RE: o,s, 32 max
Speed racer I flew the plane 3 times with a 10 x 6 prop on it. It seemed to perform ok but was much better coming from a dive. Seemed like the motor wound up more. Found an online manuel and it said for sport flying use the 10x6. I would be more than happy to give the 9x6 a run if you think it is better for the engine. Looking to make the plane as fast as possible given what it is. Retracts and such would be nice but didn't want to sink a bunch into this little kobra. this is my return from 27 years out of RC and between this kobra and a trex 550 helicopter im having a ball. Flew pattern very little when I was a kid and the remakes of them from great planes have me salivating. that tuned pipe and screaming engine always did it for me. Thanks for the help, i'll give the 9x6 a try.