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Re: [PSUBS-MAILIST] OSS Pressure Hull
Awesome! Welcome aboard! I was hoping someone was willing to take a swing
at the pressure hull! I have been playing with a few things that might
help maximize space usage. I'll post them so you can see if you want to
work with them or not. We'll find someone who is qualified to do an
"audit".
Warren.
>
> Warren, I'm interested in designing the basic pressure-hull, but
> because I'm never built a pressure-hull before and I don't have
> a copy of the PVOH AMSE standard, I don't want to design the actual
> metal, I'd prefer that's done by somebody with experience.
>
> I will:
>
> * base the design around the human posture shown here:
> http://www.psubs.org/pic/humaneng.html
>
> * Solicit the information require to complete the design
> from the the mailing list.
>
> * design the geometery, layout and calculate the dimentions.
>
> * try to keep it simple and realistic.
>
> * make a guestimate of the metal thickness and ribs.
>
> This should be enough to design all the other parts. So the
> final pressure-hull metal can be calculate/designed last.
> Maybe there is enough weight left at the end to design the hull
> without any framing and still be possible to tow without a
> monster truck.
>
> Ian.
>
> On Tue, 21 Jan 2003 00:26:42 +0800
> "Warrend Greenway" <dub@linuxmail.org> wrote:
>
> > Well then, best of luck Alec! The OSS will still be around when you
> > are finished with your present project...And we'll be glad to have
> > your input!
> >
> > Warren.
> >
> > > Yep. Its not that I didn't have a pressure hull design to begin with, its just that I treated it as very much a draft until the other stuff was a known quantity. As I completed components I would weigh them (in one case going so far as to weigh them submerged in a tub of water) and recalculate the hull. At least in my design, weight is the absolutely critical factor. I have a fudge factor of only a few hundred pounds in a boat that weighs 3,000.
> > >
> > > BTW I really would love to volunteer for the hull position but just don't have the time, due to the construction of my own boat. In fact, I don't even have time to keep up with all these posts, and caught Ian's just by chance.
> > >
> > > On the other hand when my sub is complete and proven to work, I do intend to put its design in the public domain, so it will be "open source". But its a poor candidate for THE open source design, as its of very specific applicability and probably not of interest to the general PSUBer.
> > >
> > > rgds,
> > >
> > > Alec
> > >
> > > -----Original Message-----
> > > From: Ian Roxborough [mailto:irox@ix.netcom.com]
> > > Sent: Sunday, January 19, 2003 7:04 PM
> > > To: personal_submersibles@psubs.org
> > > Subject: Re: [PSUBS-MAILIST] OSS Pressure Hull
> > >
> > >
> > >
> > >
> > > Once you know what all the other systems are going to
> > > weight and the volume they will displace, you can use
> > > up the remaining weight allowance on the pressure hull.
> > >
> > > You would still want to know the specs, such an estimate
> > > of the displacement, basic layout/dimensions, etc.. But
> > > the actually metal design part, thickness of the steel,
> > > spacing of the ribs, design of the ribs/frames, the
> > > end cap style and the placement of the thru-hulls don't
> > > have to be designed until later on.(?)
> > >
> > > If I remember correctly, Alex Smyth designed this submarine
> > > this way.
> > >
> > > Ian.
> > >
> > >
> > > On Mon, 20 Jan 2003 07:31:06 +0800
> > > "Warrend Greenway" <dub@linuxmail.org> wrote:
> > >
> > > > Huh? Why do you suggest that?
> > > >
> > > > Warren.
> > > >
> > > > >
> > > > > I'm wondering what other people think about designing
> > > > > the pressure-hull after some of the other systems
> > > > > have been designed, maybe even designing it last?
> > > >
> > > > >
> > > > > Ian.
> > > > >
> > > > >
> > > > >
> > > > > On Mon, 20 Jan 2003 05:07:12 +0800
> > > > > "Warrend Greenway" <dub@linuxmail.org> wrote:
> > > > >
> > > > > > Is anyone interested in volunteering for the pressure hull design positions?
> > > > > > We need a Lead of Design, and developers. Once a pressure hull team comes together,
> > > > > > you can revist the hull concept if you desire, and design the hull anyway that is
> > > > > > compatible with the weight/cost/depth constraints. If any one is interested, please
> > > > > > post or e-mail me. I will be posting a supplementary document that will describe
> > > > > > Lead and Developer opening.
> > > > > >
> > > > > > Warren.
> > > > > > --
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