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Hi Benny I'm not familiar with it,
but anything thats produced in mass like it would
be, would have a lower cost.
Be interesting to stick some in a vice & see
how tough it is. (not while on someones arm)
Alan
----- Original Message -----
Sent: Sunday, April 25, 2010 5:59
AM
Subject: Re: [PSUBS-MAILIST] lazy man's
syntactic foam
Not to seem completely random, but what about that foam
rubber that hospitals use for splints and casts... Its heated up,
formed then allowed to cool and harden. From what i remember when
i broke my wrist its tuff stuff.
--- On Fri, 4/23/10, Recon1st@aol.com <Recon1st@aol.com>
wrote:
From:
Recon1st@aol.com <Recon1st@aol.com>
Subject:
Re: [PSUBS-MAILIST] lazy man's syntactic foam
To:
personal_submersibles@psubs.org
Date: Friday, April 23, 2010, 8:55
PM
Thanks Alan, I will do some computer digging and see if I
can find it. It sounds like I
would have an application for some of it.
Dean
In a message dated 4/23/2010 6:09:21 P.M. Central Daylight Time,
alanjames@xtra.co.nz writes:
Hi Dean,
I've had no luck tracking down the foam info. I did have a
booklet on it.
It was made in Australia & I thought it was something like
Davini foam
I was looking at using it as a core in a fiberglass laminate.
From memory
it came in sheets & you didn't need a lot of heat to form
it. There were differing
grades of compression & it was used on submarines.
Alan
----- Original Message -----
Sent: Saturday, April 24,
2010 8:52 AM
Subject: Re: [PSUBS-MAILIST]
lazy man's syntactic foam
Alan the box I am referring to would be hydrodynamic.
Basically the same shape as if
I were to form standard foam as Cliff did on his sub.
Just wondering if I have to add
the binder mixture and make it
permanent.
What type of foam can be heated and formed. I am not
familiar with this product?
Dean
In a message dated 4/23/2010 3:48:04 P.M. Central Daylight
Time, alanjames@xtra.co.nz writes:
Hi Dean,
The syntactic foam I've looked at can be
heated & formed, so you could
place it in areas &
ways that are hydrodynamic rather than in a box that
sounds
like an item that would cause drag.
Alan
-----
Original Message -----
From: "Jon Wallace"
<jonw@psubs.org>
To:
<personal_submersibles@psubs.org>
Sent: Saturday, April
24, 2010 8:17 AM
Subject: Re: [PSUBS-MAILIST] lazy man's
syntactic foam
>
> Sorry, I misread your
original post. So you're thinking of just putting
>
the macro-spheres in a free flooding container, no binder at
all. Other
> than a deep water test to ensure the
rating of 250psi is accurate, you
> might also consider
the effects of any trapped air that might occur
> between
the spheres deep within the container. I have no idea if
there
> would none, some or lots, but any air that does
get trapped it compress
> and vary your buoyancy.
Of course this may not be enough to worry about
> but
just something to keep in the back of your head.
>
> Also Dean, do the "winnowing" as recommended by Cliff
(slide 14 in
> syntactic foam slide set) to get rid of
any spheres that might be
> malformed or broken.
>
> Jon
>
>
>
> Recon1st@aol.com
wrote:
>> *Jon and Frank. The spheres I have are rated
to 250psi with 100%
>> survival.*
>> *I am
thinking that with out the binder and microspheres they should
>> do the job.*
>> *The abrasion is a thought
but they are tough little buggers, can't
>> imagine
that being*
>> *a concern. *
>> **
>> *I can picture even pressure around each sphere
except for it's
>> buoyancy, and those *
>>
*below it. *
>> **
>>
*Dean*
>>
>
>
>
>
>
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