Im building a Sig Midstar 40 and have not bought an engine for it yet. The plans call out for a 30 to 40 2 stroke,I was wondering if the 40 is going to leave it under powered flying off grass. I have an Avistar and had some problems getting off the grass, so i put a O.S.46FX on it and it is a rocket. I have a O.S. 40LA off my Avistar but if its going to be under powered just assume not to mount it.
Open for suggestions ---Thanks