[Spridgets] Great cutaway engine

Glen Byrns grbyrns at ucdavis.edu
Tue Nov 24 10:04:09 MST 2009


> I thought Mini fans sucked through a radiator.
> I think they just have the fan on backward.
> My Midget, IIRC, turned CW.

Flipping a fan blade over does not change the airflow direction, it just
makes it less efficient due to the airfoil shape in the blade being "backwards"
An old trick for slow first flights on unthrottled model airplanes was to
turn the prop around. Hold one in your hand and flip it over, you'll see.

Glen Byrns


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