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

[Jon Wallace <jonw@psubs.org>]

Dean,

I believe the purpose of the microspheres is to take up space between 
the macrospheres for the purpose of limiting the amount of binder and 
thereby increasing the buoyancy.  According to Cliff's slides 
http://www.psubs.org/design/PDF/SyntacticFoam.pdf he got a density of 
25.9 using a combination of micro and macro spheres.  If you use only 
macrospheres, your density will go up due to the additional binder 
weight and of course the potential buoyancy will be reduced.

Jon



Recon1st@aol.com wrote:
> *I am building some floatation using syntactic foam.*
> ** 
> *I am wondering why a container with just the maxispherse in it, do 
> the job.*
> *Naturally the container would be free flooding and draining and be 
> strong enough*
> *to support the floatation.*
> ** 
> *With the ability to add or subtract the spheres I gain flexibility 
> something I really like.*
> *Any one got any thoughts on this?*
> ** 
> *Dean*




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