J-2X (Engine)

The J-2X is a modern gas-generator cycle, bi-propellant rocket engine, planned for use in the Ares I and Ares V launch vehicles. It consumes liquid hydrogen and liquid oxygen. It has its origin in the J-2 rocket engines used by the Saturn Ib and Saturn V launchers. It is produced by Pratt & Whitney Rocketdyne.

References

• Pratt & Whitney Rocketdyne Awarded $1.2 Billion NASA Contract for J-2X Ares Rocket Engine
• J-2S on astronautix.com
• J-2X fact sheet from NASA (2.9 MB)

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