Re: Fw: Re: [PSUBS-MAILIST] Scuttle valve

["Dan H." <jmachine@adelphia.net>]

Kittredge subs have a scuttle valve.

My K-350 have a two inch valve in the Aft. hull end cap to flood it for an
escape.  First bleed out air from the air tanks to raise the hull pressure
and then open the scuttle valve until you can get the hatch to open.  Then
your "up, up and away."  Hopefully still alive when you reach the surface.

The main reason for a large enough valve is so you can flood the hull quick
to reduce the time you'll be at high pressure.  Once you start raising the
pressure in the hull your under the same restrictions for SCUBA diving.  If
your taking to long to get out you'll have to make decompression stops on
your way up.  Not possible when you escaped with just two lungs full of air.

Dan H.

----- Original Message -----
From: "irox" <irox@ix.netcom.com>
To: <personal_submersibles@psubs.org>
Sent: Monday, March 08, 2004 5:50 PM
Subject: Re: Fw: Re: [PSUBS-MAILIST] Scuttle valve


>
> Hi Steve,
>
> I think there is a good reason to have a scuttle valve (or
> a flood/bailout valve) in a psub.  If you're stuck on the bottom and
> you want to go home, and you've got no other options, then
> it's time to flood the boat (this will help equalize the pressure
> inside the sub, with the outside water pressure, so you can
> open the hatch), open the door and scream your way to
> the surface (so the air expanding in your lungs will have an
> exit to use).
>
> This is something I would like to practice some day, maybe
> in a swim pool, may be a little deeper.  But I'm not sure I would
> what to do it with a full complete sub, maybe an almost finished
> by not furnished inside or something).  I remember Ray talking
> about building a sub which was water proof inside and could
> be flooded on the bottom... something like that would be a
> good test rig for practicing exits.
>
> Also, it's good to calculate the size of your scuttle valve so you
> can flood the sub quickly (so you aren't sitting in cool water
> for 5 hours while the sub slowly fills up).
>
> Ian.
>
>
> -----Original Message-----
> From: Steven Mills <cirtemoeg@juno.com>
> Sent: Mar 8, 2004 2:04 PM
> To: personal_submersibles@psubs.org
> Subject: Fw: Re: [PSUBS-MAILIST] Scuttle valve
>
> Me again,
>
> I have to correct myself here.  I think most all ships and boats,
> regardless
> of era, had scuttle valves, even civilian. I would wonder if there be
> "any" reason
> to have one on a personal submersible? I know, seems like a ridiculous
> question to ask, but would there be?
>
> --Steve
>
>
>
> On Mon, 8 Mar 2004 13:40:57 -0800 Steven Mills <cirtemoeg@juno.com>
> writes:
> > I believe, historically, most military ships and submarines of the
> > WWII
> > era had scuttle valves.  I recall that film U571 [ I believe that's
> > it ]
> > had the
> > Enigma machine onboard and the Allies were after it.  Fearing
> > capture
> > of both sub and Enigma codes the crew made an attempt to scuttle or
> > sink it before it could fall into Ally hands.  They did not succeed.
> >
> > Have you seen the film?  Are you interested in WWI and WWII era
> > submarines
> > and submarine development?
> >
> > regards, --Steve
> >
> >
>
>
>
>
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