weather helm

[gmeyerga]

Why does a (my?) 1982 H27 (tall rig - deep draft) on a reach under a 110% jib alone(i.e. no main) round up in a strong gust. I would have expectedthe bow to be driven off to leeward. Is the whole hull in fast motion an airfoil in a strong gust?ghm

 

[Gunter Meyer]

vectors in 3-D

Mr. Roosa,thanks for your detailed clear explanation.It explains nicely why I don't round up going towindward under jib alone. Gunter Meyer