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Rocketdyne

Apollo J-2

J-2
Engine statistics
Specification
Applications Saturn second and third stage
Propellants LOX/LH2
Thrust in Vacuum 230,000 lb
Isp in vacuum(s) 425 s
Mixture Ratio 5.5:1
Weight 3480 lb
Chamber Pressure 763 psia
Area Ratio 27.5:1
Engine Cycle
Pump Design Pressures