RE: Bench running a TT40
Any side loading Impact to a roller bearing will definitely cause dents in the bearing races, leading to bearing failure. I would think this is an Item that should be checked after a crash ? Loosing the bearings while in flight after the fact, results in scoring of the liner and piston and sometimes the lose of the complete engine. As far as 424 Q 500 Out here in the old Western Dakota Territory we just make up our own club rules TT40 stock and a 10X6 MAS Prop and go have fun.
jerrysu29 Call Sign Wild Man