Help! Brushless motor gearing

Quinnyperks

Legendary member
have been looking into a large balsa ultralight build, Probably a 35-40% piper pawnee. The motor I have is a turnigy aerodrive 6364, will do 2500 watts on a 20x12 on 10s. I'm looking to run a 30-32 inch prop with some sort of gearing in between. Anyone have any idea of where I can find the needed gear sizes and setups?

All help is appreciated, thanks, Quinn