I think Paul actually meant "use a fan as a regen mechanism" not as a perpetual 
motion device.
Given the non-regen limitation of series DC motors, its not totally wacky. However Paul, if I have represented your idea correctly, it makes me think of an airboat or airbrakes, and that doesn't fit well with motorcycles. It would take an impossibly big fan. Just getting better batteries and clean electricity and/or H2 and fuel cells would be much better.

HTH
JF

damon henry wrote:
Nope,

No one has ever tested it.  How about if you be the first :-)

Seriously, this is basic physics.

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