On Sun, 20 Jul 2003 05:16:09 GMT, ff wrote:

Anyone know offhand without going to too much trouble, what is the ratio
for volume of helium to lbs force against gravity ?

A Google.com search on:

helium lift cubic foot

....found more than one thousand, three hundred
web pages with the information you want.
No trouble at all.

--
--Pete
"Peter W. Meek"
http://www.msen.com/~pwmeek/