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Comment by ACCount37

7 hours ago

Again: current day CNG ICEs don't actually have "fuel tanks bigger than the car".

That's because they use high-pressure tanks.

Actually higher working presure than regular welders' oxygen tanks.

Too bad the higher the pressure, the heavier the tank, especially steel.

I had a pretty good job offer from a company that was going to start building CNG tanks out of carbon fiber.

This was a few years before the failure of the Titan submersible.

CNG has made some progress since then, here's the kind of thing there is now:

https://steelheadcomposites.com/sites/default/files/2024-01/...