[PSUBS-MAILIST] syntactic foam.

[Alan via Personal_Submersibles]

Hank,
have you looked at using gasoline?
More volume required for the same floatation as syntactic foam,
but apart from the holding tanks it would cost you nothing, as you
could use it after the dive. If you designed right you could fill the tanks
at your destination.
Alan

Sent from my iPad

> On 12/06/2017, at 6:03 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Greg,
> that sounds good, I would love to find a more cost effective foam.  I still want to build one more sub that goes much deeper, but the foam cost is not manageable.  I estimate I can build a  Titanic capable sub  for 100,000 and 80,000 of that is foam.  ;-(
> Hank
> 
> 
> On Sunday, June 11, 2017 8:29 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Greg,
> There has to be good reason to make foam by other means than standard practices.   Cost would be the biggest reason, and using wax will probably work, but is there a saving?  Using wax means you have to use a deeper rated sphere to offset the loss of reinforcement provided by the resin.  I have no idea what the cost difference would be.  Maybe the cost is still much better.  When I look at Cliff's report, the resin is not the expensive part.  Perhaps the direction should be, to look for a replacement for the spheres.  In Cliff's report it shows the resin triples the sphere's performance.  That implies that the true strength comes from the resin.  Maybe a sawdust resin or a styrofoam granule resin is worth looking at also.  Maybe it is a simple as air entrained resin?
> Fun to think about anyways.
> Hank
> 
> 
> On Sunday, June 11, 2017 6:22 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hi Scott,
> Thanks for the offer, but I need foam for 3,000 feet.
> Hank
> 
> 
> On Saturday, June 10, 2017 9:03 PM, Scott Waters via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hank,
> 
> Hola from Costa Rica!
> 
> Depends on if they are glass or carbon fiber spheres and what size they are. They are all pretty durable. We are actually cutting up the foam on Pisces and reattaching it to get the shapes we want. 
> 
> I do have a ton of syntactic foam that is cert to 400m that I'd sell you for super cheap. Like all of it for $200
> 
> Thanks,
> Scott Waters
> 
> 
> 
> Sent from my U.S. Cellular® Smartphone
> 
> -------- Original message --------
> From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> Date: 6/10/17 12:38 PM (GMT-06:00)
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: [PSUBS-MAILIST] syntactic foam.
> 
> I have an idea, but not sure if it will work.  My idea is to fill a neutrally buoyant container with macro and micro spheres.  After the container is as full as possible, then fill with an environmentally friendly oil.  This would be more buoyant than using a resin and less complicated and cheaper.  My concern is, how well will the spheres stand up against breaking from being in contact with the other spheres and the container.   Are these spheres delicate?  
> Hank
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