I have forgot to say that I picked this warbird up used and it does have a GMS .32 engine already installed! May fault. This is the reason I felt like trying out a smaller engine first. I meant to say replace the .32GMS nock offwith an OS.15 OR .25.

My LHS said try a 10x4 prop or a 3 blade prop with a lower pitch.

The guy I purchased the plane from insisted that a higher pitch prop will always fly a little slower than a lower pitched prop??He said that I should start with a 9x6 with theGMS .32 and not with a 9x5? I always thought that a lower pitch prop is like a lower gear and will give you lower top end speed but higer speed on starts? He insisted that a9x5 prop is faster that a 9X6 prop.
A 9X6it will produce more friction ordrag through the air, thus slower speeds but will have more thrust/torque on take offs?


pLaNE NuTs,
Drypipe