I don't think it would be the static HP that would be the problem. I
get less than 5 KSI shear stress for a solid or near solid shaft
transmitting 400 HP at 2700 RPM. A complex section like a crankshaft
of 4340 heat treated, blessed by the Pope etc, and nitrided should be
good for maybe +/- 40 to 50 KSI.

Obviously the fatigue problem is completely dominated by the dynamics,
which in turn are dominated by the damper integrity(s). Mechanics have
to realize how important these gadgets are. I'd hate to have to
explain to a jury how they work though.

Another minor stress factor could be gyroscopic loads in an aerobatic
A/C.


Dunno.... guess we'll wait and see...

Yep!

NRP