Va and turbulent air penetration speed.

"Tony Cox" wrote in message link.net...
"Dan Thomas" wrote in message
om...

The only times I have heard of engine mounts failing on light
airplanes is when a prop throws part of a blade, or maybe the whole
blade on a constant-speed prop. The imbalance is more than enough to
rip the engine off the airplane. Blades will fail when propeller nicks
are left untreated and cracks develop. The prop is the most highly
stressed bit of metal on the whole airplane, and THAT'S what pilots
should be concerned about, not engine mounts.


Nah. Properly designed engine mounts would never let that happen.

Cessna 185 operated by JAARS Inc, South America, about ten years ago.
Threw a blade and the engine tore off the mount before the pilot could
shut it down. It turned sideways in the cowl, and the cowl was the
only thing keeping it from departing entirely. The O-520 mount is a
bed mount; if it had been the usual rear mounting the engine would
have fallen off.

Dan