ORIGINAL: timevac

MARKTUR
I am fying the same setup you have but with an ultrathrust muffler .You will find that the best prop for the
os 55 on this plane is the 11x7apc .I have tried all of them . The hot pipe will bring you about another 1500 rpm, better vertical performance, and almost double your fuel consumption .I am out of fuel in 5 minutes.