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Date: Thu, 05 Feb 1998 11:47:32 -0500
From: eschmidt@pu*.br*.fl*.us* (Erik Schmidt)
To: claus agersbaek <agersbak@za*.ee*.dc*.ie*>
CC: techdiver@aquanaut.com
Subject: Re: Formula

You forgot a step...

1200 psi / 3000 psi =  0.4
0.4 * 80 = 32 CF remaining
32 CF / (.7 CFM * 8.42) = 5.43 minutes to Out Of Air!


claus agersbaek wrote:

> At 12:44 05/02/98 GMT, bcolman@gt*.ne* wrote:
> >
> >        Can anyone help me out...
> >
> > At 245 FSW, there is 1200 PSI in a 80Cu.Ft Cylinder, if the divers
> >gas consumption is .7ft/min, how long will it last..??   I cant seem
> >to find the right formula..??
> >
> the preasure @245fsw is (245/33 + 1)= 8.42 ATM
> you are using 8.42 times as must @ 245FSW
> 80Cu.Ft / (.7Cu.ft/min *8.42) = 13.5 min
>
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