Re: [PSUBS-MAILIST] question about general design?

[Ed Greany <crest25@attglobal.net>]

Would you believe it was 4500# pressure for ballast tank blows when I
was on a sub? Now that's a lot of air!

Ed


Captain Nemo wrote:
> 
> BLOCKQUOTE { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } DL {
> PADDING-BOTTOM: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px;
> PADDING-TOP: 0px } OL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } LI {
> PADDING-BOTTOM: 0px; PADDING-TOP: 0px }
> 
>      From: David Buchner
>      To: personal_submersibles@psubs.org
>      Sent: Wednesday, August 08, 2001 9:46 PM
>      Subject: Re: [PSUBS-MAILIST] question about general design?
> 
> 
>      "Please do; I'm interested in understanding these reasons.
>      The main one I can think of is that at that pressure, those
>      things just don't hold all that much air. I used up almost
>      all of mine yesterday, pre-charging a 20 gal. household
>      water pressure tank to 28 psi. That wouldn't translate into
>      much ballast-blowing, at all. Besides, those always make me
>      uneasy by the time they get up to 120."
> 
>      You've got the idea, Dave.  It's a question of regulation
>      requirements and practical working pressures.  Besides, if
>      I'm going to take up space for an air bottle in my sub, why
>      would I want one that carries 1/25th as much?  Air is one of
>      those things it's better to have and not need, than
>      vice-versa.
> 
>      Pat