Encyclopedia Astronautica
Saturn MS-IVB-2



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Advanced Engines
Advanced Engines planned for uprated Saturn and Nova boosters
Credit: © Mark Wade
Lox/LH2 propellant rocket stage. Loaded/empty mass 176,600/17,800 kg. Thrust 1,401.30 kN. Vacuum specific impulse 447 seconds. Douglas Studies, 1965: S-IVB with 315 k high pressure 3000 psia engine, 350,000 pounds propellant

Status: Study 1965.
Gross mass: 176,600 kg (389,300 lb).
Unfuelled mass: 17,800 kg (39,200 lb).
Height: 23.12 m (75.85 ft).
Diameter: 6.61 m (21.68 ft).
Span: 6.61 m (21.68 ft).
Thrust: 1,401.30 kN (315,025 lbf).
Specific impulse: 447 s.
Specific impulse sea level: 200 s.
Burn time: 489 s.

More... - Chronology...


Associated Countries
Associated Engines
  • HG-3 Rocketdyne lox/lh2 rocket engine. 1400.7 kN. Study 1967. Isp=451s. High-performance high-pressure chamber engine developed from J-2. Considered for upgrades to Saturn V launch vehicle upper stages. Technology led to Space Shuttle Main Engines. More...

Associated Launch Vehicles
  • Saturn MLV-V-2 American orbital launch vehicle. MSFC study, 1965. Saturn IC stretched 240 inches with 5.6 million pounds propellant and 5 F-1A engines; S-II stretched 41 inches with 1.0 million pounds propellant and 5 J-2 engines; S-IVB stretched 198 inches with 350,000 lbs propellant, 1 HG-3 engine. More...
  • Saturn MLV-V-3 American orbital launch vehicle. MSFC study, 1965. Ultimate core for improved Saturn V configurations studied under contract NAS8-11359. Saturn IC stretched 240 inches with 5.6 million pounds propellant and 5 F-1A engines; S-II stretched 156 inches with 1.2 million pounds propellant and 5 HG-3 engines; S-IVB stretched 198 inches with 350,000 lbs propellant, 1 HG-3 engine. More...
  • Saturn IB-B American orbital launch vehicle. Douglas Studies, 1965: S-IB with 225 k lbf H-1's; S-IVB stretched with 350,000 lbs propellants and HG-3 high performance engine. 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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