ORIGINAL: poppy2
Is there a 10.5 diameter prop? (10 and a half) I
Yes there is, and Bolly make 'em. But a 10.5 x 6 is still not what you want with that engine in a trainer.
11.5 x 5 Bolly is what you want. Purrrrfect for the AX trainer combo. 5" offers superior braking and acceleration, sits in the AX's power band, and is the best match for draggy trainer airframes intended to operate in a moderate speed envelope. Try it and you'll understand.