[Gorjus]

Haven't had a chance to look at this yet, but the energy efficiency of cold air is just horrible. We can't even use it to start a jet engine once, not with reasonable size bottles.

I suppose with a zillion psi or so you could store enough energy to be useful - but that would make one heck of a bomb, or cut through just about anything if it ever developed a leak.

My take on it is that cold air (meaning compressed, but not combusted for power) becomes dangerous before it becomes useful as a power source. Of course, with a low enough horsepower requirement, you can make a lot of things work. But I wonder if an equivalently sized gasoline/diesel engine might not be better overall for pollution and fuel use, once you figure in the need to have some way to compress that air in the first place.

[aligncare]

Science has solved problems before that were thought impossible to solve. The car is already in production.

Nothing says success - like success.