Re: [PSUBS-MAILIST] Re: Your sealed wetsub idea...

[Michael Edwards <me@sustainkauai.org>]

Greetings William:

Thank you for pointing out where I stuck my foot in my mouth ;-)
I guess in this case my body would be the hydraulic accumulator.

Best regards

Michael

William Alford wrote:

> At 10:29 AM 12/11/2003 -1000, Michael Edwards wrote:
> >
> > What happens to a 1 atm "wet" sub when you open the valve at 10 atm? We have
> > all been told water doesn't compress. An yet you have
> > a container of un-pressurized water, surrounded by "pressurized" water. Will
> > the pressurized water say outside even with the valve open?
>
> I have not been following this thread very closely, so may be missing some
> point, but do not confuse "compression" with "pressure". This is the focal
> principle of hydraulics-- force is transmitted best by uncompressible confined
> fluids. See -- http://www.adtdl.army.mil/cgi-bin/atdl.dll/fm/5-499/toc.htm
> (online Army Hydraulics Manual) and in particular,
> http://www.adtdl.army.mil/cgi-bin/atdl.dll/fm/5-499/chap1.htm#996942. Assuming
> that one is discussing an occupied submarine, it will not be entirely filled
> with incompressible fluid since various parts/bladders of the human body are
> quite compressible. Stability of a fluid-filled occupied submarine will be
> achived at great depth when internal and external "pressure" are equalized,
> only when hull movement stabilizes, and perhaps to the detriment of the
> occupant.
>
> William Alford