high pressure tanks in vehicles

John Teller jsteller at spottydog.us
Sat Jan 21 15:27:43 CST 2012

Really, there's not much more danger in compressed air bottle than in 
the 24 kW-h lithium-ion battery in a Nissan Leaf.


On 01/21/2012 03:06 PM, Michael Chisena wrote:
> All,
> Some time back I had to transport an electronic weapon from where we 
> were testing back to NRL.
> It was a high power RF source that worked buy dumping a lot of DC into 
> an antenna via a spark gap.
> To run the voltages up before the spark gap fired, the gap and antenna 
> assembly was in a resin pressure tank.
> The whole system fit just fine into a Pelican case.
> If I remember the specs right, the thing wanted nearly 800psi of dry 
> nitrogen, the best we could get out of our tank / regulator was about 
> 600psi.
> More than enough for the days test program.
> Lots of energy in that box.
> I saw what this thing did to some electronic test items when triggered.
> Killed them dead.
> A few hours later, it's sitting in my truck, in a power down state but 
> the tank pressure was still up there.
> If that pressure tank had failed there is no way the pelican case 
> would have held that much energy back.
> The frag from the tank and the case would have been impressive.
> There would have simply been a thin haze of Italian out the drivers 
> side window.
> A very ginger trip back to HQ for sure.
> I have to admit that the idea of a compressed gas vehicle makes me 
> twitch a bit.
> There is a huge amount of energy in compressed gas.
> Most normal drivers have never had to deal with a vehicle trying to 
> 'run away'.
> It's happened to me a few times in 30 years.
> Where the throttle sticks near wide open.
> In a vehicle with an ignition system, it can be turned off, and after 
> a moment the parts stop spinning.
> How would one shut down a stuck open air valve running as a throttle?
> Could be an exciting ride.
> Keep it safe
> Mike
> http://en.wikipedia.org/wiki/Compressed_air_car
> Michael F. Chisena KA2ZEV at Yahoo.com 703 863 4574 "You are, what you 
> do, when it counts" The Masso
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