Originally Posted by
Joystick TX
I think the plane would "fly" with the 10 cc engine, but it would not be much fun and power would be marginal. A cub has a lot of drag and if the plane is built with the long wing, it may fly close to the edge of the stall speed, which will take a lot of concentration. It would be a little better with the clipped-wing configuration. A 15 cc engine would be about right and a 20 cc engine would give plenty of reserve power.
Re: the Evo, if the weight could be kept into the 8lb range, I think it might be fine? Heavier though, especially up into the 10-12lb range, I agree with Joystick. Too heavy to be much fun? You'll spend the majority of your flight time managing your flying speed. Possible, but not a very relaxing way to fly.
Too, the fact the 20cc would weigh the same or less than the 15 would be a deciding factor for me between those options.......