RE: [PSUBS-MAILIST] Alec's Plate Thru Hull Assembly

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

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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 *
> >
> >
> >
>
>
>
>
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