Here's one I did a few years ago:
http://www.charlesriverrc.org/articles/construction/joelfoner_materialweight
s.htm
(sorry for the long URL - that should all be one line)
Regards,
Joel
Joel Foner
Webmaster - Charles River Radio Controllers
http://www.charlesriverrc.org/
IRCHA #1458
mailto:[EMAIL PROTECTED]
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