<P> Turbine Fuel , Low Volatility , JP - 7 , commonly known as JP - 7 , was referred to as Jet Propellant 7 , to MIL - DTL - 38219 is a specific jet fuel that was developed for the United States Air Force ( USAF ) , for use in its supersonic military aircraft that required a jet fuel with a high flash point , and high thermal stability . JP - 7 is the fuel that was developed , which was required by the Pratt & Whitney J58 ( JT11D - 20 ) turbojet engines , which was used primarily in the now retired Lockheed SR - 71 Blackbird . During flight , the SR - 71 could attain speeds in excess of Mach 3 + , which was the most efficient cruising speed for the J58 engines . However , very high skin temperatures are generated at this speed due to friction with the air . A new jet fuel was needed that was not affected by the heat , so JP - 7 jet fuel was developed for this purpose . </P>
<P> Turbine Fuel , Low Volatility , JP - 7 , commonly known as JP - 7 , was referred to as Jet Propellant 7 , to MIL - DTL - 38219 is a specific jet fuel that was developed for the United States Air Force ( USAF ) , for use in its supersonic military aircraft that required a jet fuel with a high flash point , and high thermal stability . JP - 7 is the fuel that was developed , which was required by the Pratt & Whitney J58 ( JT11D - 20 ) turbojet engines , which was used primarily in the now retired Lockheed SR - 71 Blackbird . During flight , the SR - 71 could attain speeds in excess of Mach 3 + , which was the most efficient cruising speed for the J58 engines . However , very high skin temperatures are generated at this speed due to friction with the air . A new jet fuel was needed that was not affected by the heat , so JP - 7 jet fuel was developed for this purpose . </P>
what kind of fuel does the sr-71 use
what kind of fuel does the sr-71 use
Turbine Fuel , Low Volatility , JP - 7 , commonly known as JP - 7 , was referred to as Jet Propellant 7
Turbine Fuel , Low Volatility , JP - 7 , commonly known as JP - 7 , was referred to as Jet Propellant 7