Randy, what's the stuff covering the rear of the fuselage sides? It looks like balsa, but maybe 1/64" plywood? I remember Mark's Profile Impact being covered with balsa and light fiberglass (or CF?) and how it was proven to flex with Howard's mini-camera dingus. In that case, I suspect that having the pushrod & horns enclosed and on the fuselage centerline would have reduced the problem, but not totally eliminated it.
I used 1/64" plywood on one, and it made it stiff as a pine plank. Haven't heard anything from Mark lately...I hope he's ok. Steve
ah yes the Impact profile you love to hate LOL,, yes the fuse was the wiggly sort, which I remidied with Flap strakes,, really really long flap strakes,,
Steve, Im still kicking, assuming contests are held, I will be there, I am finally getting caught up financially and physically after all the doctors are done doing their ,, well they are done, so, on we go..