> Columbia 22's, Columbia 7.6, Cal 25, Hobie 14, Hobie 16's and
> Sovereign 13's
> also have rudder shimmy and hum at speed...
I've had a vibration in my P19 rudder at high speed under sail from time to
time, but tighening the pivot bolt generally helps out here. Sometimes it
has been a rapid enough vibration to actually hum.
-EJ P19 #461 Bothell, WA