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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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