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Hi, Paul - to the best of my knowledge, I'm the
first one to design the concept into a submarine. I just made an
intuitive leap from lung to cockpit and realized that the regs don't care how
the delta-P is generated. All they care about is their diaphrams being
pushed in.
M. Child will probably have a simple oral/nasal
mask for breathing. At least initially. I probably will be using a
cabin dehumidifier, but not a CO2 scrubber. No constant flow of any
kind unless it comes from the blower in the hatch while transiting.
Rick L
----- Original Message -----
Sent: Friday, January 20, 2006 2:59
PM
Subject: Re: [PSUBS-MAILIST] Ambient /
1ATM Q?
Joe, right, they wouldn't do anything, would they.
I'm imagining the body of the second stage mounted outside the cabin
(at ambient pressure) and the mouthpiece plumbed into the cabin. Play
with the inhale sensitivity on the second stage and it may keep your cabin
pressure regulated. Add a bank of them for reliability and airflow and
then maybe add CO2 absorption or a constant flow air freshening
system...
I expect Rick or someone else could describe how
people have actually built these into an ambient sub. ??
Paul
On 1/20/06, Joseph
Perkel <joeperkel@hotmail.com>
wrote:
Paul, Rick
We are talking about second stage scuba regulators which are
triggered by the negative pressure of inhalation correct?
When this is in your mouth there is a large gradient between your
inhalation trigger and the surrounding pressure and this delivers the on
demand flow.
If the regulators are strictly inside the cabin with you, how do they
know what's happening outside? Unless there is some sort of
differential membrane trigger such as the one Chip described. As Rick had
described, I am assuming this bank of regulators is just sitting there in
the cabin with you, and absent a differential sensor, I don't see a
trigger for the flow.
Joe
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