[PSUBS-MAILIST] inner tube bladder

[Alan via Personal_Submersibles]

Hank,
I like the purpose built flexible gas tanks because they are easy to fill & empty,
& built for the purpose. Don't fancy filling an inner tube with gas through a valve!
I had suggested before that if you were doing long transits with your sub you 
could fill up those flexible tanks at a gas station at your destination. Maybe pour
their contents back in your car for the return trip! ( or did you say you were running
deisel). 
You need some sort of structure to support them, so why not ( as previously suggested)
build fibreglass tanks with some sort of diaphragm for the small bit of equalisation
you may need!
Alan


Sent from my iPad

> On 18/07/2017, at 11:55 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
> When you mentioned using gasoline for buoyancy and showed a nice bladder for fuel, I did a test.  I though about what would be the lowest cost bladder to hold gasoline.  I thought of an inner tube, so I went to my inner tube spot on the shelf and cut sample pieces and put them in a jar with gasoline. I don't remember how long ago that was now but I just checked the sample and the inner tube rubber appears unaffected.  When I googled the idea, I did not find positive information, so a test was in order.  I also have a long running test of an inner tube with oil in it, for over a year now I have been testing that, so far all is good.
> Hank
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