Thanks Rick ! Been looking all over the web to figure why my thinking was incorrect (up to a point ... of max stability :-)).
So what I was doing incorrectly was to calculate the rolling forces/moments where the CB/metacenter moved all the way to leeward, at the angle of maximum stability. (same thing I used for calculating maximum forces in the beams).
So I understand now foil lift help reduce heeling and please correct me if I am wrong but up to when the metacenter has moved past the center of lift on the foil, it's lift then start to help heel the boat.
I guess this is why some foilers are so "snappy" when approaching the limit ? But as always some exeptions, one being when putting the foil all the way out of the boat to lw or special curved shape ... not simple.
Starting to like big lifting foils less and like Rob's kite more !
And now wondering about canted masts ... Vestas sailrocket style.
Found this nice article for other novice whom's interested that explain basic stability in good details. (even if it is for mono, can relate to multi)
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Posted by: lucsimard@ymail.com
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