Prop sizes
 

I have a 31% Aeroworks Edge with a 3W 75cc engine currently running a 24x10 two blade Menz 'S' wooden prop.
The plane flies very well on this prop but is too noisey for the U.K. regulations, although I have a 3W tuned canister exhaust.
I have tried a 26x10 prop but this kills the engine above 1/2 throttle.
Does anyone know what size 3 blade prop to use, I have been told to go 1 inch smaller in diameter and same pitch but other people have told me different. Also will a 3 blade prop make it quieter?.

Cheers.....Stuart

RE: Prop sizes
 

I used a 24x12 mejzlik 3 blade on my 75, turned it at 6100 and was quiet, was also on an aw 31% edge and worked well. A fuchs 23x12 should work really well too.

RE: Prop sizes
 

A Mejzlik 26x10 two blade standard or narrow should also work well and be quiet. You may have to adjust the high speed needle for the larger prop with the heavier load - go richer.