I don't want to worry you guys but the best guess about the K7 glider that crashed at Strubby last year was that the roll (and reversal) initiated hit the wing's primary natural frequency and caused the failure of the internal structure. This is a known phenomenon that has occured on powered aircraft before and that can occur below Vmanoeuvre (in fact can happen below Vanything)
Fly carefully
Last edited by Incipient Sinner; 19th May 2005 at 05:38.