On Tue, 9 May 2006, Tony Smith wrote:

> Maybe when James figures out how to recharge his pushbike, we can use
> that instead.  I still reckon coiled springs.  Really big ones.
> Clockwork cordless drills...

There was a windup spring powered car in the 18th ? century, made by a 
clockmaker (how else). As usual, someone will feel he was born too late:

http://www.halfbakery.com/idea/Regenerative_20Brake_20Bike
http://www15.homepage.villanova.edu/rebecca.vernot/Senior%20Design.htm
http://www.cybersaa.org/newsletter/praise.html

http://www.aircaraccess.com/history.htm

Note Hardie design and Porter! The 'German' locomotive is interesting 
(note pun on Prius vs. patents). Terry Miller's contribution!

Peter

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