0doeitEkemq_4BeQvieprUutmGkXAXqaZnuNjO4NXqgPN_A3WszFMrl6g7LYq1phqX40hvHLIhEmyVfcURxR5uj0-XLN3VT8W2iLY3Bk1JxYSPtzU7uftn-zEpfnXo_kwk9JHE/s640/Schijnbare+wind+hoekverandering.png" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">De dramatische gevolgen van schijnbare wind. Hier een voorbeeld uit de zeilerij, met veel te hoge bootsnelheid maar dit maakt wel duidelijk hoe groot het effect is, ook bij lagere snelheden. AWA = Apparant Wind Angle (schijnbare windrichting), TWA = True Wind Angle (werkelijke windrichting). Bij een snelheid van 18,5 km/uur op halve wind zou de wind dus maar liefst 45 graden opschuiven naar voren.</span> <span style="font-size: small;">Bron: Zeilersforum.nl en SailAid.</span></td></tr>
</tbody></table>
<br />
<span style="color: white; font-family: "arial";">In wezen is dit hele verhaal natuurlijk puur theorie, leuk voor nerds. In de praktijk is de zoektocht naar de mysterieuze 'derde kracht' een beetje onzinnig. Om te beginnen peddel je aan-de-wind met een zeiltje nooit precies hetzelfde als zonder zeiltje, zeker niet als het flink waait. Je moet met een zeiltje meer op je balans letten, af en toe roer geven en soms een boogslag maken. Bovendien zal de 'derde kracht' al gauw verdwijnen in de golven die schuin van voren komen en de kajak soms even behoorlijk afremmen. Hoe harder je gaat, des groter de impact van de golven. </span><br />
<span style="color: white; font-family: "arial";">Verder is het effect van de schijnbare wind op een aan-de-windse koers nog desastreuzer dan op halve wind. Op halve wind heb je nog wat speelruimte met een wind die verder naar voren kruipt. Je zou dan je zeiltje iets verder kunnen intrekken om tegemoet te komen aan de scherpere wind. Maar als je al scherp aan de wind vaart, heb je die speelruimte niet. Je zeiltje staat al ver ingetrokken. Je kan dan maar beter niet te hard peddelen om te voorkomen dat de schijnbare wind bijna recht van voren komt. En daarmee vliegt het voordeel van de zogenaamde 'derde kracht' zo uit het raam!</span><br />
<span style="color: #b08000; font-family: "arial";"><span style="color: white;"></span><br /></span>
<span style="color: white; font-family: "arial";">Maar ja, ik wil toch weten hoe het zit met die 'derde kracht' en zal daarom het experiment wel houden. U hoort nog van mij.</span><br />
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<span style="color: white;"></span><span style="color: #005000;"></span><span style="color: #b08000;"></span><span style="color: white;"></span><br />
</span><span style="background-color: white; color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Al met al is alleen de eerste conclusie hoopgevend voor de aanname dat
peddelkracht plus zeilkracht tezamen meer snelheid oplevert dan de
afzonderlijke bronnen bij elkaar opgeteld (bij aan-de-windse koersen). De extra
lift van het zeil wordt echter behoorlijk ondermijnd door de laatste twee
conclusies: de schijnbare wind die steeds verder naar voren kruipt tot voorbij een acceptabele aan-de-windse koers en de zijdelingse, schurende weerstand in het water. </span></div>
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<span style="background-color: white; color: white; font-family: "arial"; font-size: 10.5pt; margin: 0px;">Tjd voor het experiment met een motorzeiler om dit te onderzoeken. U hoort nog van mij!</span></div>
<b></b><i></i><u></u><sub></sub><sup></sup><strike></strike><i></i>Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com2tag:blogger.com,1999:blog-6166208555826485754.post-12682593895355386652019-02-18T11:00:00.001-08:002020-03-10T09:35:50.308-07:00Falcon zeil in lichte wind, Grevelingen<br />
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Grevelingen, 17 februari 2019, ten westen van de Hompelvoet op weg naar Ouddorp. Cameraman Adrian Iorgu. Peddelzeiler Berend Schilder, met Falcon-zeiltje. Windkracht 3 (bijna), Zuidzuidwest.Kajakzeilerhttp://www.blogger.com/profile/10186462982135227604noreply@blogger.com0