| Saturn MS-IVB-2 | ||
Upper stage / space tug - Douglas study, 1965. Launched by Saturn V. S-IVB with 315 k high pressure 3000 psia engine, 350,000 pounds propellant Designation for high-performance high-pressure chamber Lox/LH2 engine developed from J-2. Considered for upgrades to Saturn V launch vehicle upper stages. Technology led to Space Shuttle Main Engines. Length: 23.12 m (75.85 ft). Basic Diameter: 6.61 m (21.68 ft). Span: 6.61 m (21.68 ft). Mass: 176,600 kg (389,300 lb). Main Engine: HG-3. Main Engine Thrust: 1,401.300 kN (315,025 lbf). Main Engine Propellants: Lox/LH2. Main Engine Propellants: 158,800 kg (350,000 lb). Main Engine Isp: 447 sec.
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