25cc pitts muffler - 16x8 prop 8000rpm
30cc gutted muffler - 16x8 prop 7300rpm
30cc pitts muffler - 16x8 prop 7430rpm
30cc ZERO muffler - 16x8 prop 7610rpm
Raven,
There does seem to be something wrong with the numbers between the 25 and 30. The numbers just for the 30 seem to be OK. I have seen a similar circumstance where the prop number seemed out of whack but it turned out that a different prop was being run. I get a 500-RPM difference on two props that are both 16x8 (MA classic vs. MA âKâ series).
Data for same 25cc engine:
8000 RPM MA âKâ series
7500 RPM MA classic
Bill