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E-2C Hawkeye (aka "The Hummer")



Northrop Grumman (Prime), Westinghouse


Early warning and control aircraft

Power Plant:

E-2C: Two Allison T56-A-425 turboprops; each has approximately 4,600 horsepower

E-2C+: Two Allison T56-A-427 engines; each has approximately 5,100 horsepower; since 1988


Crew of five—two pilots and three operators.


E-2C: maximum speed 350 knots; range 1,300 nautical miles

E-2C+: maximum speed 350 knots; range 1,500 nautical miles


Not applicable


E-2C: Lockheed Martin Ocean, Radar, and Surveillance Systems [ex General Electric Corporation] AN/APS-138 radar since 1984;
AN/APS-139 since 1988

E-2C+: Lockheed Martin Ocean, Radar, and Surveillance Systems [ex General Electric Corporation] AN/APS-145 radar since 1991

All: AN/ALR-73 Passive Detection System, IFF

Mission and Capabilities:

  • High-wing, all-weather, carrier-based airborne early warning and control (AEW&C) aircraft that patrols task force defense perimeters
  • Provides early warning of approaching enemy aircraft and vectors interceptors into attack position
  • In addition to its primary AEW function, can also provide strike and traffic control, area surveillance, search and rescue guidance, navigational assistance, communications relay, and drug interdiction.
  • Group II upgrade to E-2C+ is the biggest advance in AEW technology in two decades.
  • AN/APS-145 radar provides fully automatic overland detection and tracking and significantly extends the radar detection limits. The radar capable of detecting targets anywhere within a three-million-cubic-mile surveillance envelope while simultaneously monitoring maritime traffic.
  • An Enhanced High-Speed Processor, which expands the active track file by 400% over previous versions, is incorporated into the mission computer. Each E-2C can maintain all-weather patrols, track, automatically and simultaneously, more than 600 targets, and control more than 40 airborne intercepts.
  • Enhanced Main Display Units provide operators with improved visual representation.
  • Joint Tactical Information Distribution System (JTIDS) incorporates several anti-jam features to allow uninterrupted voice and data communications, thereby enhancing interoperability.

Program Summary:

  • In service with Naval Air Forces Atlantic and Naval Air Forces Pacific, as well as the armed forces of Israel, Japan, Egypt, Singapore, and Taiwan
  • Was delivered to France in 1997
  • Discussions with several other potential customers are ongoing.
  • The Hawkeye entered service in 1961 as the E-2A and was updated in 1969 to the E-2B.
  • E-2C was introduced in 1973.
  • In 1978, the AN/APS-125 Advanced Radar Processing System was introduced and was succeeded in 1984 by the AN/APS-138 (now referred to as Group 0).
  • Retirement has begun.
  • In 1988, Group I version was introduced; this featured an upgraded T56-A-427 engine, which eliminated operating restrictions imposed by growth in the aircraft’s gross weight due to incorporation of new systems.
  • Radar was updated to the AN/APS-139 with a High-Speed Processor that doubled the track files maintained by the system.
  • Eighteen Group I aircraft were built and are being upgraded to Group II configuration.
  • The AN/APS-145 radar alleviates saturation, track overload, and overland tracking clutter.
  • Group II increases radar and IFF range, radar volume, target track capability, number of targets displayed, and target recognition capability through the use of color displays.
  • Group I and Group II aircraft are also referred to as E-2C+.


External Dimensions

Wing span 24.56 m / 80' 7"
Wing chord: (at root) 3.96 m
Wing chord (at tip) 1.32 m
Wing aspect ratio 8.94 m
Length overall 17.54 m / 57' 9"
Height overall 5.58 m / 18' 4"
Diameter of rotodome 7.32 m
Tailplane span 7.99 m
Wheel track 5.93 m
Wheel base 7.06 m
Propeller diameter 4.11 m


Wings, gross 65.03 m2 / 700 sq. ft.
Ailerons (totals) 5.76 m2
Trailing-edge flaps (total) 11.03 m2
Fins, include rudders and tabs:  
Outboard (total)
10.25 m2
Inboard (total)
4.76 m2
Tailplane 11.62 m2
Elevators (total) 3.72 m2

Weights and Loadings

Weight empty 17,859 kg / 40,484 lbs.
Maximum fuel (internal, usable) 5,624 kg / 12,400 lbs.
Maximum T-O weight 5,624 kg / 54,426 lbs.
Maximum power loading 3.18 kg/kW

Performance (at maximum Takeoff Weight)

Maximum level speed 338 knots
Cruising speed (ferry) 259-260 knots
Approach speed 103 knots
Stalling speed (landing configuration) 75 knots
Service ceiling 11,275 m / 37,000'
Minimum T-O run 564 m / 1,850'
T-O to 15 m 793 m
Minimum landing run 439 m
Combat Radius 1,500 Km
Ferry range 1,540-1,542 nm
Time on station, 175 nautical miles from base 4 hr. 24 min
Endurance with maximum fuel 6 hr. 15 min

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Page last modified: 07-07-2011 02:29:30 ZULU