prop spinning too fast?
Do you believe that it is possible to actually get a prop to spin to fast i got to thinking about the fact that a stock jett turns 18k nelsons have been known to turn 3?k do you think it is possible that were simply spinning props too fast that maybe packing the rpm down would maybe increase speed
7.4(pie) = 23.235 (inches per revolution)
23.235 X 32 000 = 743552 (inches per minute)
743552/12= 61962.6667 (feet per minute)
61962.6667/(1087)60 = mach#
61 962.6667/65 220
So the tip of the prop is at a speed of mach .95 which is normally considered to fast because the airflow has a hard time staying with the contour of the prop.
“the speed of sound is 331.3 meters per second (1,087 feet per second) in dry air at 0 degrees Celsius (32 degrees Fahrenheit)”
so without looking at the engine side of this (ie tune pipes and such) could it be that speed could be gained by dropping the rpm a bit and going with a more aggressively pitched proper maybe shortening the props now and increasing there pitch..??