thumb|The Pratt & Whitney J58 (JT11D-20) [[turbojet aero engine, which had a specific fuel requirement; namely JP-7 turbine fuel.]]
thumb|The Pratt & Whitney J58 (JT11D-20) [[turbojet aero engine, which had a specific fuel requirement; namely JP-7 turbine fuel.]]
Turbine Fuel Low Volatility JP-7, commonly known as JP-7 (referred to as Jet Propellant 7 prior to MIL-DTL-38219) is a specialized type of jet fuel developed at Pratt and Whitney by master chemist Clarence Brown CB Eichman in 1955 for the Central Intelligence Agency (CIA) for use in its reconnaissance aircraft, the Lockheed A-12, and subsequently for aircraft with similar high speed performance, the Lockheed YF-12 and Lockheed SR-71. It was also used for the higher speed Boeing X-51 Waverider.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).