J-2X photograph

J-2X

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Thrust-to-weight ratio55. 04
Nozzle ratio92:1
Thrust (vac.)1,307 kN (294,000 lbf)
Mixture ratio5. 5-4. 5
CycleGas generator
Dry weight5,450 pounds (2,470 kg)
Date of Reg.
Date of Upd.
ID2477648
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About J-2X


The J-2X is a liquid-fueled cryogenic rocket engine that was planned for use on the Ares rockets of NASA's Constellation program, and later the Space Launch System.

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