Due to ventilation problems, I went from a 3 blade to this 4 blade of the same diameter and pitch. Mid-range cruise showed great improvement. 3 blade was 3700 rpm at 27 mph and 1.6mpg. The 4 blade is 3400 rpm at 28 mph and 2.3 mpg. I did lose 300 rpm and 4 mph at WOT. But the ventilation is gone!P.S. Don't buy a prop from Kart-it, you may get a used one. (I did)
Rating:
[5 of 5 Stars!]