Encyclopedia Astronautica
Saturn IV



j2.jpg
J-2
Credit: © Mark Wade
Lox/LH2 propellant rocket stage. Loaded/empty mass 50,576/5,217 kg. Thrust 400.35 kN. Vacuum specific impulse 410 seconds. Configuration as flown.

Cost $ : 43.500 million. No Engines: 6.

Status: Study 1960.
Gross mass: 50,576 kg (111,500 lb).
Unfuelled mass: 5,217 kg (11,501 lb).
Height: 12.19 m (39.99 ft).
Diameter: 5.49 m (18.01 ft).
Span: 5.49 m (18.01 ft).
Thrust: 400.35 kN (90,001 lbf).
Specific impulse: 410 s.
Burn time: 482 s.
Number: 13 .

More... - Chronology...


Associated Countries
Associated Engines
  • RL-10 Pratt and Whitney lox/lh2 rocket engine. 66.7 kN. Isp=410s. Early version as proposed for Nova A, Nova B, Saturn B-1, Saturn C-2, Saturn C-3, Saturn I. First flight 1961. More...

Associated Launch Vehicles
  • Saturn C-2 American orbital launch vehicle. The launch vehicle initially considered for realizing the Apollo lunar landing at the earliest possible date. 15 launches and rendezvous required to assemble direct landing spacecraft in earth orbit. More...
  • Saturn B-1 American orbital launch vehicle. Most powerful version of Saturn I considered. New low energy second stage with four H-1 engines, S-IV third stage, Centaur fourth stage. Masses, payload estimated. More...
  • Saturn C-3 The launch vehicle concept considered for a time as the leading contender for the Earth Orbit Rendezvous approach to an American lunar landing. More...
  • Saturn I American orbital launch vehicle. Von Braun launch vehicle known as 'Cluster's Last Stand' - 8 Redstone tanks around a Jupiter tank core,powered by eight Jupiter engines. Originally intended as the launch vehicle for Apollo manned circumlunar flights. However it was developed so early, no payloads were available for it. More...
  • Saturn C-1 American orbital launch vehicle. Original flight version with dummy upper stages, including dummy Saturn S-V/Centaur (never flown). More...
  • Saturn I Blk2 American orbital launch vehicle. Second Block of Saturn I, with substantially redesigned first stage and large fins to accomodate Dynasoar payload. 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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