[PSUBS-MAILIST] when depression is a good thing

[Steve McQueen via Personal_Submersibles]

Thanks for sharing. I have yet to perform a leak test and I have some apprehension about this test since I have touched/rebuilt/added many penetrations. I am not looking forward to chasing down small leaks. Hoping to have your good luck!

Steve

On August 2, 2019, at 7:35 AM, Antoine Delafargue via Personal_Submersibles <personal_submersibles at psubs.org> 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20190803/2e4f886a/attachment.html>