Encyclopedia Astronautica
J57-8


Pratt and Whitney turbojet engine. 45.4 kN. Out of production. Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust. Isp=1414s. Used on Caleb launch vehicle. First flight 1960.

Thrust (sl): 41.200 kN (9,262 lbf). Thrust (sl): 4,203 kgf.

Status: Out of production.
Thrust: 45.40 kN (10,206 lbf).
Specific impulse: 1,414 s.
Burn time: 3,000 s.
Number: 7 .

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Associated Countries
See also
Associated Launch Vehicles
  • Caleb American air-launched orbital launch vehicle. Heavily classifed project related to air-launched ASAT development. Launch tests in 1958. NOTS project staff believed they successully orbited a satellite but unconfirmed. 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
  • F-6 Turbojet powered rocket launch aircraft. Loaded/empty mass 8,163/6,870 kg. Thrust 45.36 kN. Specific impulse 1414 seconds. Douglas (Heinemann) designed fighter-delta wing. Used as zero stage for Caleb miniature satellite launcher. Maximum release conditions: 3,628 kg at 1,166 kph at 16,768 m altitude More...
  • F-6A Subsonic rocket launch aircraft. Loaded/empty mass 10,474/6,869 kg. Thrust 71.14 kN. Specific impulse 2770 seconds. Navy fighter used to launch Caleb air-launched rocket. Launch conditions 3,000 lbs at 40,000 feet at 480 mph at 56 degree angle. More...

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