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Sail & Rigging - Gennaker for Swan 38 |
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Join Date: 30 January 2007
Posts: 25 |
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Gennaker for Swan 38 Hi all, I would like to know good measures for a Gennaker for my Swan 38 Kidogo III. Any informations about this is appreciated. Thanks, Enzo
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Join Date: 16 October 2011
Posts: 5 |
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Dear Enzo, 1 - Having an IRC or ORC Rule certificate, make it as big as the largest Spinnaker you are already "paying for". Compared to a generic simmetrical Spinnaker, a good Asymmetrical can be used in more wind because If speed is not an important factor, Gennaker can be reduced in area for easier handling. Luff length is related to the distance available between Halyard full hoisted and Tack desired position above Deck. Having set the three external boundaries, the Mid-Girth can be handled separately because it depends by sail fullness, Luff projection forward and degree of Leech Twist (sideways vertical curvature). Compared to a simmetrical Spinnaker, designing a Gennaker the last two items can be controlled independently. This can make a real difference, because they are genereting the amount of power, while setting the direction where is aiming. Racing boats with only Asimmetrical kites may have a family of different sails available, often with similar boundaries, but very different mid-girths to match smaller or greater wind pressures. Cloth weight is also an important factor, related to area and fullness. When one only gennaker is desired on board, a good compromise can be found, but I don't see why it should be that much smaller than a traditional simmetrical Spinnaker, partucularly if most handling related issues are nicely managed with an appropriate hoisting and dousing sock device. |
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