On May 8, 1:36 am, Ron Garret wrote:

I'll grant you it's not a slam-dunk argument, but it sure seems
plausible that it takes a lot more energy to turn a dead engine than it
does to move a stopped prop through the air at ~100 knots.

rg

It would seem so, but a stopped prop still swallows energy. The
turbulence behind it translates into heating of the air. If you have a
sensitive thermometer in a beaker of water, and stir that water, its
temperature will rise.

Dan