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

This is a quad, or cluster, of four Apollo Reaction Control System (RCS) engines. The RCS was a vital rocket engine system for maintaining the attitude of the Apollo Service Module (SM), helped it to maneuver in space, plus undertake minor midcourse velocity corrections, abort separations and emergency attitude maneuvers. Each thruster produced 100 pounds of thrust. The propellants were monomethyl hydrazine (MMH) and nitrogen tetroxide. The quad shown here was not flown but was from Apollo-Soyuz Test Project, possibly as a backup RCS. It was transferred to the Smithsonian in 1980 from the NASA Johnson Space Flight Center.

 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 SPACECRAFT-Crewed-Parts & Structural Components Manufacturer The Marquardt Corporation
 Dimensions Overall (each half x 8): 6 1/2in. x 3 3/8in. x 9 5/8in. (16.51 x 8.57 x 24.45cm)
Storage: 8 1/4in. x 8 1/4in. x 1ft 10in. (20.96 x 20.96 x 55.88cm)
 Materials Plastic
Aluminum
Paper
Adhesive
Ink
 Inventory Number A19800081002 Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.