RE: RCAero JC Engines & YDA Engines
Clivemc That is much better lol. From the specs you gave on your engine it seems to be that if you had installed the other prop you would have gotten close if not better results. It is always had to just jumping from prop to prop and what the exact rpm drop or gain would be. However throwing a 18x6 at 8,500 RPMs is very respectable in my opinion. If you installed the other prop I believe that the motor would still be producing a health RPM level.