Re: [PSUBS-MAILIST]

["Sean T. Stevenson" <cast55@telus.net>]

George, at 300 fsw the ambient pressure is about 150 psi.  I'd check 
your calcs over again.

-Sean


George Slaterpryce wrote:

> Archimedes is being designed for a crush depth of 300' and an 
> operational depth of 150' at crush depth I won't be able to even fill 
> the ballast because the compressed gas will be at a lower PSI than the 
> ambient preasure. (4410psi Ambient vs 3000psi in the pony... full) at 
> operating depth I'll have close to 600 psi to spare so I can blow and 
> adjust the ballast at depth.
>
> I kept on running into the design problem of how to (cost effectively) 
> use compressed gas in a ballast system and what I came up with is 
> using a scuba tank... which automaticly limits me to 3000psi and thus 
> a "floor" of 204 feet before I could no longer blow the tanks. I 
> really wanted to design something that would crush at 300m and operate 
> at 150m but... I'm gonna have to settle for what I have if I want a 
> soft ballast.
>
> George Slaterpryce






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