[alien]

thats a CO2 tank though... its more alike to a fire extinguisher than the air tanks:



either way, the air tanks are just made by luxfer and other such companies, they were not originally specifically designed to take a superman dive into the dirt.

My point wasnt that its a stronger design, it was just that it wasnt ever intended to take the abuse literally at the hands of people - but it does, and its been proven safe through years of use by hundreds of thousands, if not millions of people.

[e-van]

i hope it wont catastrophically fail, if it did im hoping that it wont crack any windows! i test the safety valve before i pump it up to make sure it hasnt seized, i would never use any sort of pressure vessel with out one. for example you could fill up the tank and then a hot day in the car could cause a signicant pressure increase, probably not enough to cause you problems but just a thought.

i did look into painball and the 100L sodastream bottles (they call them "100L" because they make approx 100L of fizzy fun drinks... stupid) but for price fire extinguishers are pretty cheap. places that sell fire extinguisers might have a few out of date bottlesthat would be going really cheap if you get my drift...

oh and the acid, yeah that powder they use to put out fires is a real bitch to get out of the bottle, even pvc primer fluid wouldnt get it to budge. (got a few stranges looks buying acid and priming fluid fromt the hardware shop)

i agree neck is weak point but being secure and nothing around to hit it i will give it a go.

[SierraDan]

If you don't drive around/wheel with it pressurised you should be sweet anyway.

[shabz]

Fatzook wrote:

I've seen that done before. But a single larger tank was used.

Your setup looks very bulky. Where in the car will you be mounting all of that?

EDIT: I re-read your post. Not familar with the jack storage area on a jimny, so I'll have to wait for pics.

IMO you should make a cradle to sit both bottles side by side. That will save some space for sure!

The underfloor storage compartment in the back of a GV can 4 of these bottles, another 2 bottles setup the same way as e-van did

Good work mate

[Polar_Bear]

Just use a 2 litre coke bottle, you would be surprised on how much pressure they can hold.

Easily 120 psi

[Chop]

Thats what i though shabz, when i put some carpet in it to stop shit rattling around. i have one of those ozito CO2 power system tanks that will fit in there.

[ozsteve]

ive got an old one in the back shed might have to try this

[royce]

I cant see it failing due to pressure or even driving around, just keep the necks and fittings protected so nothing can hit it (like a normal gas bottle) and I doubt youll have anything to worry about

[want33s]

e-van wrote:

i etched the inside of the bottles with hydrochloric acid and have lined them with resin, to prevent rusting.

My fire extinguishers are all aluminium.... so rust isn't an issue.

I would suggest trying to mount the bottles neck down so that a drain valve can still be used.
I would also mount the bottle necks lower than the compressor output so any build up of water won't backup into the compressor valves or piston.

[SQUIRREL]

Old minature argon cylinders look about the same
Size as the fire extinquisher tanks & have a 165bar rating
They seem strong as all hell & may be worth a shot
There the units you can use on ye ol cheapo mig welders
Other than that I modded an old airhorn system ( the style with a tank )
Trying to post pix this week

[SQUIRREL]

got air ?

[brendan]

depending if you wana trust it or not theres heaps fo small cheap aircompressors and tanks on ebay. i got a twin tank air compressor on ebay and just took the compressor off and used the 2 tanks

[ablouse]

if your looking for old extinguishers landfills stock pile them with bbq bottles etc for disposal just next time your in there with the trailer just grab a couple they wont care