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<div dir="ltr" data-setdir="false">Sean, okay that is where I missed the boat. I know about the do not exceed 1 atm rule but did not realize it meant a single tank. If I lost all my O2 it would be a problem. I am using multiple tanks so all is good. I do not have room to drill out the steel plus changing an O2 tank would really suck with this new body. Forget about a change if the sub is in the water.</div><div dir="ltr" data-setdir="false">Hank</div><div><br></div>
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On Thursday, January 30, 2020, 5:12:49 AM MST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv5334354676"><div>Nothing wrong with internal tanks as long as you can prove by calculation that the unintended release of the contents of any single cylinder (provided they are individually valved - hard plumbed manifolded cylinders where a single failure would empty them all would need to be considered together as one) will not raise the pressure of the occupied space by more than 1 atm.<br clear="none"><br clear="none">Through hull shouldn't be a big deal either. Drill larger if necessary, and use a stainless insert.<br clear="none"><br clear="none">Sean<br clear="none">-------- Original Message --------<br clear="none">On Jan. 30, 2020, 04:58, hank pronk via Personal_Submersibles < personal_submersibles@psubs.org> wrote:<blockquote class="yiv5334354676protonmail_quote"><br clear="none"></blockquote></div><div class="yiv5334354676yqt3789423500" id="yiv5334354676yqt53439"><div><div class="yiv5334354676yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr">Hi All, here is an interior picture of Limiting Factor that shows what appears to be O2 tanks. I thought it was not an approved practice to have that much compressed gas onboard. My original design in E3000 was to have external O2 supply but I prefer internal. I messed up in two ways. First off I provided a steel penetrator opening for O2. The other screw up is when I built the new body I completely neglected access to change out the tank. So I am going with internal tanks unless someone can talk me out of it. </div><div dir="ltr">Hank</div><div dir="ltr"><span><img class="yiv5334354676ydp5ce2c74mimg yiv5334354676ydp5ce2c74vimgld" alt="Image result for deep sea limiting factor images" src="https://www.bing.com/th/id/OIP.rXRjeEUIta40Nn71_8WHWgHaEK?w=294&h=164&c=7&o=5&pid=1.7" style="font-family:-webkit-standard;background-color:rgb(38, 79, 165);color:rgb(38, 79, 165);width:294px;max-width:294px;"></span><br clear="none"></div></div></div></div></div><div class="yqt3789423500" id="yqt34989">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
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