The "best" prop is depends on your plane and what you do with it.

If you fly a GP Patriot, with a high RPM tuned exhaust system and hope for 110-120 MPH in level flight, you may want to use a 9x8, or even an 8.5x9 pylon racing prop.

If you have a sport plane, an 11x6, or an 11.5x6 would be your bet.


It depends on the type of pattern ship that you have.

I personally recommend the Bolly 11.5x6, for all around flying. It gives you good speed AND great thrust. I use it with my WM T-34 and it pulls it straight up and out of sight.
RPM is at 12,200, with a Tower muffler.