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Old 08-02-2009, 03:16   #1
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Hull CLR?

Hi, I need to design a jib that gives my boat a 15% lead to windward, to do this I need to know the CLR (center of lateral resistance) for my hull.
This isn't covered by any of the books I've read, I have reasonably detailed spec's for my boat, how do I work it out please?
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Old 08-02-2009, 23:05   #2
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Well, the best way would to be to have the hull in a hull design software. But you likely don't have that.

If you don't need to be precise to several decimal points, you could print the underwater hull shape from the sail plan onto a piece of card stock. Cut it out. Then balance it on the tip of a pin.

When you get it to balance, mark where the pin is. It will be approximately at the CLR.
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Old 09-02-2009, 10:09   #3
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Ah ok, that makes sense, thanks.
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