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Intro [2 Attachments]
¿ªÔÆÌåÓýBernd:
??? ??? What I was not understanding is that the wishbone and gaff are permanently attached at the masthead.?? Your photo clearly shows this to be the case, and also shows the sail furled to the mast, rather than the usual? method of furling to the boom on a mainsail.?? The wishbone & gaff here are clearly stayed so that they cannot swing as the boom swings, which would seem to enforce a twist.? The head of the sail is obviously drawn out to the wishbone by a control line through a block, and I would assume this line to be pretty important in controlling sail twist.?? The wishbone / gaff combination is similar to a jib crane arrangement, and clearly the wishbone allows for the head of the sail to be slacked a bit to come at least partially in line with the boom.?? I'd love to see this rig sailing in real life.?? I can only imagine the mess if the furler jammed and failed to work, but that's never pretty, and invariably happens at the most inopportune moment.?? Another question that comes to mind is how is a sail cover installed? ??? I also live in a very remote small town with a current population of 7 people, and the same number of dogs.?? Fortunately for us, a main fiber optic cable passes through here, and we have a telephone exchange sitting right on it, and so have superb internet.??? The biggest problem here is extremely unreliable electricity with outages ranging from 12 hours to 24 hours much more common than they should be.? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? H.W. On 11/27/2017 07:40 AM, Bernd Kohler Bernd@... [k-designs] wrote: ?
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H.W.
On the Pelican we had a sort of gooseneck fitting to control the twist. On the KD 860 and the ECO 75 the mast rotates to control the twist. Yes there are also control lines to control the wishbone. This is in both version enough to control the twist in the sail. Because we use no Aluminum profile over the stay, the sail can be lowered like any normal main sail. In all the years we have had never a furler failure. I see no reason why the furler should jam. This problem from jamming mainsails is a problem when you have to roll the sail inside the mast. Then the mostly full cut main sail jams in the middle (because to much material form in this region) and yes, you have a problem. Multihulls have anyway less problems, because the corde to depth of a monohull main is normally 6 to 8 %, wheres 4 % is the maximum for fast multihulls. For a cover you can have a sleeve with a long zipper which you can set when the sail is furled. Lucky you with a fast Internet. If there is some wind, and it is a region with much wind power failure is also a very common occurence here.? Bernd |
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