Encyclopedia Astronautica
Cargo LV Stage 2

Lox/LH2 propellant rocket stage. Loaded/empty mass 227,036/19,343 kg. Thrust 2,442.07 kN. Vacuum specific impulse 451 seconds. Trans-lunar injection stage proposed by NASA for Project Constellation exploration of moon and Mars. It would use shuttle external tank tooling. All masses estimated.

No Engines: 2.

Status: Study 2005.
Gross mass: 227,036 kg (500,528 lb).
Unfuelled mass: 19,343 kg (42,644 lb).
Height: 22.74 m (74.60 ft).
Diameter: 8.40 m (27.50 ft).
Span: 8.40 m (27.50 ft).
Thrust: 2,442.07 kN (548,999 lbf).
Specific impulse: 451 s.
Burn time: 370 s.

More... - Chronology...

Associated Countries
Associated Engines
  • J-2S Rocketdyne lox/lh2 rocket engine. 1138.5 kN. Developed 1965-1969. Isp=436s. J-2 version proposed for Saturn follow-on vehicles, using results of the J-2X technology program. The engine was simplified while offering improved performance. More...

Associated Propellants
  • Lox/LH2 Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. Liquid hydrogen was identified by all the leading rocket visionaries as the theoretically ideal rocket fuel. It had big drawbacks, however - it was highly cryogenic, and it had a very low density, making for large tanks. The United States mastered hydrogen technology for the highly classified Lockheed CL-400 Suntan reconnaissance aircraft in the mid-1950's. The technology was transferred to the Centaur rocket stage program, and by the mid-1960's the United States was flying the Centaur and Saturn upper stages using the fuel. It was adopted for the core of the space shuttle, and Centaur stages still fly today. More...

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