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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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