Rocket Engine, Liquid Fuel, Apollo Lunar Module Ascent Engine


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This is the Lunar Module Ascent Engine used to lift up the ascent portion of the Lunar Excursion Module (LEM) after the completion of a lunar landing mission for Project Apollo. The ascent portion of the LEM, carrying the Apollo two astronauts, then docked with the Command Module (CM) orbiting the Moon and flown by the CM Commander.

The Ascent Engine engine produced 3,500 pounds of thrust and was built by the Bell Aerosystems Company. The engine was used successfully in all operational Apollo lunar missions between 1969 and 1972, except for Apollo 13 which did not reach the Moon. This engine was donated to the Smithsonian in 1972 by the Grumman Aerospace Co.

Collection Item Long Description:

Inventory Number


Credit Line

Gift of Grumman Aerospace Corporation

Country of Origin

United States of America


Overall metal; combustion chamber covering probably a phenolic


Overall: 4 ft. 5 in. tall x 2 ft. 6 3/4 in. wide x 2 ft. 8 1/4 in. diameter (134.62 x 78.11 x 81.92cm)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


PROPULSION-Rocket Engines