ORIGINAL: Safebet
I don't mean to butt in on your thread, but I have a Evolution .61 that is running the factory 3-blade prop. I would like to change to a 2-bladed prop.
I thought about 11 x 7 or 11 x 8. The engine is on my Alpha 60 trainer. I not particularly looking for speed. I am learning so I would like power in
case I get in a tight spot. Would the 11 x 8 be better for power?
Thanks
I had a Thunder Tiger 61 Pro on my trainer.
The “benchmark” prop for my engine is 11x7 according to a LHS owner who says he got to tour the factory and talk to some of the engineers.
My trainer would float forever with this prop. My engine had a good slow idle but my instructor usually had to kill the engine on final to get good landings.
I put on a 12x6 and it made a lot of difference. The extra diameter gave more thrust for shorter takeoffs and stronger vertical climb; and the decreased pitch allowed the plane to slow down just enough to land with the engine running.
I tried the APC 13x4W “3D Fun Fly” series on my trainer. I really liked the performance but not the expense for a beginning pilot. They cost about $8 each. I had 3 ‘nose down’ landings one day and broke $24 worth of props; so I went back to the $3 12x6s