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J-2 Rocket Engine: The J-2 engine powered the second and third stages of the mammoth Saturn V moon rocket. Five J-2s were clustered in the second stage and one boosted the third stage. The Rocketdyne Division of North American Aviation Inc., now Boeing, built the J-2 engines. The J-2 engine has 1,014 newtons (230,000 lbs.) of thrust.
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