Encyclopedia Astronautica
J57-19


Pratt and Whitney turbojet engine. 53.8 kN. Out of production. Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust. Isp=5142s. Used on B-52 launch aircraft for X-15A. First flight 1959.

Thrust (sl): 48.900 kN (10,993 lbf). Thrust (sl): 4,989 kgf.

Status: Out of production.
Thrust: 53.80 kN (12,095 lbf).
Specific impulse: 5,142 s.
Burn time: 48,000 s.
Number: 2712 .

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Associated Countries
See also
Associated Launch Vehicles
  • X-15A American air-launched rocketplane. Manned hypersonic research rocket aircraft. More...
  • X-15A-2 American air-launched rocketplane. Manned hypersonic research rocket aircraft. Stretched rebuild of crashed X-15A, with drop tanks. Reached Mach 6.7 and 108 km altitude. More...

Associated Manufacturers and Agencies
Associated Propellants
  • Air/Kerosene Ambient air (78 % nitrogen, 21% oxygen, etc.) is scooped up by air intakes and used in turbojet, turbofan, ramjet, scramjet, or other airbreathing engines. It is used to burn aviation-grade kerosene, commercial grade JP-4 or JP-5, their military equivalents, or special high-temperature blends such as those used in the SR-71. More...

Associated Stages
  • NB-52 Subsonic rocket launch aircraft. Loaded/empty mass 177,273/70,545 kg. Thrust 430.47 kN. Specific impulse 5142 seconds. Boeing Bomber-swept wing. Maximum release conditions: Wing mounted, 25,000 kg (19.1 m length x 6.7 m span) at 880 kph at 11,448 m altitude More...

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