E-2 Hawkeye Airborne Command and Control Aircraft


General Characteristics
Primary Function: Airborne Command and Control, Battle Space Management
Contractor:Northrop Grumman Aerospace Corp
Date Deployed: January 1964
Unit Cost: $80 million
Propulsion: Two Allison T-56-A427 turboprop engines; (5,100 shaft horsepower each)
Length: 57 feet 6 inches (17.5 meters)
Height: 18 feet 3 inches (5.6 meters)
Wingspan: 80 feet 7 inches (28 meters)
Weight: Max. gross, take-off: 53,000 lbs (23,850 kg) 40,200 lbs basic (18,090 kg)
Airspeed: 300+ knots (345 miles, 552 km. per hour)
Ceiling: 30,000 feet (9,100 meters)
Crew: Five
Last updated: 17 Sep 2021
Description
The E-2 Hawkeye is the Navy's all-weather, carrier-based tactical battle management airborne early warning, command and control aircraft. The E-2 is a twin engine, five crewmember, high-wing turboprop aircraft with a 24-foot diameter radar rotodome attached to the upper fuselage.
Features
The Hawkeye provides all-weather airborne early warning, airborne battle management and command and control functions for the Carrier Strike Group and Joint Force Commander. Additional missions include surface surveillance coordination, air interdiction, offensive and defensive counter air control, close air support coordination, time critical strike coordination, search and rescue airborne coordination and communications relay. An integral component of the Carrier Strike Group air wing, the E-2 uses computerized radar, Identification Friend or Foe and electronic surveillance sensors to provide early warning, threat analysis against potentially hostile air and surface targets.
Beyond the battle group, the Hawkeye's command and control capability makes it a multi-mission platform through its ability to coordinate concurrent missions that may arise during a single flight, to include: airborne strike, land force support, rescue operations, managing a reliable communications network between widely dispersed nodes and support for drug interdiction operations.
Background
The continuous improvements in early airborne radars by 1956 led to the concept of an airborne early warning and command and control aircraft. The first aircraft to perform this mission was the Grumman E-1 Tracer (a variant of the S-2 Tracker anti-submarine aircraft), which saw service from 1954 to 1964. The E-1's successor, the E-2 Hawkeye, was the first carrier-based aircraft designed from the outset for the all-weather airborne early warning and command and control mission. Since replacing the E-1 in 1964, the Hawkeye has been the "eyes of the fleet." Since its combat debut during the Vietnam conflict, the E-2 has served the Navy around the world.
Hawkeyes directed F-14 Tomcat fighters flying combat air patrol during the two-carrier battle group joint strike against terrorist-related Libyan targets in 1986. In the early 1990s, E-2s provided airborne command and control for successful Coalition Air Operations during the first Arabian Gulf War. Directing both land attack and combat air patrol missions over Iraq, the E-2 Hawkeye provided air control for the shoot-down of two Iraqi MIG-21 aircraft by carrier-based F/A-18s in the early days of the war. Later during the 1990s, E-2s supported Operations Northern and Southern Watch over Iraq. E-2s also supported NATO operations over the former Republic of Yugoslavia, including Operation Deny Flight. Recently in Operations Enduring Freedom and Iraqi Freedom, E-2 Hawkeyes provided critical Airborne Battle Management and Command and Control functions supporting numerous Close Air Support and Battlefield Interdiction missions. E-2s also have worked extremely effectively with U.S. law enforcement agencies in drug interdictions operating from bases both the United States and several foreign countries.
The E-2C became operational in 1973 and surpassed one million flight hours in August 2004. The aircraft has undergone several upgrades to its active and passive sensors, engines and propellers. The newest variant of the E-2C (Hawkeye 2000) with its new mission computer, improved radar displays and Cooperative Engagement Capability (CEC), combined with the shipboard Aegis weapon system, forms the cornerstone of sea based Theater Air Missile Defense (TAMD).
Variants of the E-2C Hawkeye are also flown by the Egyptian Air Force, Japanese Self Defense Air Force, Taiwan Air Force and the French Navy.
Advanced Hawkeye (AHE)
The E-2D Advanced Hawkeye (AHE) is the newest variant of the E-2 aircraft platform, replacing the E-2C Hawkeye.
It features a state-of-the-art radar with a two-generation leap in capability and upgraded aircraft systems that will improve supportability and increase readiness. Key E-2D objectives include improved battle space target detection and situational awareness, especially in the littorals; support of Theater Air Missile Defense (TAMD) operations; and improved operational availability.
