[PSUBS-MAILIST] Gamma hatch
Alan James via Personal_Submersibles
personal_submersibles at psubs.org
Tue Dec 2 22:36:30 EST 2014
Brian,I am not an expert but in case no one else says anything,I have heard you get a better seal with a softer o-ring at shallower depths.So the 70 might be better for you. The Deep Worker is going down to 2000ft.Alan
From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wednesday, December 3, 2014 4:05 PM
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Alan, The outfit that I go through were out of the 80 durometer ( 19" in dia), but they had the 70. Brian
--- personal_submersibles at psubs.org wrote:
From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Wed, 3 Dec 2014 01:19:46 +0000 (UTC)
Brian,the "Deep Worker" uses 80 duromer.Here is the Parker o-ring selector pdf link.www.parker.com/literature/ORD%205700%20Parker_O-Ring_Handbook.pdf
Alan
From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wednesday, December 3, 2014 10:47 AM
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Does anyone know if a durometer of 70 would suffice for a hatch o ring?
Brian
--- personal_submersibles at psubs.org wrote:
From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Mon, 1 Dec 2014 13:18:17 -0800
Brian,
I know that piece is pricy, yikes, that is why I use 516-70 then laminate 1/16 ss to that. I am to cheap to buy the ss ring. :-) Yes the ss tube is for my cue ball arm.
Hank
--------------------------------------------
On Mon, 12/1/14, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Subject: Re: [PSUBS-MAILIST] Gamma hatch
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Monday, December 1, 2014, 2:23 PM
The stainless seems to do all kinds
of crazy stuff when welded, Hopefully there's enough meat on
there to deal with any warp-age, clamping or tacking to a
flat piece of plate may also be an option. I'll have
to take it to a shop that has a big enough lathe to handle
it, I've already talked to them about it. That ring was
quite costly !
Brian
--- personal_submersibles at psubs.org
wrote:-
From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Mon, 1 Dec 2014 05:04:04 -0800
Brian,
I have to agree about feeling better with the ring in the
middle. At the same time, I feel better if the CT is
also in the middle and the hatch dome is in the
middle. This way all the force from the hatch is in a
strait line down to the hull. When I welded my
K350 ring (not ss) it warped just under 1/8in. I
have to assume the designer allowed for that and started
with a heavier ring than required. I never use a ss
ring, so can't say how it will react. I would assume
it will warp at least 1/8 inch maybe more. Your
starting with 1/2 inch material, what will you end up
with? Will it be enough? I would consider making
a steel ring, then bolt the ss ring to it. I am
assuming the ss ring is simply for corrosion
resistance. I would run that idea by an engineer of
coarse.
Maybe your welders have a technique to reduce warp age.
Do you have a lathe big enough to machine this?
Hank
--------------------------------------------
On Sun, 11/30/14, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
wrote:
Subject: Re: [PSUBS-MAILIST] Gamma hatch
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Sunday, November 30, 2014, 11:32 PM
Hank,
I'm sort of leaning back
towards putting everything in the middle again. For
some reason the wider the hatch ring the better it makes
me
feel, not sure why that is, maybe just more surface area
to
be in contact. Theoretically if your two mating pieces
are perfectly flat you wouldn't even need an o ring !
Also, my welder wants me to put it in the middle.
Brian
--- personal_submersibles at psubs.org
wrote:
From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Sun, 30 Nov 2014 17:51:28 -0800
Brian,
If the hatch dome ends in the center it would. Did you
notice how narrow the land is on Gamma, it is like 3/4
inch. The hatch ring is the same, I was surprised to
see that.
Hank--------------------------------------------
On Sun, 11/30/14, Brian Cox via Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject: Re: [PSUBS-MAILIST] Gamma hatch
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Sunday, November 30, 2014, 6:09 PM
Seems like if you had the welds in
the center the pressure would be distributed evenly
across
the 1 1/2" land and hatch ring.
Brian
--- personal_submersibles at psubs.org
wrote:
From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Sun, 30 Nov 2014 10:55:45 -0800
And that point is generally at the outer edge of the
land.
