I think you need bigger planes to do 3D. I like the smaller planes for hovering but they dont do much 3D manuvers. What do you think. Well I think you need at least a 1/3 scale or large with a powerful motor.
Also a good engine for a UCD is a O.S. 91 2 stroke. I think that is a good motor for it. Except for the fact the muffler is to heavy. Some Motors when you get bigger the more weight. What engine do you prefer.www.flyinggriffins.org [email protected]