Re: [PSUBS-MAILIST] Hard / soft ballast tanks.

[atozed@juno.com]

Yes, its pressure will vary. I'm going to use an old carbon dioxide fire extingusher.

Peter K

 

On Mon, 31 Oct 2005 14:07:50 -0700 Paul Kreemer <paulkreemer@gmail.com> writes:

Adding a valve to a soft ballast tank does change the tank from an ambient to a potentially 1atm chamber.  By closing that valve you allow a pressure differential to be created when your sub changes depth.  So you'd have to build it much stronger than a more simple soft ballast tank.  Right?

Paul

On 10/29/05, Myles Hall <myles.h@sasktel.net> wrote:

Bill,

 

   To make a "soft" tank into a "hard" tank, do I simply need to install a valve to let in the water as opposed to just an open flood hole ?  This valve, of course, would keep the water from coming in while the sub gains depth (pressure).

 

Myles.