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Any formula you use will give you a "theoretical" hull speed. As some boat designer named Bob Perry told me once, the 1.34 x the sq. root etc. will get you in the ball park for most cruising boats.
SailorMitchSailing winged keels since 1989.
1.20.09 Bush's last day the end of an error !! Hopefully we still have a constitution and economy left by then.
"Compassion and tolerance are not a sign of weakness, but a sign of strength." The Dalai Lama
good planets are hard to find-- a song by steve forbert
I have but one lamp by which my feet are guided, and that is the lamp of experience. I know no way of judging the future but by the past.-- Patrick Henry.