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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