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Re: [PSUBS-MAILIST] A safety improved, battery pod/motor, using air as a water pressure equalization system



Gary,
 
Here are some of the variables: diameter vs length, wall thickness, type of steel.
You can be sure its working pressure is at least 250 psi,with a fat safety margin. That would give you 125 feet if it was as easy to blow up a tank as to crush it. It's not. So there's a factor there.
My 1,000 gallon tank (4' diameter,10' long) has 1/2" cylinder and 5/8" caps. It's been tested (unmanned) to 300 feet.
 
Peter Korwin
 
On Mon, 31 Jan 2005 17:40:25 -0800 (PST) Gary Brainard <brainardgary@yahoo.com> writes:
Ray Im looking to bu[ld  a psub for shallow diving. Do you or anyone know how deep a 500 gl. propane tank could take if it didnt have stiffners placed in it. Thank you for your help.

Ray Keefer <psubs2001@yahoo.com> wrote:
Hi Bill

--- Akins wrote:



>
> Do you have the link or know where I can read or see
> more info on it?

You can find Dan's Power Point Presentation at:

Site:
http://www.psubs.org/convention/2004/

Link on left side:

Speakers and Power Point Presentations

Then link:

Underwater Electric Cable Construction (22.4MB
Power Point presentation)

Regards,
Ray



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