Kenneth L Wiltrout wrote: > I would think the corvair would shine in the climb. My prop on the > Revmaster is a 54X50 and it spins at 3200 at cruise which gives me 135 > mph. Could I really expect a higher cruise w/the corvair, 3200rpm's is > 3200 rpm's. Would the extra power allow a higher pitched prop?
Yes, increasing prop pitch absorbs more power. My 3100cc Corvair has turned a 58x74 at 2650 rpm statically, in a range where I'd "only" expect to get about 95 horsepower from this engine. That's about 100 rpm faster than an 0-200 would spin it. I would need to lower the pitch so I can get the rpm up to level where I can take advantage of the 3600 rpm that the engine needs to generate the 130 hp and 192 foot pounds of torque (see http://home.hiwaay.net/~langford/corvair/3100_ml.gif ). It's all a balancing act. I plan to use a 52 inch prop eventually. This one's just a loaner to keep my engine cool while breaking it in, but I'll bet I could fly behind it if I had to... Mark Langford, Huntsville, AL N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
