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Cat board angle

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On smaller cats with accommodation in the hulls the presence of a dagger board case is a serious obstacle. Hence it is angle one way or the other to get it out of the way. This means there is a vertical force component when sailing. The other day I amused myself by making an approximate drawing of my boat and calculating the forces:


The green arrangement is what I have on my boat. Ease of handling is an obvious advantage.

The numbers show a non-trivial increase in righting moment for the red arrangement and it is for free (I think) -- a compelling argument for the red version.



My boat: http://hem.bredband.net/b262106/

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