But I just tached my old Fox .78 with a Master Airscrew 13 x 6 on it today. It ran 9500 rpm's, and pulled just over 7 lbs. of thrust on my brand new fish scale. Thrust HP says it should be 7.29 lbs under those conditions, so that seems pretty close.

I'm wanting to put a little Echo 16cc gasser on this plane with an APC 15 x 8. Think it will perform about the same as my Fox .78? Anyone?

Thanks,

AV8TOR