'Doomsday Plane' Would Save President and Joint Chiefs in Apocalypse Scenario

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Some more details on the general characteristics of the plane, according to the official U.S. Air Force website:

Primary Function: Airborne operations center

Contractor: Boeing Aerospace Co.

Power Plant: Four General Electric CF6-50E2 turbofan engines

Thrust: 52,500 pounds each engine

Wingspan: 195 feet, 8 inches (59.7 meters)

Length: 231 feet, 4 inches (70.5 meters)

Height: 63 feet, 5 inches (19.3 meters)

Weight: 410,000 pounds (185,973 kilograms)

Maximum Takeoff Weight: 800,000 pounds (360,000 kilograms)

Fuel Capacity: 410,000 (185,973 kilograms)

Payload: communications gear permanently installed on aircraft

Speed: 602 miles per hour (523 knots)

Range: 6,200 nautical miles

Ceiling: Above 30,000 feet (9,091 meters)

Crew: Up to 112 (flight crew and mission crew)

Unit Cost: $223.2 million (fiscal 98 constant dollars)

Initial operating capability: January 1980

Inventory: Active force, 4

ABC News' James Wang contributed to this article.

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