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This is the propulsion system of the type used by two identical Viking Orbiter spacecraft launched in 1975 which each entered orbits of the planet Mars in 1976. The system had three important functions. These were to: make course corrections during the trip to Mars, slow the spacecraft for Mars orbit insertion, and make Orbiter steering maneuvers during Mars orbit. The system consisted of a single 300 pound thrust, multistart rocket engine, mounted on a moveable gimbal. It used two side-by-side propellant tanks containing the fuel and oxidizer and a smaller, spherical tank for the helium used to force in the propellants into the combustion chamber. The propulsion system was transferred to the Smithsonian in 1996 from the NASA Jet Propulsion Laboratory.

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 NASA - Jet Propulsion Laboratory Dimensions Height, 9 feet 2 inches; diameter, 6 feet 9.5 inches;
Weight 450 LBS.
Materials Main support ring, aluminum; tanks (3), stainless steel
Inventory Number A19960003000 Credit Line Transferred from NASA, Jet Propulsion Lab Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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