RE: Ultra Stick 120[not Lite]and Ryobi 31cc
I have the US 120 (old style) with a Quadra 35 on it. Flew great at 1/2 throttle, but when I opened it up lost the plane due to flutter.
Dumb mistake on my part too light of linkage on the elevator. But while I was flying it did some loops, rolls, ect.. and the balance seemed great and plenty of power. I'am in the process of a rebuild now.
Excuse me...I am running a Master airscrew 18x6 on the Quadra.