Great engine.

I have the OS46fx, OS50SX, and the Irvine 53. love them all, and probably will never part with any of them, but the 53 is my favorite so far. I haven't tached any recently, but the 53 is more than just a little stronger than the 46fx. clearly stronger than the 50 too. Mine is currently on an Avistar trainer, hovers easily and pulls out with plenty to spare. My 46fx has quit on me a few times, but the 50 and 53 have been flawless performers. no hassleing with the needle valve to get the right setting... just flawless.

anybody want to buy a tower 46? or a magmum 40?