Encyclopedia Astronautica

Rocketdyne Lox/Kerosene rocket engine family. Introduced in 1974 on the McDonnell Douglas' Delta 2000 series launcher; replaced the MB-3 as the main system for that launcher. Completed Delta service on the 6000 model in 1992, but continued in use as part of the Atlas MA- 5A powerplant until the retirement of the Atlas.

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