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Re: [PSUBS-MAILIST] Glass microspheres idea

Wow. Rube Goldberg would love it. Seriously though, why the extensive effort to avoid syntactic foam? Syntactic foam is microspheres in epoxy. If you put them in a container with air spaces between them, they won't be incompressible. The housing would have to support itself. Why not use foam? 
Rob


djackson99@aol.com wrote:
Sorry for not being clear; yes I am thinking of building floats. The idea is to have an easy syntactic foam replacement that takes advantage of the higher psi glass bubbles and offsets their higher density by just filling a fiberglass container with them instead of adding them to a epoxy resin as normally done from creating syntactic foam.
To build the container, you could cut styrene foam to fit your hull shape and desired external shape, then cover the styrene foam with a durable layer of fiberglass. You might want to embed aluminum sheeting for armor, especially on the external side but also for mounting tabs that will make it easy to bolt the float onto the hull. Then drill a hole through the fiberglass; dissolve the styrene foam with acetone; refill the container with glass bubbles; and seal the hole. 
--Doug J
www.submarineboat.com
-----Original Message----- 
From: emile@airesearch.nl
To: personal_submersibles@psubs.org
Sent: Sun, 22 Apr 2007 2:37 AM
Subject: RE: [PSUBS-MAILIST] Glass microspheres idea

Doug,
(most of) The space will be consumed. Is your idea only for buoancy reason?? Regards, Emile ------------------------------------------------------------------------ *Van:* owner-personal_submersibles@psubs.org <javascript:parent.ComposeTo("owner-personal_submersibles%40psubs.org", "");> [mailto:owner-personal_submersibles@psubs.org <javascript:parent.ComposeTo("owner-personal_submersibles%40psubs.org", "");>] *Namens *djackson99@aol.com <javascript:parent.ComposeTo("djackson99%40aol.com", "");> 
*Verzonden:* zondag 22 april 2007 6:58
*Aan:* personal_submersibles@psubs.org <javascript:parent.ComposeTo("personal_submersibles%40psubs.org", "");> 
*Onderwerp:* [PSUBS-MAILIST] Glass microspheres idea
I was wondering about using glass microspheres and air as a filler in a fiberglass compartment. For example, build a figerglass tank, then fill it with 10,000 psi glass bubbles and seal it off. I know each sphere would be loaded at points of contact with it neighbors but I seems like it would work to at least 3000 ft. 
Please let me know what you think.

Here is a link to 3M's Selection Guide:
http://multimedia.mmm.com/mws/mediawebserver.dyn?FFFFFFoMYRUF&i2Fsi2FFFSzlqBeeeeD- <http://multimedia.mmm.com/mws/mediawebserver.dyn?FFFFFFoMYRUF&i2Fsi2FFFSzlqBeeeeD-> 

Doug J
Tulsa, Ok
www.submarineboat.com <http://www.submarineboat.com>
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begin:vcard
fn:Rob Bryan
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note;quoted-printable:Don't worry about people stealing an idea. If it's original, you will hav=
	e to ram it down their throats.=0D=0A=
	            -- Howard Aiken=0D=0A=
	
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