The E-2D reached IOC in October 2014, and the Navy continues to invest in future capabilities to support command and control requirements for the strike group and the entire force.
Program Status
The first operational fleet squadron completed aerial refueling (AR) training in FY2020. Aerial refueling increases the range and persistence of the E-2D AHE. With AR capabilities, the E-2D can remain aloft and on station for an extended period of time, allowing for extended range from the carrier, dual E-2D coverage, increased persistence and operational flexibility. AR-equipped aircraft will also feature new high endurance seats, fuel system enhancements, and new exterior lighting.
Source:
E-2 Hawkeye Airborne Command and Control Aircraft

Once considered for replacement by the “Common Support Aircraft”, this concept was abandoned. The latest E-2 version is the
E-2D Advanced Hawkeye, which features an entirely new avionics suite including the new AN/APY-9 radar, radio suite, mission computer, integrated satellite communications, flight management system, improved T56-A-427A engines, a glass cockpit and aerial refueling.
The APY-9 radar features an active electronically scanned array (AESA), which adds electronic scanning to the mechanical rotation of the radar in its radome. The E-2D includes provisions for the copilot to act as a “Tactical 4th Operator” (T4O), who can reconfigure his main cockpit display to show radar, IFF, Link 16 (JTIDS)/CEC and access all acquired data. The E-2D’s first flight occurred on 3 August 2007.
On 8 May 2009, an E-2D used its Cooperative Engagement Capability system to engage an overland cruise missile with a Standard Missile SM-6 fired from another platform in an integrated fire-control system test.
These two systems will form the basis of the Naval Integrated Fire Control – Counter Air (NIFC-CA) when fielded in 2015; the USN is investigating adding other systems to the NIFC-CA network in the future.
The APY-9 radar has been suspected of being capable of detecting fighter-sized stealth aircraft, which are typically optimized against high frequencies like Ka, Ku, X, C, and parts of the S-bands.
Small aircraft lack the size or weight allowances for all-spectrum low-observable features, leaving a vulnerability to detection by the UHF-band APY-9 radar, potentially detecting fifth-generation fighters like the Russian Sukhoi Su-57 and the Chinese Chengdu J-20 and Shenyang J-31.
Historically, UHF radars had resolution and detection issues that made them ineffective for accurate targeting and fire control; Northrop Grumman and Lockheed claim that the APY-9 has solved these shortcomings by using advanced electronic scanning and high digital computing power via space/time adaptive processing.
According to the Navy’s NIFC-CA concept, the E-2D could guide fleet weapons, such as AIM-120 AMRAAM and SM-6 missiles, onto targets beyond a launch platform’s detection range or capabilities.
Deliveries of initial production E-2Ds began in 2010. On 4 February 2010, Delta One conducted the first E-2D carrier landing aboard USS
Harry S. Truman as a part of carrier suitability testing.
On 27 September 2011, an E-2D was successfully launched by the prototype Electromagnetic Aircraft Launch System (EMALS) at Naval Air Engineering Station Lakehurst. On 12 February 2013, the Office of the Secretary of Defense approved the E-2D to enter full-rate production.
The Navy plans for an initial operational capability by 2015. In June 2013, the 10th E-2D was delivered to the Navy, with an additional 10 aircraft in various stages of manufacturing and predelivery flight testing.
On 18 July 2013, Northrop Grumman was awarded a $113.7 million contract for five full-rate production Lot 2 E-2D Advanced Hawkeye aircraft.
On 13 August 2013, Northrop Grumman was awarded a $617 million contract for five E-2Ds until full-rate production Lot 1. On 30 June 2014, Northrop Grumman was awarded a $3.6 billion contract to supply 25 more E-2D, for a total contracted number of 50 aircraft; 13 E-2D models had been delivered by that time.
In December 2016, an E-2D flew for the first time fitted with an aerial refueling capability. This feature will allow the aircraft to double its time on station to five hours and increase total mission time from four to seven hours. The refueling modification will start being built into the 46th plane (out of 75 planned) for delivery in late 2020 costing an additional $2 million per aircraft and the Navy plans to retrofit the feature on all previous Hawkeyes for $6 million per plane.
Shephard Defence Insight notes that the AN/APY-9 UHF radar has a detection range of about 550km with continuous 360° coverage.