Specifications
Year: 1975
Status: Active, In-Service
Manufacturer(s): Boeing - USA
Production: 4
Capabilities:
Status: Active, In-Service
Manufacturer(s): Boeing - USA
Production: 4
Capabilities:
Crew: 4
Length: 231.30 ft (70.5 m)
Width: 195.87 ft (59.7 m)
Height: 63.32 ft (19.3 m)
Weight (Empty): 418,878 lb (190,000 kg)
Weight (MTOW): 826,403 lb (374,850 kg)
Length: 231.30 ft (70.5 m)
Width: 195.87 ft (59.7 m)
Height: 63.32 ft (19.3 m)
Weight (Empty): 418,878 lb (190,000 kg)
Weight (MTOW): 826,403 lb (374,850 kg)
Power: 4 x General Electric CF6-50E2 turbofan engines developing 52,500 lb of thrust each.
Speed: 603 mph (970 kph; 524 kts)
Ceiling: 45,932 feet (14,000 m; 8.7 miles)
Range: 7,140 miles (11,490 km; 6,204 nm)
Ceiling: 45,932 feet (14,000 m; 8.7 miles)
Range: 7,140 miles (11,490 km; 6,204 nm)
Operators: United States
The fleet were born through a 1973 initiative which originally involved two airframes and these came to be known under the designation of "E-4A" (powered by 4 x Pratt & Whitney JT9D series engines). By the end of 1975, a third aircraft was added to the group and this entry was powered by 4 x General Electric GE F103 (CF6) engines. The E-4B variant was a "one-off" conversion aircraft with additional equipment (including a noticeable dorsal spine bulge) and this arrived in the fleet during December of 1979. In 1985, the original three aircraft were revised to the B-model standard and the CF6 engine powered them all. A modernization of the entire fleet was had in 2005 during the post-9/11 period.
Externally the aircraft closely resembles the Boeing 747 product complete with its two-story frontal section, four-engined layout, and single tail fin. A series of antenna protrude from the spine of the fuselage showcasing the many systems and sensors the aircraft carries. Internally, the aircraft is arranged as a series of compartments which are used to accomplish various tasks in the event of a national emergency. While the standard operating crew is four (including two pilots), the fuselage can situate over 100 personnel to cover critical functions during a national emergency. The aircraft is fully-equipped with advanced systems as well as countermeasures and other protective means (including EMP resistance and nuclear shielding). An in-flight refueling capability extends the range of the E-4 command post considerably over the previous EC-135J platforms they replaced.
At least one E-4 is held "on-call" at any given time and regularly deploys with the President of the United States when overseas trips are on the schedule. When the President is aboard an E-4, the aircraft uses the callsign of "Air Force One".
The Northrop Grumman E-10 MC2A, built upon the framework of the Boeing 767-400ER - was intended as the direct successor to the E-4 but the project was cancelled in 2007.
At least one E-4 is held "on-call" at any given time and regularly deploys with the President of the United States when overseas trips are on the schedule. When the President is aboard an E-4, the aircraft uses the callsign of "Air Force One".
The Northrop Grumman E-10 MC2A, built upon the framework of the Boeing 767-400ER - was intended as the direct successor to the E-4 but the project was cancelled in 2007.
Armament
None.
Cockpit Picture
Variants / Models
• E-4A - Initial Production Models; three examples produced; later brought to E-4B standard.
• E-4B - Fitted with CF6-50E2 engines of 52,500lb thrust each; EMP protection; special shielding from thermal and nuclear sources; additional specialized equipment.
