[SwordofTruth]

"Don't become a firefighter then. We have tanks at 4500 psi on our backs every time we go into a fire."

I didn't realize this. How safe are those tanks?

[Richard Kimball]

I've never had a problem. They're filled in an explosion proof container, and have to be hydrostatically tested every five year, then retired at fifteen years of age. NFPA and DOT have some serious regulations on manufacturing, etc. They also have pressure relief devices to vent if the cylinder is involved in a fire.

Carbon fiber tends to split instead of exploding, but I suppose it's possible. A lot of people here are questioning the viability of the vehicle, but the compressed air at 4500 psi could probably be handled pretty easily using conventional technology and some explosion containing baffles that would direct the air flow downward.

I have no idea whether the car would be as energy efficient as advertised, but the air compression technology, from what I can tell, is pretty much off the shelf.