07-04-2026, 12:14 PM
(Edited 07-04-2026, 12:17 PM by Orv Neisingh.)
(07-03-2026, 02:50 PM)Tim Morris Wrote: You have all the fun!
I suppose that is because I fly many more hours in these helicopters than most folks so I get exposed to more issues. We know the cause of these crank breaks but unfortunately the only way to certify the integrity of the crankshafts is to pull the engine apart and check the bore alignment of the main crank bearing journals. This is why Joe Huff line bores every case before installing his new 172 engine crankshaft.
If you are flying with the stock Rotorway engine that has not been checked for the alignment of the crankshaft bearing journals, just use caution by always having an acceptable place to set down withing auto range as you fly. The crank break is not real common but in some of the engines that are flying it will happen, you just do not know when.