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"Science and science fiction, how do you even distinguish the two?"
- Jerry Pournelle

Flywheel Cycle  
  A motorcycle powered by a flywheel.  

A very Eco-friendly solution.

We froze, rigid, as a pair of flywheel cycles moaned and skidded to a stop by our car. Only the police used these since they move a good deal faster than the peat-powered steamers. They are tricycle affairs with a great heavy flywheel encased between the rear wheels. They plugged them in at night so their motor-generators could run the flywheel up to top speed. During the day the flywheel generated electricity to drive the motors in each wheel. Very efficient and smog-free. Very dangerous.
From The Stainless Steel Rat's Revenge, by Harry Harrison.
Published by Pyramid in 1970
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