"Capt. Geoffrey Thorpe" The Sea Hawk at wow way d0t com wrote in message
...
snip

That was a problem on some of the early T-18's that were using cut down
propellers - resonance was fatiguing the propeller which would then shed a
blade, which would then encourage the engine to attempt to part company
with the airframe...


That used to happen so frequently with Formula air racers where they chopped
the props for the O-200's to get the RPM up to get additional HP out of that
little engine that they started using a safety cable around the engine.
That way when the prop shed a blade and the engine jumped out of the engine
mount the cable held it somewhere near where it was supposed to be so you
could get the airplane on the ground in a survivable fashion!

Not something you want to play with normally.

Highflyer
Highflight Aviation Services
Pinckneyville Airport ( PJY )