On Aug 3, 9:03 am, "Blueskies" wrote:

And...you could reverse drive it to pull air through the engine for cooling on the ground?
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Hahahahahaah,,, :-)

Don't be so silly :-) You're about two orders of magnitude out.

Minimum cool-down is going to take a pressure differential of about
3"H2O. With either suck-through or blow-through, for something like
an O-200 that's going to take about 3hp... about 2100 watts. You'd
need a couple of hundred pounds of batteries and a blower to match.

-R.S.Hoover