It sounds like you guys are saying that it's overkill to put a 50 cc gas engine on a 1/4 scale plane in order to obtain 3d performance. A case in point is the GP PW extra. Many say this plane requires a 50 cc engine to have evough authority for 3d flying. It sounds like you guys are saying this is ridiculous.
I just bought this plane and haven't decided on an engine yet. I want power for 3d performance. However, I don't want to spend more than is necessary for unneeded power.
Is 2:1 power to weight truly unnecessary?
Dave