I almost completed my Sig 4 star 60 ARF. I got a Super tiger 75 for the Airplane. According to instruction of the engine, you should be using 12x8 to break in the engine. That said, can anyone explain what the difference between using difference prop sizes to power an airplane. All things being equal what if I go with a 12x5 or 10x8 or a 15x8 - how does this affect thrust or speed. My NextStar is is using an OS .46 and 11x6 prop...so would not a 12x6 or 12x8 be to small for Super Tiger 75. If anyone can shed some light on this would be great..or point any readings on prop theory or selection.

If you have a Sig 4 start 60, let me know what engine and prop you are using.


Thank you.
Qwazzy!!