revopower; engine in a front bike wheel.

[kenwshmt2]

http://peswiki.com/index.php/Directory:RevoPower_Wheel




200 mpg;
12 lbs of added weight;
20 mph top speed;
65 DB noise at 4 meters.
no idling, it runs only when the bike is moving.

And from $400 - $600. they say its a simple replacement of the front wheel of a mountain bike with this thing.