Hank--------------------------------------------
On Sun, 11/30/14, hank pronk via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject: Re: [PSUBS-MAILIST] Gamma hatch
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Sunday, November 30, 2014, 1:54 PM
You would think the weld
point should be directly below the weld point where
the
hatch dome meets the ring. This would transfer the
load
straight down.
Hank
--------------------------------------------
On Sun, 11/30/14, Brian Cox via
Personal_Submersibles <personal_submersibles at psubs.org>
wrote:
Subject: Re:
[PSUBS-MAILIST] Gamma hatch
To:
"Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Sunday, November 30, 2014, 1:51
PM
Good information Alec,
thanks !
I'll have it turned
afterward of course but no need to take
off
more metal than necessary.
Brian
---
personal_submersibles at psubs.org
wrote:
From: Private via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion
<personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Gamma hatch
Date: Sun, 30 Nov 2014 13:30:18 -0500
Careful! If you weld a ring
on the way you describe with the
weld in
the middle, the weld shrinkage on either side of the
head wall can bend the SS, leaving you with a
curved SS
ring. I can tell you from painful
experience the amount of
deflection can be
amazing, we're not talking a few
hundredths... In my case it was about a quarter
inch.
I'd
recommend cutting the head so it
meets the ring at the
outside corner.
Best,
Alec
> On Nov 30, 2014, at
11:36 AM, Brian Cox via
Personal_Submersibles <personal_submersibles at psubs.org>
wrote:
>
> Hank,
> I think I'm
going to have a shop
down the road turn
that elliptical head so that the edge
comes
right in the middle of the bottom of the ring, still
need to talk to the welder to see what kind of
edge he
wants. With the hatch I'm
thinking of welding a large
pipe segment on
there because there's nothing to grab onto
for the lathe.
>
> Brian
>
> --- personal_submersibles at psubs.org
wrote:
>
> From: hank pronk via Personal_Submersibles
<personal_submersibles at psubs.org>
> To: Personal Submersibles General
Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Gamma
hatch
> Date: Sun, 30 Nov 2014 07:57:38
-0800
>
> Brian,
> I will look forward to a picture of your
CT and
hatch. In particular I would like
to see how you
transition from the
elliptical portion to the 1 1/2in wide
ring.
> Hank
>
--------------------------------------------
> On Sun, 11/30/14, Brian Cox via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
>
> Subject: Re: [PSUBS-MAILIST] Gamma hatch
> To: "Personal Submersibles General
Discussion" <personal_submersibles at psubs.org>
> Received: Sunday, November 30, 2014,
10:44 AM
>
> Hi
Hank,
> I bought two
> stainless rings 1/2" thick by 1
1/2" wide (18" id).
Which
> will be welded on to the conning tower
and the hatch,
then a
>
o ring groove put in the hatch side. With the
drop I
> was able to get
6 - 6" disks which I'm going to
make
> into electrical inserts that will
go into two of my
> viewports.
> Conning tower getting welded today (
8
viewports) and
> also
working on the other viewports on the sphere, got
two
> welder friends that
I have working on them, both 30+
years
> of commercial welding experience !
>
> Brian
>
> --- personal_submersibles at psubs.org
> wrote:
>
> From: hank pronk via
Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General
Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Gamma
hatch
> Date: Sun, 30 Nov 2014 05:39:19
-0800
>
> Brian,
> What did you do for the hatch seat on the
conning
> tower. Is it stainless or
did you do like Gamma
has, a
> layer of stainless welded on.
> Hank
>
--------------------------------------------
> On Sat, 11/29/14, Brian Cox via
Personal_Submersibles
<personal_submersibles at psubs.org>
> wrote:
>
> Subject: [PSUBS-MAILIST] Gamma hatch
> To: "PSubs" <personal_submersibles at psubs.org>
> Received: Saturday, November 29, 2014,
8:30 PM
>
>
Hank,
> Do you know how big the shaft is that goes
through the top
> of
your hatch? Have you every had to
disassemble it
> ? My hatch is
pretty much identical to
Gamma's,
> I'm in the process of cutting in a
little
viewport in
>
and also that rotating hatch closure shaft /
thru hull
>
deal. Seems like at least a 3/4"
shaft
> would be in
> order. Brian
>
> -----Inline Attachment Follows-----
>
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