Re: [PSUBS-MAILIST] Isn't 'Mini book review.' anymore--pressure test

[AndrePevestorf@aol.com]

In einer eMail vom 11.04.2002 20:51:07 (MEZ) - Mitteleurop. Sommerze schreibt rjune@fuse.net:


> why all the comotion about tank testing a sub.
>
> I think it would be more wise to desighn/buld a sub
> for 2 times the intended depth (say 200 meters).
> and ony use it at the intended depth (100 meters).
> isn't that what safty factors are all about.


OK, but how do you want to evaluate that it is designed for XXX meters crush deep to know that you can use it safe within XXX / 2 or 3 ???

Nevertheless you need a fixpoint for all the relations. 

Itīs quite extensive to calculate the external crush pressure of a hull with a exactness of lets say 10 percent. 
( all the formulars gives your more or less a good estimation for the basic design but a real sub "hurts" the theoretical assumptions manytimes..)
Itīs so much easier to DO it !! 

Furthermore a test chamber allows not only highly extensive crush test but also "simple" test of sealing or tank blows or something like this ...

A.