Re: [PSUBS-MAILIST] lazy man's syntactic foam

["Alan James" <alanjames@xtra.co.nz>]

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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