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Re: [PSUBS-MAILIST] Through Hull stuff



What's so difficult about hull penetrations?

Brian

----- Original Message ----- 
From: "Andy Jensen" <drewacard@charter.net>
To: <personal_submersibles@psubs.org>
Cc: "George Slaterpryce" <gslaterp@hotmail.com>
Sent: Monday, April 10, 2006 11:36
Subject: Re: [PSUBS-MAILIST] Through Hull stuff


> Why not attach LED's to a view port you it would work like a TV remote max data rate could be up to 1 MB with common I R.
> 
> Andy J.
> 
> ---- George Slaterpryce <gslaterp@hotmail.com> wrote: 
> On the point of through hull penetrations, as an aside, if you have purely 
> data-only cables you can make a dataport that goes through the hull without 
> penetrating it using read switches and electromagnets. I've tested a three 
> wire setup for sending binary data. two bits plus a pulser. It's not very 
> fast compared to using a straight hookup... think of it as binary morsecode 
> but it works.
> 
> You're input would look something like
> 
> Port 1 | Port 2 | Port 3
> 1          0          0
> 0          0          1
> 0          0          0
> 1          0          1
> 
> Every time port 3 changes you "Sample" the feed, so you would end up with 
> something like
> 10000010
> 
> Port 3 would be there solely to indicate when new data (and complete) data 
> is ready to be read. otherwise when you send the exact data back and forth 
> (as the two sends of 00) it might misread it as only a single send.
> 
> Incedently that whole thing would just produce the number 65 or the letter 
> A.
> 
> George Slaterpryce
> ----- Original Message ----- 
> From: "Smyth, Alec" <Alec.Smyth@compuware.com>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, April 10, 2006 1:11 PM
> Subject: RE: [PSUBS-MAILIST] structural question
> 
> 
> > Vance,
> >
> > Wouldn't the most elegant solution be to leave the cylindrical hull 
> > intact,
> > but put your speed controllers on the outside? That way the heavy gauge
> > cables don't need penetrators, and all you bring into the hull are the
> > skinny control cables. I'm assuming the motivator here is to minimize
> > penetrators?
> >
> > cheers,
> >
> > Alec
> >
> >   _____
> >
> > From: owner-personal_submersibles@psubs.org on behalf of Dan H.
> > Sent: Mon 4/10/2006 8:42 AM
> > To: personal_submersibles@psubs.org
> > Subject: Re: [PSUBS-MAILIST] structural question
> >
> >
> > Vance,
> >
> > I'm not the guy to do the calculations but I'd bet you would need to
> > reinforce the slot your taking out of the hull tube similar to the way you
> > have to reinforce around a viewport.  The forces in the hull tube would be
> > trying to close your slot and would have to be carried across the opening
> > with something substantial.  More then just the ribs in that area.
> >
> > Also, with the batteries in a box like that you would loose the protection
> > in case of a battery explosion.  The way it is now, the pod end cap will
> > blow off but you won't flood or get hit.     But,  Maybe battery 
> > explosions
> > aren't such a big problem as I was led to believe.
> >
> > Dan H,
> >
> > ----- Original Message ----- 
> > From: vbra676539@aol.com <mailto:vbra676539@aol.com>
> > To: personal_submersibles@psubs.org 
> > <mailto:personal_submersibles@psubs.org>
> >
> > Sent: Sunday, April 09, 2006 1:22 PM
> > Subject: [PSUBS-MAILIST] structural question
> >
> > I'm planning on another K-sub, but thinking about a box keel like the
> > Nektons and Delta had, rather than pods. Has anyone got an idea about how 
> > to
> > figure structure on something like that? The Nekton's box was 9/16" wall,
> > flat side and bottom, and reinforced with flat plates running athwartships
> > on 18" centers (more or less). The hulls were the same thickness and the
> > same material (A516 Grade 70).
> >
> > I'm wondering if there would be any penalty to building a 1/2" thick box
> > with 1/4" dividers matched to the ring stiffeners in the hull (ie., 12"
> > centers). The box would be a foot square in cross section, and if all 
> > seems
> > well, would be welded through a slot in the hull and covered inside with a
> > reinforced aluminum deck plate gasketed and vented for charging. If the
> > pressure hull is six feet long in the cylinder, that would give me room 
> > for
> > a grunch of 85 amp deep cycle batteries (more than called for) and still 
> > not
> > kill my payload.
> >
> > Anyone not familiar with K-subs might think all this sounds pretty heavy.
> > Have a look at the lead load in Dan's boat, if you think we don't have it 
> > to
> > spare.
> >
> > Vance
> >
> >
> >
> >
> > The contents of this e-mail are intended for the named addressee only. It
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> > disclose
> > it to anyone else. If you received it in error please notify us 
> > immediately
> > and then destroy it.
> >
> > 
> 
> 
> 
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