In reply to  David Roberson's message of Sun, 14 Apr 2013 01:29:19 -0400 (EDT):
Hi,
[snip]
>Has anyone figured out a theory as to where the energy comes from to drive the 
>motor?  Are the magnets depleted with time?

I think you can get a measure of the maximum energy stored in the magnets by
multiplying the MGO of the magnet by its volume. Even for very strong magnets,
it's a pretty small number.

Regards,

Robin van Spaandonk

http://rvanspaa.freehostia.com/project.html

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