My 601 has now flown twice with the corvair. The first time it flew, it did not climb very well at all. I have the warp drive prop that I bought through WW. It was set at 8.5 degrees, as recommended. Static RPM was at 2900. Once in the air you had to basically maintain full power to keep it from loosing altitude. The manual said that a flatter pitch would get you in the air but it would not be a comfortable trip around the patch. That is what it was like. I changed the pitch on the prop to 9.5 degrees to see what that would do. I have static RPM of 2750. it climbed at about 700FPM at 2800 RPM. It seamed a bit better in the air, but still had to keep near full RPM, to maintain level flight. Does anyone have any thoughts.