The Lunar Module Ascent Engine was used to lift up the ascent stage of the Lunar Module (LM) from the surface of the Moon and then dock with the Command Module (CM) orbiting the Moon. If necessary, the engine could also be used to slow down the LM's descent. Developed by Bell Aerosystems, the engine generated 3,500 pounds of thrust and used hypergolic (self-igniting) propellant, which eliminated the need for an ignition system and made the engine simpler, reliable, and lighter weight.
During its development by Bell Aerosystems, the engine faced combustion instability problems and involved several major injector redesigns. Rocketdyne designed replacement injectors which were incorporated and the engine became fully qualified. The Ascent Engine was subsequently used in all successful Apollo lunar landings.
The Rocketdyne Division of Rockwell International gave this LM Ascent Engine to the Smithsonian in 1972.
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
Bell Aerosystems Company
Dimensions
Overall: 49 in. long x 32 1/2 in. diameter (124.46 x 82.55cm)
Materials
Fiber-wound nozzle
Inventory Number
A19721346000
Credit Line
Transferred from the Rocketdyne Division of Rockwell International
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
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