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RE: [PSUBS-MAILIST] OSS Modeling Ideas
This is a very good question, best addressed to the battery manufacturer.
Depending on the depth, you might be better served to enclose the batteries
in pressure vessels. Partial equalization could be achieved, but if you are
going to subject the battery cases to anything over 3 atm, I would think
they would crack or at the very least deform the case.
Texas Lake Diver
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Warren
Greenway
Sent: Sunday, April 27, 2003 11:22 AM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] OSS Modeling Ideas
I guess I prefer something that can't leak. What about
a glass micro beads? I have seen them used for things
like this, and they are pretty cheap. Forget the epoxy
I mentioned earlier, it would work but would be a one
time deal. What kind of equal pressure can a sealed
gel cell take?
Warren.
--- martlet1 <martlet1@sbcglobal.net> wrote:
> Another option is pressure compensation with inert
> gas (helium or argon).
> No ignition hazard with any hydrogen gas produced by
> the batteries,
> reversible, and relatively cheap.
>
> Texas Lake Diver
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On
> Behalf Of Warren
> Greenway
> Sent: Saturday, April 26, 2003 12:12 PM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] OSS Modeling Ideas
>
>
> Try pressure compensation with epoxy. If the battery
> hull is the correct dimensions, it might just be
> possible. They sell thermal conductive, electrical
> insulative epoxies that you can fill with glass
> beads.
> This is somewhat expensive, and completely
> irreversible,
> but would work.
>
> Warren.
>
> --- Thijs Struijs <thijs-struijs@planet.nl> wrote:
> > Warren,
> >
> > A little late reaction, but i was on a vacation
> for
> > week. I will try to get
> > some ideas on paper. The problem is that i don't
> > know yet where to locate
> > the batteries. When placed internaly they won't
> > contribute to the stability.
> > When placed exterior they should be
> > pressure-compensated or in a bulky
> > pressure resistant container. Pressure
> compensation
> > with oil isn't an option
> > after reading Busby. Pressure compensation with
> air
> > was my favorite until
> > Michael Wludarczyk (his e-mail from april 15)
> > pointed out that that might be
> > dangerous. I will check the archives for this
> > matter.
> >
> > Greatings,
> >
> > Thijs Struijs
> > ----- Original Message -----
> > From: "Warren Greenway" <opensourcesub@yahoo.com>
> > To: <personal_submersibles@psubs.org>
> > Sent: Monday, April 21, 2003 9:43 PM
> > Subject: Re: [PSUBS-MAILIST] OSS Modeling Ideas
> >
> >
> > > Hey, Thjis, have you given any thought to the
> > external
> > > tank layout? I was playing around with ari,
> > ballast,
> > > and batteries, trying to figure out where they
> > should
> > > go. Your hull concept is naturally very sleek,
> so
> > it
> > > would be nice if we could keep it that way.
> > >
> > > Warren.
> > >
> > > --- Thijs Struijs <thijs-struijs@planet.nl>
> wrote:
> > > > Jeremy,
> > > >
> > > > Very nice pictures. I am sure that this will
> > help in
> > > > the discussion. Even
> > > > people with no 3D-imagination can follow.
> > > > I made a mock-up of the Double endcap sub out
> > of
> > > > plastic pipe. I made a
> > > > floor in it of about 600 mm long and 300 mm
> > wide. I
> > > > was thinking of a seat
> > > > that can be changed in height from 150 to 300
> > mm.
> > > > The seat must be foldable
> > > > or removeble so you can sit on knees from time
> > to
> > > > time. It will never be
> > > > very comfortable but even famous subs like
> Star
> > III
> > > > (Busby p. 461) demand
> > > > some flexiblity of the crew.
> > > > As for the two-seater i was thinking of a
> > scooter
> > > > buggy seat. The hull could
> > > > be equiped with 2 acrylic hemispheres on both
> > sides
> > > > like big fish-eyes.
> > > > I am on a vacation the next week so i will be
> of
> > > > line for some time.
> > > >
> > > > Good luck,
> > > >
> > > > Thijs Struijs
> > > >
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Jeremy Crawford" <ISMASC@hotmail.com>
> > > > To: <personal_submersibles@psubs.org>
> > > > Sent: Saturday, April 19, 2003 12:50 AM
> > > > Subject: [PSUBS-MAILIST] OSS Modeling Ideas
> > > >
> > > >
> > > > > I did some thinking about doing some
> modeling
> > for
> > > > OSS but that is a pretty
> > > > > vague situation. So my first thought was to
> > look
> > > > at Seating arrangments.
> > > > I
> > > > > setup about six different two man
> > arrangements. I
> > > > used a standard
> > > > cylinder
> > > > > hull for half and then used Thijs Idea of
> the
> > > > Double endcap for the other
> > > > > half. So if people interested could look
> and
> > > > weigh in on what seating
> > > > > configuration they like best, that would
> point
> > me
> > > > in the right direction.
> > > > > ALSO if you have a different idea please
> send
> > it
> > > > in and I can add it for
> > > > > consideration. Mind you this is for
> modeling
> > > > Ideas only I am not using
> > > > this
> > > > > to steer the direction of OSS. I just want
> to
> > > > come up with some models
> > > > that
> > > > > can be used for determining design direction
> > if
> > > > people choose to use them.
> > > > >
> > > > > http://www.batts.org/oss/seating.htm
> > > > >
> > > > > Also Thijs I know you had the Idea of
> having
> > the
> > > > Endcaps on their side.
> > > > I
> > > > > will incorporate a seating model for this
> > soon.
> > > > >
> > > > > Thanks,
> > > > > Jeremy
> > > > >
> > > > >
> > > >
> > >
> >
>
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