This is the post-boost propulsion system for the U.S. Air Force's Minuteman III Intercontinental Ballistic Missile (ICBM). Unlike the Minuteman's booster stages, which are powered by solid fuel rocket motors, the post-bost system relies on liquid fuel engines to steer the reentry vehicle carrying the warhead to its target.
The system includes three separate motors: one that produces 315 pounds of thrust for forward motion; a 22-pound thrust motor to control pitch and yaw; and an 18-pound thrust motor for roll control.
The Minuteman III entered service in 1970 with three independently targeted nuclear warheads. The 1993 START treaty reduced the number of warheads from three to one. The current inventory of 450 MInuteman IIIs is due to remain in service until 2030.
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
Bell Aerosystems Company
Dimensions
Approximate: 133.35 x 64.77cm (4ft 4 1/2in. x 2ft 1 1/2in.)
Materials
Magnesium, beryllium, paint, teflon, Aluminum, Cadmium Plating, Fiberglas, Stainless Steel, Rubber (Silicone), cork, paper, Adhesive
Inventory Number
A19770994000
Credit Line
Gift of Bell Aerospace Company
Data Source
National Air and Space Museum
Restrictions & Rights
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