Originally Posted by
elmshoot
What prop are u using to turn 7,000 RPM?
My engine is a retro fit into the plane and I had to take what I was given.
Sparky
As explained before this engine is mounted in a H9 Beaver. For reasons of ground clearance and too high idle, I used a 20 x 8 airscrew master. The propeller is therefore undersized for this engine. But more interesting is that before the change with the MMM ring, in identical test conditions, this engine has never turned more than 6500rpm on the ground.
With a so low iddle I will now mount a 20 x 12. My goal is to fly at 3500-4500rpm
JM