First I would like to start with the simple fact that i am new to scale and gas. The scale aspects i am learning as i build a cockpit here, pilot there etc. and with each build i am getting better and better, weathering and building, you can say, i learn as i go. I AM HAVING to much fun. Now for the down side, i do not know a thing about gas engines. What a maze you guys deal with zenoah here, DA there, a new world from my glows. The help i need is this, I had a great deal on a GP p6e skyhawk and i would like to go gas and desided on a zenoah G-38 a little on the overpower side for this aircraft but thats ok, but i can not seem to find how to figure what 3 blade size would be max for this engine. I would like to come close to scale but that will not be practical but close would be fine. I have seen great props by the solo prop company with great hubs, yet i can not determine size or pitch. Please be aware i do not need a hot rod performance, just standerd flight handling. I Have seen the post on the build and also on the G-38 install on the forum they where great, but no word on three blade with this engine. I once was told that one inch less for each additional blade (example: 22x10 2 blade would then go to a 21x10 3 blade any merit to this formula? Guys thanks ahead for the info and good flying.