O.S. 46 AX question
Hey guys. I have a Hanger 9 P51 pts with a O.S. 46 Ax engine in it and when i do high speed low passes my engine does something weird. When i get to peak rpm and speed it sounds like my propeller has come off for a split second. The engine winds really high and then goes back to normal. It does this one or two times on just about every full speed fly-by. The rest of the time it sounds normal. I broke my 11x6 prop the other day and all i had was a 10x6 so i put it on. I didnt know if that prop was to small or what. I am running fairly rich on the high side due to the fact that im still breaking in the engine. Any comments would be appreciated.