Re: [PSUBS-MAILIST] Viewport Question.

[" Dan. H." <jumachine@comcast.net>]

Jay,

The rescuers suggestion of an air inlet was more to offer some additional 
time to be submerged, in case of entanglement or what ever.  The team 
already has a setup to inject air in a tire valve type fitting.  I may be 
wrong in my thinking ,but wouldn't newly injected air dilute the stale air 
in a stranded sub?  Even better, if the person in the sub was conscious, 
they could breath directly from the inlet and exhale in the sub.

I know it would increase the internal pressure unless the stale air was 
pumped out, but increasing the internal pressure may be the least of your 
worries if your trapped inside for a while.

The way my sub is set up now, I could receive air through my snorkel inlet, 
but I would have to be conscious to open the valve inside the sub.  The 
rescuers could unscrew the external float valve and screw on an adaptor with 
a tire valve in it. Then once I open the internal snorkel valve, the air 
would come through.

Am I correct?
Dan H.


----- Original Message ----- 
From: "Jay K. Jeffries" <bottomgun@mindspring.com>
To: <personal_submersibles@psubs.org>
Sent: Sunday, January 06, 2008 12:05 PM
Subject: RE: [PSUBS-MAILIST] Viewport Question.


> Dan,
> Remember that you will need to fittings...an inlet and an outlet if you 
> are
> to maintain atmospheric pressure inside the stranded submersible.  Plus 
> you
> will need a rescue force familiar with your setup and the necessary
> equipment to affect rescue support.
> R/Jay
>
>
> Respectfully,
> Jay K. Jeffries
> Andros Is., Bahamas
>
> A skimmer afloat is but a submarine, so poorly built it will not plunge.
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Dan. H.
> Sent: Sunday, January 06, 2008 11:36 AM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Viewport Question.
>
> Some members of our local dive rescue team looked over my sub after it was
> completed.  One recommendation they had was to add a fitting and valve on
> the outside of the hull to allow them to inject air into the hull if I was
> inside and unconscious.  I never added it because I didn't like the idea 
> of
> an open line into the hull without being in some closed system or with a
> closed valve on it.  It may be a nice addition.  At least, someone could
> dilute a contaminated atmosphere in the sub or increase the hull pressure 
> if
>
> needed.
>
> Just a thought,
> Dan H.
>
>
>
>
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