Rocketdyne J-2
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The J-2, commonly known as Rocketdyne J-2, was a liquid-fuel cryogenic rocket engine used on NASA's Saturn IB and Saturn V launch vehicles. Built in the United States by Rocketdyne, the J-2 burned cry
J-2 test firing
Augmented spark igniter (ASI)
J-2 specifications
The single J-2 engine of an S-IVB
S-IVB
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The S-IVB was the third stage on the Saturn V and second stage on the Saturn IB launch vehicles. Built by the Douglas Aircraft Company, it had one J-2 rocket engine. For lunar missions it was fired tw
Rocketdyne J-2
…and had a mass of approximately 1,788 kilograms (3,942 lb). Five J-2 engines were used on the Saturn V's S-II second stage, and one J-2 was used on the S-IVB upper stage used on both the Saturn IB and Saturn V. Proposals also existed to use various numbers of J-2 engines in the upper stages of an even larger…
S-IVB-206 which was used for the Skylab 2 flight
Cutaway drawing of the Saturn V S-IVB
Apollo 7 S-IVB in orbit over Cape Canaveral
Distant view of Apollo 7 S-IVB stage