[PSUBS-MAILIST] Gamma hatch
Daniel Lance via Personal_Submersibles
personal_submersibles at psubs.org
Mon Dec 1 12:14:09 EST 2014
Alec hit the nail right on the head . Either clamp or tack weld the ring to
a rigid steel table . It will definately warp if not restrained in some
manner. Rework is not cost effective .
Dan Lance
On Dec 1, 2014 8:21 AM, "Alec Smyth via Personal_Submersibles" <
personal_submersibles at psubs.org> wrote:
> I'd suggest clamping the ring to something very rigid before welding, and
> putting down no more bead than strictly necessary. Perhaps Dan Lance can
> chime in?
>
> Thanks,
>
> Alec
>
> On Mon, Dec 1, 2014 at 8:04 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> 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-----
>>
>> >
>> >
>> _______________________________________________
>> > Personal_Submersibles mailing list
>> > Personal_Submersibles at psubs.org
>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> >
>>
>> >
>> >
>> _______________________________________________
>> > Personal_Submersibles mailing list
>> > Personal_Submersibles at psubs.org
>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> >
>> >
>>
>> >
>> >
>> _______________________________________________
>> > Personal_Submersibles mailing list
>> > Personal_Submersibles at psubs.org
>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> >
>> >
>>
>> > _______________________________________________
>> > Personal_Submersibles mailing list
>> > Personal_Submersibles at psubs.org
>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> >
>> >
>>
>> >
>> >
>> _______________________________________________
>> > Personal_Submersibles mailing list
>> > Personal_Submersibles at psubs.org
>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20141201/83fdef52/attachment-0001.html>
More information about the Personal_Submersibles
mailing list