Scott Cable wrote: > Sounds to me like the engine is sick...Mid 70's compression is too low. Either you have some rings that are not seated, valves too tight or you may have some burned or unseated valves or valve seats.
I feel pretty sure that what he's talking about IS a leakdown test, in which case, mid 70's would be considered pretty good. I think that was his point, that the compression was good. After making sure the engine was running correctly, I'd suspect too much prop. Borrow one with less pitch from somebody and see how yours does with it. There's a list with a few props on it at http://home.hiwaay.net/~langford/props.html , and one 1835cc guy is using a 52x42. It would be good of I could get some more input from flying KR's to add to the list... Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
