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This is the liquid propellant Lunar Module Ascent Engine. It was one of the most important in the manned Project Apollo missions since it was used to lift up the ascent stage of the Lunar Excursion Module (LEM) from the surface of the Moon which was then to dock with the Command Module (CM) orbiting the Moon. In the event of a too fast approach to the Moon, the engine could also be used to slow down the descent. It produced 3,500 pounds of thrust. The engine was developed and built by Rocketdyne.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type PROPULSION-Rocket Engines Manufacturer Rocketdyne Division, Rockwell International
 Dimensions Overall: 53 in. long x 32 in. outside diameter (127 cm. long x 81.28 cm.outside diameter.
 Materials Overall metal, mainly stainless steel; combustion chamber covering probably a phenolic; aluminum pipes; electrical wire, wrapped with foil
 Inventory Number A19751345000 Credit Line Gift of Rocketdyne Division, Rockwell International Corporation Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.