RE: O.S. 55AX opinions
I had one in a P-51 Mustang PTS. Plenty of power and would do about anything I wanted it to. I agree with one of the earlier posts about the mid to upper range. Top end doesn't appear to be what your looking for so you should be fine. Hands down, without question the best prop for this motor was the 12-6. Best combination of power and speed regardless of how I was flying it. Good luck!!