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To: techdiver@inset.com
Subject: Trimix + Re: Hose wars
From: scifi!njs@uu*.UU*.NE* (Nicholas J. Simicich)
Date: Tue, 16 Feb 93 08:21:24 EST
Um, frankly, so far, I've seen nothing in this mailing list that
couldn't have been posted to rec.scuba.  The audience level (from the
indroductions I've read, and my knowledge of the participants) is
about the same.  And so, in general, are the postings.

About PP mixing of He:  You should know that the ideal gas equations
don't apply to helium at 3000 PSI and room temperature.  They aren't
close enough to be safe.  Larry "Harris" Taylor, in a copyrighted
article (available on GEnie) points out some of the pitfalls.  I have
the Mixed Gas Diving book referenced, but I haven't had a chance to
read it yet, since I'm trying to learn Windows NT.

There are two remaining possibilities:

1.  Mix by weight.  There are scales that can measure the weight of a
    tank accurately enough.

2.  Mix and analyze, and develop tables that show what emperical
    results are.  Eventually, develop tables (and even equations) that
    describe the behavior of different trimix ratios at temps and so
    forth. 



Nick Simicich - uunet!bywater!scifi!njs - njs@wa*.ib*.co*
SSI #AOWI 3958, HSA 318, NAUI #14065, PSI #3286
Words of wisdom from Zippy: 
.  One FISHWICH coming up!!

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