Wolflord:

I tested the master airscrew 3 blades and had the 14x7 and 15x7. They are both too small and have me over revving (10,500 and 9300 rpm). A couple pages back in the thread a master airscrew 16x8 had a static rpm of 8200, which in the air should unload to 8800-9000 which is about perfect. That is what I am going to use.