Okay guys! Let's forget I ever mentioned the word "Propeller" and assume that
B. F. Ponder was an early scammer..
http://blog.modernmechanix.com/mags/...4/prop_car.jpg
And this car never really got over 25 MPH..
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What about using a Ducted Fan ? (As shown above, but bigger).
If you could make one that delivered 300 pounds of thrust, using 200 pounds
of hardware and batteries..?.
The idea here is to somehow get power off the grid to help propel your car,
without performing major surgery on it..
