Originally posted by OUTCAST
I think they may be a little less noisey because at the same RPM a larger two blade would have a higher tip speed than the smaller three blade.
Correct, in general they are quite a bit less noisy. My buddy went from 90 db on a 17x12 2 blade to a 15x11 4 blade and dropped the noise to 86 db, although it didnt have anywhere near the power of the 17x12
