More info about that F-16 EPU: https://news.ycombinator.com/item?id=21373197 https://news.ycombinator.com/item?id=21373197 https://aviation.stackexchange.com/

More info about that F-16 EPU: https://news.ycombinator.com/item?id=21373197 https://news.ycombinator.com/item?id=21373197 https://aviation.stackexchange.com/questions/23417/why-is-hydrazine-used-to-power-the-f-16s-epu https://aviation.stackexchange.com/questions/23417/why-is-hy... It's basically a small gas turbine powered by catalytic decomposition of hydrazine (the same highly energetic reaction used in hydrazine monopropellant rockets, but applied differently). (This is one of the oldest ideas in turbine history. The turbopump in the original Nazi V-2 rocket was powered by the catalytic decomposition of hydrogen peroxide. That's not to be confused with the rocket propellants, which were ethanol + liquid oxygen. It's the small-but-powerful pump that pressurizes the propellants flowing into the combustion chamber). edit: (Basically, these are same things as jet engines, except there's only propellant instead of two (fuel + oxidizer). It's simpler).