ORIGINAL: Diablo-RCU
If it's a 3W or DA-100, I'd use a Menz-S 27x10 for 3D. Great pull, and quick acceleration because it's a light wood prop. The prop can be noisy in straight and level flight if you let it unload and rip. This prop will turn 6400-6700 rpm static on these engines.
I keep hearing about the Menz-s but have not tried one yet. Guess I need to get of my butt and order me one.
Thanks