Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

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
For more information, visit the Smithsonians Terms of Use.