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Old 07-12-2006, 05:44 PM
rayaldridge's Avatar
rayaldridge rayaldridge is offline
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low-aspect foils and tacking

Am I correct is assuming that tacking a boat with low-aspect ratio foils (all else being equal) will be more certain than tacking a boat with high-aspect foils, due to the greater stall angles of the low-aspect foils?

I ask because I'm working on a small catamaran design in which high speed is not the primary goal. I assume the dominance of high-aspect foils in racing catamarans is due to their better lift-drag ratios, but in my case, I want a well-behaved boat. Is this a possible design trade-off?

One more clarification: I'm not talking about LAR keels as in some production multis. I'm talking about aspect ratios under two in conventional transom-hung rudders, and perhaps a more conventional high-aspect ratio daggerboard.

Ray
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