Did some rough calculations on the Harryproas stability at 90 degrees.
Empty, a Harry is stable on its side but not by a large margin.
Probably the resistance of the masts as well as the bouyancy would stop
it turning over. Loaded, IFF the loads are well placed the situation
improves. An extra 40kg or so bouyancy at the masthead and there is big
improvement. Possibly soft urethane foam sewn ito the top panel of the
sail would do. With wing masts the margin is much larger.
Yahoo! Groups Links