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Re: [PSUBS-MAILIST] shapeable incompressable filler..any ideas?
I'm assuming that the incompressable filler is to reduce the mass of the
water filling the voids. This makes sense if you are trying to reduce mass,
but it will add bouyancy. Also, what type of plaster are you talking about?
Most plasters I know of are soluable in water. Do you mean plastic resin?
I've jumped in the middle of this, so maybe I'm missing something.
Suds
>From: CARRO@wans.net
>Reply-To: personal_submersibles@psubs.org
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] shapeable incompressable filler..any ideas?
>Date: Thu, 11 Jul 2002 19:26:45 -0500
>
>I am concerned about corrosion occurring between your
>structure and filler material. Small voids under
>pressure are going to fill with water and not drain
>out well. Further, I'm not sure why you want to fill
>these voids, as they would weigh nothing out of the
>water and be filled with neutral buoyancy in
>compressible water when in use. If you need extra
>flotation why not make a few ridged air canisters?
>Please excuse me if I haven't grasped the situation
>correctly.
>--- Original Message ---
>From: Erik Michael Muller <emm03@uow.edu.au>
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] shapeable incompressable
>filler..any =?us-ascii?q?ideas=3F?=
>
> >Hello Marcus, and everyone.
> >Thanks for your ideas..once again, the combined brain
>power of this
> >mailing list has awe-inspired me!
> >It is interesting, Marcus, I had a major revelation
>last night duing a
> >bout of insomnia, and it occured to me that
>superballs were not very
> >compressable (high resitituion too).
> >
> >My brain rambled on and I thought it might be
>possible to either use
> >a big slab of neoprene rubber (not the foamy
>compressable wetsuit
> >kind, but the solid rubber variety). although I think
>this might be
> >expensive, so I thought I might be able to mix up a
>plaster+granulated
> >neoprene conglomerate. Some serious work would have
>to go into
> >checking exactly what ratio would be the most
>durable, though even an
> >integrity (sp) failure here wouldnt matter (i.e. it
>has no airspaces
> >and cant crush, even if it cracks I wouldnt like it
>too, just because
> >it looks messy), since the only function of the stuff
>is to fill
> >volume.
> >
> >The reason a conglomerate might be more useful is
>that rubber is less
> >dense than water, whereas plaster (which IS
>waterproof) is more dense.
> > The combined mix (depending on the ratio) might be
>at a similar
> >density to water.
> >Although the durability is not a safety concern, I
>would still like to
> >vary the rubber/plaster ratio and test it out (since
>I suspect that
> >plaster IS slightly porus!)..anyone with a boat who
>wants to sink a
> >few test bricks of this stuff to a few atms?
> >
> >
> >-------------------
> >> Hello Everyone,
> >>
> >> I was reading the machinery's handbook back at work
>and i found out
> >that
> >> rubber,
> >> although very elastic, isn't at all that
>compressable. Could Erik
> >use lots
> >> of rubber band
> >> in this purpose, maybe bonded as needed to keep it
>in shape? Any 1$
> >store
> >> could
> >> provide lots of them.
> >>
> >> just a thought,
> >> Marcus
> >>
> >>
> >> ----------
> >> ALLEN'S AXIOM
> >> When all else fails, read the
>directions.
> >>
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