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J2 Engine

  • Width : 6ft 8.5in (2.04m)
  • Length : 11ft 1in (3.38m)
  • Thrust(altitude) : 230,000lb (104.33ton)
  • Rated run duration : 500sec.
  • Manufacturer : North American Rockwell Corp., Rocketdyne Div. Canoga Park, Calif.
Apollo6-J2-engines-noID A closeup of Apollo 6 second stage's J2 engines in the VAB J.L. Pickering
J2-Engines-NoID J2 Engines in assembly area Ralf Kutzer

The J2 engine was fueled by liquid oxygen and liquid hydrogen, 5 group in the second stage(S-II), and one in the third stage(S-IVB) are/is used on Saturn V. On the second stage(S-II), the center engine was fixed, and four other were mounted on the gimbal and performing attitude control of the rocket. The engine on the third stage(S-IVB) was also mounted on the gimbal. The gimbal was configured by compact and sturdy universal joint, and was a socket type bearing made of fiberglass and Teflon.
For directing a Apollo spacecraft to reach the Moon orbit, J2 engine has capability of re-ignited during flight.
In addition, the Space Launch System:the next generation of booster currently under development at NASA, improved J2X engine will be used.

Display at Kennedy Space Center
Display at London Science Museum
Display at U.S. Space and Rocket Center


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