I just red the thred on "Smiple questions", having dun a search for "canted hulls" : As usual, lots of interesting opinions, mostly diametrically opposed. -Bill says it might not be advantageous, I can understand the theory he puts behind his opinion, which is a first for me. I would tend to agree with him based on what I`v seen, especially going downwind with the kite up - I can push the boat much harder if it`s heeled over quite a bit, the daggerboards provide lift, as does, I believe, the fact that the leeward hull is pressing it`s leeward side into the water, and since the side of the hull is curved it acts as a lift-producing device itself. -Darryl says it works, especially for barges, and cats should be the same, as long as the boards cant outward & are toed in to REDUCE DRAG when sailed flat. Makes no sense to me, I`d imagine that when sailed flat daggerboards & rudders that point inward would be like sailing with the handbrake on. I`d be willing to try it, but only if I understood why. -John Pierce (in a private conversation), says canted hulls work on the Stealth, but for a different reason that would unlikely work on my boat, but that I should try it out anyway. Makes sense, practical testing gives different answers to theory most of the time anyway. Question is, how much of what ? -Darryn says he sailed against a Mosquito that had canted hulls and it had no problem sailing away from the rest of the fleet. Now I`m interested, but can`t get any more information on that particular incident. (First real-world account based on experience I could find.) Unfortunately Darryn now sails a Laser, probably doesn`t log in here often, and doesn`t answer private messages as a result.
Back to Darryl`s theory : If you cant the hulls by, let`s say 7 degrees, the amount I think I`d need based on preliminary sketches I`ve done. I would keep the hulls parallel, but that`s just me, I reckon if both hulls are pointing at a point one-third of the boatlength forward of the bows, both hulls are trying to get to the same place, so you`d have more drag, not less. (I just drew a sketch of this and it CAN`T work !!)If anyone can explain this in Smiple terms I`d appreciate. Unfortunately the thread then turned direction and became a discussion in Inter 20/17/18 daggerboard design, which, while I found interesting, I`m not likely to apply to my possible experiment, which is why I thought it better to start another one. My interest would be in canting the hulls, and keeping the daggerboards perpendicular to the hulls, so they are both canted, not in having upright hulls with canted boards, since that would be a costly exercise. Any suggestions ?
