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 cryogenic liquid hydrogen (LH 2) and liquid oxygen (LOX) propellants, with each engine producing 1,033.1 kN (232,250 lb f) of thrust in vacuum.

J-2发动机是一款液态燃料低温 火箭发动机，曾被用于 NASA 的 土星1B号运载火箭 和 土星5号运载火箭。 J-2发动机由 Rocketdyne在美国制造，以低温 液氢 (LH2) 和 液氧 (LOX) 为推进剂，每台发动机在真空中能产生1,033.1 kN（232,250 lbf） 推力。 发动机最初的设计可以追溯到1959年Silverstein委员会的建议。 Rocketdyne在1960年6月获得了研发J-2发动机的许可，初次飞行（AS-201）在1966年2月26日进行。 J-2发动机在它的历史中进行了数次较小的改进，以提高发动 …

The J-2X is a liquid-fueled cryogenic rocket engine that was planned for use on the Ares rockets of NASA's Constellation program, and later the Space Launch System.

2009年11月1日 · The J-2 engine was unique in many respects. Technology was not nearly as well-developed in oxygen/hydrogen engines at the start of the J-2 project. As a result, it experienced a number of "teething" problems. It was used in two stages on the Saturn V vehicle in the Apollo Program, as well as on the later Skylab and Apollo/Soyuz programs.

j-2液体火箭发动机是美国“土星1b”运载火箭第二级发动机，也是“土星5号”运载火箭第二级和第三级的发动机。 在“ 土星1B ”第二级和“ 土星5号 ”第三级上各装1台J-2发动机，可双向摆动±7.5°。

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.

The J-2S (J-2 Simplified) engine was originally developed as a replacement for the J-2 Saturn vehicle upper stages, stages 2 and 3 on the Saturn V, and Stage 2 on the Saturn IB. The intent of the design changes was not only to provide performance upgrades to the engine but to greatly simplify the production and operation of the engine.

2019年10月5日 · A single J-2 engine boosted the spacecraft into low-Earth orbit. After performance checks, the J-2 was reignited for translunar injection, a 6.5-minute burn which accelerated the vehicle on a course for the Moon. J-2 engines were used on the Saturn IB and Saturn V rockets for launches from the late 1960s through the mid-1970s.

2024年8月26日 · The Rocketdyne J-2 was a liquid-fuel cryogenic rocket engine that played a crucial role in NASA’s Apollo program, serving as the powerplant for the Saturn IB and Saturn V launch vehicles. Developed in the early 1960s, the J-2 was a technological marvel that enabled humans to reach the Moon.

J-2发动机 是一款液态燃料低温 火箭发动机，曾被用于 NASA 的 土星1B号运载火箭 和 土星5号运载火箭。 J-2发动机由 Rocketdyne 在美国制造，以低温 液氢 (LH2) 和 液氧 (LOX) 为推进剂，每台发动机在真空中能产生1,033.1 kN（232,250 lb f） 推力。 发动机最初的设计可以追溯到1959年 Silverstein委员会 （英语：Silverstein Committee） 的建议。 Rocketdyne在1960年6月获得了研发J-2发动机的许可，初次飞行（AS-201 （英语：AS-201））在1966年2月26日进行。 J-2发动 …