Re: [PSUBS-MAILIST] Vacum test

[Jon Wallace <jonw@psubs.org>]

Unless I'm missed something in the thread here, there seems to be no 
point in performing what you describe as a "hard" vacuum test.  The 
issue you raised regarding internal components may or may not be valid 
depending upon what's inside.  A storage container inside the cabin made 
out of sheet metal without any supporting ribs (for example) certainly 
could buckle under a hard vacuum test, so why risk it.

It appears that only a small vacuum is necessary to expose obvious 
leaks.  If you intend to take your sub deeper than 33 feet, a "hard" 
vacuum test doesn't seem to provide any benefit over a "light" vacuum test.

Jon



Brent Hartwig wrote:
> If one takes into account of all the internal components of a 
> particular sub, would you guys think it would be a worth while test to 
> pull a hard vacuum in the subs hull after light vacuum testing was 
> completed successfully for a new sub, and/or newly refitted sub?
> *
> Regards,*
> *Szybowski*




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