Thanks, All, for your replies. [sm=thumbup.gif] I had a Sig 40-LT Kadet with an OS 46-AX that turned an 11x6 MAS prop, and that plane got airborne off grass in probably 20 feet. That combo really performed well, last flights spent trying knife edges which weren't great but were there. I had planned to experiment with various props on it but, unfortunately, a tree jumped up and grabbed it a few days ago. So I'm getting a 40-sized stick and a 70 4-stroke, and I'll try various props on that.
Regards to all,
Bidwin [sm=cool.gif]