I wrote:
> P is absolute pressure, i.e. atmosphere is about 32 psi absolute.

Duh.  Jim is right, of course, 14.7 psia = 0 psig.

I remembered the wrong constant.  32 "feet of water" is about 1
atmosphere.  Jim's answer is right, I think.

regards,

Barry.
------------
Barry King
NRG Systems "Measuring the Wind's Energy"
http://www.nrgsystems.com
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