OK, why do they cover the prop?

"Dale" wrote in message
...
It kept the prop from dissipating the heat applied to the engine by my
pre-heater.

Interesting. I didn't realize so much heat could be transferred through the
crankshaft. I guess it makes sense though...the prop does have a lot of
surface area, so heat flow is easy to have.

On the bright side, with the engine pre-heater pumping heat through the
prop, you didn't have to worry about frost.

Pete