[PSUBS-MAILIST] when depression is a good thing

[Marc de Piolenc via Personal_Submersibles]

Congratulations. One less thing to worry about when you are submerged!

On 02/08/2019 7:35 PM, Antoine Delafargue via Personal_Submersibles wrote:
> Hello all,
> just sharing with you that I put my sub under a bit of vacuum for an 
> unplanned test (I had left the sub under the sun, the cabin air got 
> hotter and pushed through the hatch which was just closed but not shut, 
> then everything went into depression inside when I pulled the sub back 
> into the garage).
> 
> one month later it was still holding vacuum...
> 
> I would not believe it given all the holes in the hull, some being 
> connections with tapered threads covered with teflon tape, plus I had 
> not especially cleaned the hatch surface nor greased the main oring.
> 
> Days like this I am grateful for the cumulative decades long experience 
> of engineers and people like you that go into this kind of result!
> 
> have a good week end
> 
> antoine
> 
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