Im running a OS 1.20 fs turning a 15/8 master airscrew k series turning at 9.1. If I go to a APC 15/10 what kind of RPM loss am I looking at app.
Greg

If you change from a MAS 15x8 to a MAS 15x10 , both K series (if they exist) RPM should decrease about 1000 RPM. If you want more pitch at about 9000 RPM, a 14x10 should run at about 9200. I don't know what the MAS to APC change will do. I think it won't get the 1000 rpm back.

Hi!
First of all the MA prop is no good! Noisy and no performance compared to APC.
Second a 15x10 prop is way to big for the OS 1.20 . You would be better of either using a 15x8 or a 16x6 APC.

Regards!
Jan K
Sweden

I tried the APC 16/6 hardly any performance / speed wise it would fly the corsair but not too good 15/8 mas is better but I want a little more speed than that. This is a KMP corsair 71" WS at 14.5 pounds
Thanks for the replt
Greg