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Kayak and Canoe Design Bulletin Board
Re: Hull shape and crispness of leaned turns
Posted By: Nick Schade In Response To: Hull shape and crispness of leaned turns (Jan Gunnar Moe)
Date: Thursday, 10 June 1999, at 10:30 a.m.
One thing that makes leaned turns effective is is can shorten the waterline length of the boat. By leaning the kayak, you put it on to it's "rockered" side instead of the less rockered bottom.
For this reason wide boats will tend to respond more to leans because they effectively have more rocker when they are leaned. However, they tend to be harder to lean.
> What follows is pure speculations, to be corrected if wrong:
> I would believe that leaned turns with 22" wide CLC North Bay XL will
> be crisper than with standard 20" wide and same length CLC North Bay,
> due to the more curved hard chines.> For same reason I believe that leaned turns with wider and shorter CLC
> Chesapeak 17 and Pygmy Arctic Tern will be even crisper, for the same
> reason.> Then again, believing that hard chines in back of hull is what is most
> important for crisp leaned turns, I could theoretically try to compare
> Arctic Tern with Chesapeak - if I knew their hulls well enough.> Well, I don't. But the Arctic Tern may seem to be slightly more
> symmetrical or even a tiny bit swede form, while Chesapeak may seem to be
> slightly fish form. So one should maybe guess that if rocker and sharpness
> of chines and cockpit placement relative to buoyance center were the same
> the Arctic Tern might carve sharper turns than the Chesapeak. But here I
> see that speculations dominate, so not even an unqualified guess will be
> given.> Well: Is crisp leaned turns that important? Probably not. I am just trying
> to increase my understanding about what design properties will give what
> behavior.> Jan Gunnar
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