History A similar basic technique was used during World War II by Luftwaffe aircraft with the GM-1 system to maintain the power output of aircraft engines when at high altitude where the air density is lower. Accordingly, it was only used by specialized planes like high-altitude reconnaissance aircraft, high-speed bombers and high-altitude interceptors. It was sometimes used with the Luftwaffe's form of methanol-water injection, designated MW 50 (both meant as Notleistung short-term power boosting measures), to produce substantial increases in performance for fighter aircraft over short periods of time, as with their combined use on the Focke-Wulf Ta 152H fighter prototypes. British World War II usage of nitrous oxide injector systems were modifications of Merlin engines carried out by the Heston Aircraft Company for use in certain night fighter variants of the de Havilland Mosquito and PR versions of the Supermarine Spitfire. See also Car tuning Turbocharger Water injection Racing games References External links Howstuffworks "How does nitrous oxide help an engine perform better?" Vehicle modifications Engine technology Gas technologies