This is a Marc 50 rocket motor developed and manufactured by the Atlantic Research Corporation (ARC). The U.S. Air Force used these motors to eject the nosecone shroud on the Minuteman III intercontininental ballistic missile (ICBM) just before deployment of the Mark 12 reentry vehicle that would carry the nuclear payload.
The motor used Arcadene 156A propellant manufactured by ARC; it produced a thrust of 1,100 pounds. Development of the motor got underway in August 1966 and ended in a little more than one year, in September 1967. The Minuteman III became operational in 1970.
Transferred to NASM from the Atlantic Research Corporation.
Display Status
This object is on display in Rockets & Missiles at the Steven F. Udvar-Hazy Center in Chantilly, VA.
Object Details
Date
1966-1970
Country of Origin
United States of America
Type
PROPULSION-Rocket Engines
Manufacturer
Atlantic Research Corp.
Dimensions
Length, 19 inches; width, 17 inches; diameter, 6 inches; weight, 12 lbs.
Materials
Overall, steel, probably AISI 4130 steel, with an ATJ graphite nozzle insert; exterior seruces are cadmium plated
Inventory Number
A20060534000
Credit Line
Gift of Atlantic Research Group
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
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