From: "Brent Hartwig" <brenthartwig@hotmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Perry lockout
Date: Sat, 27 Jan 2007 00:27:09 -0800
I'm interested in the locking ring hatch (LRH) for a number of different
applications. I believe I've come up with a economical way of building my
own LRH's. When I get the CAD work done I'll post it. The first item I
wish to put a LRH on is a small one person 2 ATM hyperbaric chamber with
the hatch opening towards the outside. The second item would be a Kraka
sized sub with a diver access hatch that can open into the pressure hull,
instead of down and into the water like the one Kraka has currently. The
type used on Kraka is easier to manufacture and looks like it works very
nicely, but I was just looking at the differences. The bottom access hatch
in Carsten's diver lockout (DLO) has a different design then the Russian
type I've seen. The pic I've seen of it was when it was not totally
finished so I don't
know if he added a gear system to rotate the hatch about it's center point
by having the gears attached to the hatches head and hinge towards the
outer area of the head. It looked like the main hatch area was to be
turned by hand, but if that's the case I don't know how they would get a
tight seal. Also with that style I would guess that you would need to
grease up the O-ring so as the hatch head was rotated into the O-ring it
would slide.
The third project I'm designing is a Carstenesque sized sub with a DLO much
like what the Euronaut currently has. I don't know what his DLO can handle
in the way of internal pressure but it looks very strong. He's using a two
hatch system for the DLO between the 1 ATM main crew compartment area and
the DLO. I was thinking that if I used the LRH type I wouldn't need the
double door set up on my DLO.
Do you have any close up pictures or mechanical drawings of the hatches
used on the Perry submersibles? Do you know what amount of pressure can be
safely handled on either side of the Perry sub's double action hatch's?
Regards
Brent
From: vbra676539@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Perry lockout
Date: Fri, 26 Jan 2007 21:57:32 -0500
Brent,
I'm not sure why you'd need a double acting hatch between the DLO and a 1
atm. section of the boat. On a military sub, they use that kind of hatch to
separate sections of the sub in case of flooding. They will hold from
either side, yes, but why would you want that in a psub? Maybe you are
thinking Carstenesque in size, a BIG psub, and if so, we're talking apples
and oranges here, as I was thinking of a small one. If you have a sub big
enough for duplicate controls and flooded your crew compartment, but were
able to scramble into the DLO, then you could theoretically surface the
boat. The JSLs, for instance, have ballast controls in the DLO, and require
a trained tech back there on every dive, so that if the pilot becomes
disabled, he can blow the tanks. I'm shooting in the dark here, until I
figure out the whys on your design.
Vance
Vance
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