The provocative press release was still live in 2023, 16 years after its creation, on the Tata Motors corporate website. Dated February 5, 2007, and titled “An Engine Which Uses Air as Fuel,” the ...

Compressed air isn’t really a practical form of energy storage for headline uses like transport or heating, but it’s a fun thing to tinker with at the small scale. [Tom Stanton] is plenty experienced ...