Lox/LH2 propellant rocket stage. Loaded/empty mass 227,000/23,000 kg. Thrust 892.00 kN. Vacuum specific impulse 425 seconds. Mass estimated based on total LV weight.
Status: Study 1960.
More... - Chronology...
Gross mass: 227,000 kg (500,000 lb).
Unfuelled mass: 23,000 kg (50,000 lb).
Height: 30.50 m (100.00 ft).
Diameter: 6.70 m (21.90 ft).
Span: 6.70 m (21.90 ft).
Thrust: 892.00 kN (200,529 lbf).
Specific impulse: 425 s.
Specific impulse sea level: 306 s.
Burn time: 941 s.
Number: 1 .
J-2 Rocketdyne lox/lh2 rocket engine. 1033.1 kN. Study 1961. Isp=421s. Used in Saturn IVB stage in Saturn IB and Saturn V, and Saturn II stage in Saturn V. Gas generator, pump-fed. First flight 1966. More...
Associated Launch Vehicles
Nova 4S American heavy-lift orbital launch vehicle. NASA Nova design using a cluster of 4 x 240 inch solid motors used as first stage; upper stages as Nova 7S and 8L. More...
Nova 7S American heavy-lift orbital launch vehicle. NASA Nova design using a cluster of 7 x 160 inch solid motors used as first stage; upper stages as Nova 4S and 8L. More...
Nova 8L American heavy-lift orbital launch vehicle. Most capable NASA Nova design, studied in June 1960 just prior to selection of Saturn for moon landing. Used a three stage configuration of eight F-1 engines in stage 1, two M-1 engines in stage 2, and one J-2 engine in stage 3. Similar to the Saturn C-8 except in the use of M-1 engines. Unlike other modular Nova designs of the time, this one had the unitary stage construction of Saturn. More...
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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