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 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 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

Shown here is a test-fired attitude control motor of APS (auxiliary propulsion system) for the S-IVB (third) stage of the Saturn V launch vehicle. APS motors like this one provided three axis control of roll, pitch, and yaw during Earth orbit and injection into lunar orbit. Each engine produced 150 pounds of thrust in pulses on request for a cumulative total of 5 minutes. The propellants consisted of hypergolic (self igniting) monomethyl hydrazine and nitrogen tetroxide. Each APS module on the S-IVB stage contained three 150 pound thrust motors.

TRW (Thomson-Ramo-Woolridge) began developing the APS system for NASA in 1963. The system performed to specifications on all Saturn V flights from the unmanned Apollo 4 in 1967 through the last Apollo lunar mission in 1972.

Donated by McDonnell Douglas Astronautics Co.

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 TRW, Inc., Electromechanical Division Dimensions 16 15/16" x 9" x 7"
Materials Phenolic Resin
Steel
Anodized Aluminum
Plastic
Sythetic Rubber
Adhesive
Paper
Paint
Nozzle and chamber, phenolic impregnated silica with fiberglass overwrap; nozzle, sprayed zirconia coating; propellant inlets and valves, metal.
Inventory Number A19740782000 Credit Line Transferred to the National Air and Space Museum from the McDonnell Douglas Astronautics Co. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.