There are 6 images added between 4 December 2006 and 27 January 2010
Initial Operational Capability (IOC): 1980
Total Production: 4
Unitary Cost: USD$223 million
Also Known As: E-4A
Origin: United States of America
Corporations: Boeing
Parent System: E-4
Initial Operational Capability (IOC): 1974
Total Production: 4
Total Cost: USD$3.0 billion
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Description: The US Air Force E-4 is an airborne operations center for the President and Secretary of Defense derived from Boeing 747-200 airliner. In case of national emergency or destruction of ground control centers, this aircraft provides a highly survivable command, control and communications center to direct US military forces. The E-4 can be refueled in-flight to extend its range and mission endurance.

The E-4 was developed as the replacement for aging EC-135 command post aircraft while providing larger capacity due to its huge airframe. The E-4A was introduced in late 1974 and the B model was delivered to the US Air Force in January 1980. All four existing A models were converted to the B standard by 1985. Currently, it is powered by four 52,500-lb CF6-50E2 engines.

The E-4B has electromagnetic pulse protection, nuclear and thermal effects shielding, an electrical system designed to support advanced electronics, and a wide variety of communications equipment. The communications system links to US strategic and tactical communication satellites constellations. At least one E-4B is always on alert at one of many selected bases throughout the world to support US national authorities in an emergency event.

In December 2005 the US Air Force awarded an industry team led by Boeing a $2 billion contract as Product Support Integrator (PSI) for the E-4 National Airborne Operations Center fleet. The contract was for a five-year period plus one five-year option. The Boeing-led team included L3 Communications, Rockwell Collins, and Greenpoint Technology Inc.

E-4B Specifications

Crew: 114
Number of Engines: 4
Height: 19.3 meter (63 foot)
Length: 71 meter (231 foot)
Wingspan: 60 meter (196 foot)
Ceiling: 9,100 meter (29,856 foot)
Flight Endurance: 12 hour (0.50 day)
Max Takeoff Thrust: 210,000 pound (95,256 kilogram)
Max Takeoff Weight: 360 ton (793,651 pound)
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

E-4B News

There are 5 news between
21 Sep 2007 and 25 Nov 2013
Monday, November 25, 2013Boeing Tests Validate Performance of FAB-T Satellite Communications Program
Thursday, September 5, 2013US Air Force B-2 Bomber Undergoes Communications Upgrade
Tuesday, June 7, 2011Boeing Awarded Contract to Upgrade E-4B Cockpits
Monday, February 2, 2009B-2 Bomber Receives First FAB-T Satellite Communicaton Terminal
Friday, September 21, 2007Boeing Delivers Refurbished E-4B to US Air Force

Operators & Related Equipment

United States of America4
Jul 20154

Grand Total 41
Propulsion Systems
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