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“The inefficiency is off the charts”

Big time. And I’m assuming the amount of energy obtained when the compressed air is put to work can’t be greater than the energy used to compress the air, which includes BOTH the energy heat energy given up when the air is compressed AND the work it took to compress the air in the first place. And then on top of all of that, when the air performs work as it is uncompressed, it draws back all of the heat it lost when compressed.

It strikes me that this scheme isn’t too much different than trying to use a refrigeration system as a propulsion system. I bet you end up with something like 80% of the total energy inputs being wasted.

And then on top of that, how much actual work can you get out of a, let’s be generous and say 100 gallon tank, at 4400psi of compressed air? Enough to accelerate a 2 ton vehicle to 75mph 2-3 times and then drive it for, what, 3-4 miles after each acceleration? Oh, and the noise of that compressed air uncompromising has to be ungodly. Anybody every hear a supersonic wind tunnel in action, where a few thousand gallons of highly compressed air are suddenly released through a small orifice?

This whole thing sounds to be less feasible than using Unicorn farts.

(BTW, I’d love for an actual engineer to provide real energy and power numbers for my above suppositions.)

Zero P website ain’t real heavy on info. They show three variations in pics including a delivery car.

Must have a deep cycle battery. Joystick to steer; three wheeler setup with a twin front wheel that looks like solid rubber forklift/ pallet jack tires from what little I could tell. If they are solid then chunks will be lost and it will ride even rougher. Maybe mower tires. Probably no spare for the back.

$11,000. Has a four hour onboard compressor; did not say to what pressure. Wiper and lights. Heat and A/C who knows? I think high side winds will be a risk. They listed 617 pounds. Fiberglass/ composite construction-— it really should have a roll-bar.

They should be able to sell some of these to congested urban areas. For large industrial sites or airports I don’t think that compressed air vehicles are a bad idea if in a more utilitarian body format.