Hi
I'm thinking about using the TT 91 4- stroke on my U Can Do 60.
Has anyone tried this? Or can anyone tell me about this engine?
Thanks

They are not here yet, however, Ace sent some 91's to my LHS on thursday and should be here tomorrow!
I got first dibs on one. Going to put an ultra thrust muffler on mine.

I have flown a friends plane that is set up this way. It seems to have plenty of power on 20%, but I did not do any 3D stuff with it. The owner just sport flys, likes to just flip around, no 3D. It is a heavy engine but I don't think he had any balance issues.