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The plate thru hulls that were installed on the tube section of the Alicia sub, had very wide and thick steel welding in rings. Part of that I would presume would be so they could have a place on both sides of the hull to weld in the rings to the tube, and the other to keep the rings from distorting. I don't know if it worked as planned or not, but perhaps it didn't since on the next steel hulled sub Paul build the S201 he used only plate thru hulls in the heads as far as I know. The ones used on the S201 were much lighter as well. The steel welded in rings on Alicia have a inset areas cut out of both the top and bottom faces. I used to think these might be for centering the outer SS plate and the inner retaining ring. But perhaps they were machined after the rings were welded in, because of distortion like Alec had trouble with. Regards, Szybowski Subject: RE: [PSUBS-MAILIST] Alec's Plate Thru Hull Assembly Date: Tue, 24 Feb 2009 10:57:31 -0500 From: Alec.Smyth@compuware.com To: personal_submersibles@psubs.org Go ahead Jon,
no problem.
With respect
to the o-ring, I just made my own using an o-ring kit from MSC. The kit is
nothing but an assortment of different diameter o-ring cords, a razor, and
superglue. The o-ring in Snoopy's penetrator bulkhead has been there for 4 years
now without incident. When I replace it I'll see if I can find an appropriately
sized off-the-shelf one, but I'm afraid I don't have a standard size for
it off the top of my head.
Brent, I did
spot one minor apparent error on the first of the renderings. It appears to show
a weld between cover and seat that doesn't belong.
A comment I
would add with this on the site... I'd recommend installing these only on
endcaps, not on cylinders. The intersection of the seat with a cylinder, even a
big one like the main hull cylinder, is such that the weld along that
intersection pulls the seat out of a plane and the plate won't
seat evenly. I've installed two of them on the main hull and had to re-machine
the seats in place, which is an extremely nasty job. I've installed another
two in endcaps, and neither of those distorted.
thanks,
Alec The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent
Hartwig
Sent: Monday, February 23, 2009 23:57 To: PSUBSorg Subject: RE: [PSUBS-MAILIST] Alec's Plate Thru Hull Assembly Thanks Jon, I wouldn't mind, but you might have to twist Alecs arm a bit. ;} I need to add some clearance between the plate and it's seat in the model and get with Alec to find out exactly what size of O-ring he used and the exact gland size. Then I could add all the measurement's to the drawings. You could start the page with the pictures you've already seen. Since there are several plate thru hull designs out there, it might be good to have them all grouped together some way. Regards, Szybowski > Date: Mon, 23 Feb 2009 22:53:59 -0500 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: Re: [PSUBS-MAILIST] Alec's Plate Thru Hull Assembly > > > Nice design by Alec and drawing by Brent. Any objection from either of > you with putting this up on the website? I think we should find a place > on the website for some of these designs rather than have them get lost > in the mailing list. > > Jon > > > > Brent Hartwig wrote: >> >> >> * Hello Subdudes, * >> * * >> * Alec was nice enough to send me a couple of his drawings of the >> plate thru hulls on his subs. I worked up a 3D assembly model based >> off his drawings and pictures. I think they are reasonable close to >> what Alec has. I thought Alec's welded in ring was steel when I made >> the CAD assembly, but both the plate and ring are 316 SS. * >> * * >> * So you guys can get a good idea of how they work, here are a couple >> pictures of the 3D assembly. * >> >> http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Alec%7C4s%20Plate%20Thru%20Hull%20Basic%20Configuration > > >> * >> Regards, * >> * Szybowski * > > >> >> > > > > > ************************************************************************ > ************************************************************************ > ************************************************************************ > The personal submersibles mailing list complies with the US Federal > CAN-SPAM Act of 2003. Your email address appears in our database > because either you, or someone you know, requested you receive messages > from our organization. > > If you want to be removed from this mailing list simply click on the > link below or send a blank email message to: > removeme-personal_submersibles@psubs.org > > Removal of your email address from this mailing list occurs by an > automated process and should be complete within five minutes of > our server receiving your request. > > PSUBS.ORG > PO Box 53 > Weare, NH 03281 > 603-529-1100 > ************************************************************************ > ************************************************************************ > ************************************************************************ > |