[PSUBS-MAILIST] O2

[hank pronk via Personal_Submersibles]

 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.Hank
    On Thursday, January 30, 2020, 5:12:49 AM MST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 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.

Through hull shouldn't be a big deal either. Drill larger if necessary, and use a stainless insert.

Sean
-------- Original Message --------
On Jan. 30, 2020, 04:58, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:


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.  Hank
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