Jim

When I installed the Contra,I took your advise on the prop and gear selection because it made sense to me. Every body else was telling me to go to the larger props, This airframe is so big I knew the larger props would not be a good choice as I was able to fly the Single prop NUE setup without breaking on the speed controller.

after a few flights, I tried the larger prop combo 22" I think and while it pulled fine, it had too much drag on the airframe in moderate winds.
I hope to experiment some more but the 9:89 gears with the APC clones just worked fantastic all around. Good breaks ,good power /vertical or wind penetration, and very quiet. It`s gonna be hard to beat!

Bryan