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More interesting wheel stuff.
There is a fascinating paper by Morelli, citing Cogotti's research (SAE 2001-01-0491), which I'll try to summarize. It's copyrighted. You need to see the pix.
Adding a centrifugal fan to the rear wheels so as to draw air from the outside through the wheel yields a 5kW savings for the 240 W expended (20.8:1 advantage) by the following:
a: narrower wake due to air suction
b: a major decrease in base drag
c. suppression of jetting vortices by means of the Coanda effect.
I'd love to see someone try this.
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