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This is a 4AS-1000 Mk. 2 JATO (Jet-Assisted-Take-Off) rocket motor, developed and constructed by the Aerojet Engineering Corporation for helping to lift heavily loaded planes and for rescue work. The motor produced 1,000 pounds of thrust for four seconds. The 4AS-1000 dates to 1953, and was a modification of the 14AS-1000. Due to its short duration, the 4AS-1000 was not as widely used as the standard 14AS-1000.

When the 4AS-1000 appeared, Aerojet was becoming one of the world's leading developers and producers of liquid and solid fuel rocket motors for a wide variety of applications, from boosters, to missile power plants, sounding rocket motors, and launch vehicle engines, plus many miscellaneous applications.

Aerojet General donated this JATO Unit to the Smithsonian in 1968

 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
Date 1953 Country of Origin United States of America Type PROPULSION-Rocket Engines Manufacturer Aerojet Engineering Corp.
 Dimensions Overall: 35 in. long x 10 in. diameter (88.9 x 25.4cm)
Other (exhaust throat): 2 in. diameter (5.08cm)
 Materials Overall, steel
 Inventory Number A19680557000 Credit Line Gift of the Aerojet General Corporation Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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