<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Sean,</div>
<div>Seems like your results on O2 are the same that I found. I have (2) 80 cubic foot O2 tanks on my 2 man submarine. I am pretty sure most psubbers are not sticking to the mission time plus 72 hour requirement. I believe my figuring of 23 lbs of intersorb 812 per person is also close to correct and most psubbers are not carrying that as well. It seemed like a lot to me at the beginning based on my observations of other psubs, but I think it is correct.</div>
<div>Thanks,</div>
<div>Scott Waters</div>
<div> </div>
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<DIV id=wmQuoteWrapper>-------- Original Message --------<BR>Subject: Re: [PSUBS-MAILIST] Life support<BR>From: "Sean T. Stevenson via Personal_Submersibles"<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR>Date: Tue, April 22, 2014 8:13 pm<BR>To: Personal Submersibles General Discussion<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR><BR>
<DIV class=moz-cite-prefix>According to the ABS rules, per (11/35.3), you need sufficient oxygen for the mission duration PLUS the 72 hour reserve.<BR><BR>Per (8/7.1), oxygen: 0.038 kg (0.084 lb) per hour, per person, at 1 atm.<BR><BR>x 72 hours emergency duration = 2.736 kg (6.032 lb) per person for 72 hours.<BR><BR>2.736 kg x (1000g/kg) x (mol O2/31.9988g O2) x (22.4 liters / mol O2) = 1915 liters (@ STP, ideal gas assumptions)<BR><BR>= 68 cubic feet oxygen per person for emergency reserve, additional oxygen appropriate to mission duration.<BR><BR>Sean<BR><BR><BR><BR>On 2014-04-22 17:52, swaters via Personal_Submersibles wrote:<BR></DIV>
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<DIV>I have been trying to make sure I have suffecent life support for 72 hours per ABS. It seems like the research varys a little. </DIV>
<DIV>I am showing</DIV>
<DIV>*80 cubic feet of O2 per person</DIV>
<DIV>*23 lbs sodasorb per person</DIV>
<DIV><BR></DIV>
<DIV>Is this right?</DIV>
<DIV>Thanks,</DIV>
<DIV>Scott Waters</DIV></BLOCKQUOTE>
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