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Northrop Grumman E-2D Advanced Hawkeye

Northrop Grumman · Airborne Early Warning (AEW&C) · USA · Digital Age (2010–present)

Northrop Grumman E-2D Advanced Hawkeye — Airborne Early Warning (AEW&C)
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The Northrop Grumman E-2D Advanced Hawkeye is an American twin-engine, turboprop, carrier-capable airborne early warning and control (AEW&C) aircraft developed by Northrop Grumman as the latest evolution of the long-serving E-2C Hawkeye. Entering U.S. Navy service in 2014, the E-2D is the Navy's principal carrier-based AEW&C platform, providing surveillance, command-and-control, and battle management for carrier strike groups. Around 75 airframes have been delivered or placed on order as of 2026, with production at Northrop Grumman's St. Augustine, Florida facility scaled to support both U.S. Navy fleet replacement and growing export demand.

Externally the E-2D retains the classic Hawkeye configuration: twin turboprops, a 24-ft (7.3 m) rotodome above the fuselage, and folding wings for carrier hangar storage. The airframe measures 58 ft (17.5 m) in length with an 81-ft (24.6 m) wingspan, an empty weight of 43,000 lb, and a maximum take-off weight of 57,500 lb. Power comes from two Rolls-Royce T56-A-427A turboprops rated at 5,100 shp each — a step up from the E-2C's T56-A-425. Maximum speed is around 380 mph (Mach 0.5), service ceiling 37,000 ft, and range with maximum fuel 1,500 nmi, supporting mission endurance beyond 6 hours. A typical crew of five comprises pilot, co-pilot, combat information centre officer, air-control officer, and radar operator.

Mission roles centre on detecting, tracking, and classifying air, surface, and missile targets at extended range, then feeding battle-management data to F/A-18E/F Super Hornets, F-35C Lightning IIs, Burke-class destroyers, Ticonderoga-class cruisers, and allied forces. The defining new sensor over the E-2C is the AN/APY-9 active-electronically-scanned-array (AESA) radar, replacing the E-2C's mechanically-scanned AN/APS-145. The AN/APY-9 sharply improves detection of stealth-shaped targets, tracks far more contacts simultaneously, integrates electronic-attack and electronic-protection functions, and handles low-flying and over-land targets that defeated the older set. Other upgrades include a glass cockpit, expanded data links (Link 16, JREAP, and the IFDL Multifunction Data Link), in-flight refuelling added in 2018, and integration with the U.S. Navy CEC (Cooperative Engagement) network for distributed sensing across the strike group.

Since 2014 the E-2D has deployed continuously aboard U.S. Navy carriers in the Indo-Pacific against Chinese and Russian threats, in the Mediterranean against Russian and Iranian threats, and in routine global rotations. The U.S. Navy operates around 50 E-2D across eight Carrier Airborne Early Warning Squadrons — VAW-117 'Wallbangers', VAW-121 'Bluetails', VAW-123 'Screwtops', VAW-124 'Bear Aces', VAW-125 'Tigertails', VAW-126 'Seahawks', and the Reserve VAW-77 'Nightwolves' — based at NAS Norfolk (Virginia), NAS Point Mugu (California), and NAS Whidbey Island (Washington). Foreign operators include the Japan Air Self-Defense Force (13 ordered, deliveries from 2019), France's Aéronavale (3 ordered for the Charles de Gaulle, replacing E-2Cs), Egypt (1 ordered), and Taiwan (6 ordered for 2025–2027 delivery). About 75 E-2D have been delivered or are on order globally.

For Kids — a shorter, friendlier version

The Northrop Grumman E-2D Advanced Hawkeye is the American Navy's flying radar plane. It flies from aircraft carriers, watching the sky for enemy planes, missiles, and ships hundreds of miles away. The E-2D is the newest version of the Hawkeye family, which dates back to 1960.

The E-2D has two Rolls-Royce T56 turboprop engines, each making 5,100 horsepower. Top speed is 396 mph, faster than most race cars. The most obvious part of the plane is the huge round radar disk (called a rotodome) on top, 24 feet wide. It spins around as the plane flies, scanning the sky in every direction.

The wings of the E-2D fold up so the plane fits in the cramped hangars of aircraft carriers. Five crew members work inside: pilot, copilot, and three radar operators sitting at screens. The plane can fly for 6 hours straight while watching everything within 300 miles around it.

The Navy has 52 E-2Ds with more on order, and Japan also flies them. The E-2D first flew in 2007 and entered Navy service in 2014. Each costs about $200 million. The E-2D will keep flying until at least the 2040s, when it may be replaced by a drone or a stealth radar plane.

Fun Facts

  • The radar disk on top is 24 feet wide, about the length of a school bus.
  • The E-2D's wings fold up to fit in tight carrier hangars.
  • Top speed is 396 mph, faster than most race cars.
  • Five crew members fly each mission: 2 pilots and 3 radar operators.
  • The Navy has 52 E-2Ds; Japan also flies them.
  • Each E-2D costs about $200 million, less than a fighter jet.
  • The E-2D can see aircraft 300 miles away, the distance from New York to Washington, D.C.

Kids’ Questions

Why does the disk spin?

The big radar disk on top has antennas on the inside. As the disk spins, the radar beam sweeps across the sky in a full circle. The crew sees a map of everything around the plane, friendly or not. Some newer flying radars don't need to spin (they use electronic beams), but the E-2D still uses the spinning method.

Why fly from a ship?

Navy carrier groups travel far from land, sometimes thousands of miles from any airbase. The E-2D flies with the carrier to give the ships' fighters and missiles a long-range view of the sky. Without an E-2D, the carrier's ships could only see as far as their own ship radars, missing distant enemy planes that could fly close before being spotted.

Why is it slow?

The E-2D's turboprop engines are slower than jet engines but use less fuel. The E-2D's job is to fly slowly in a big circle near the carrier, watching everything. Fuel efficiency matters more than speed because the plane needs to stay airborne for 6 hours per mission. Turboprops are perfect for this kind of flying.

Variants

E-2D Hawkeye (initial 2014 build)
Original 2014 production variant with the AN/APY-9 AESA radar. IOC declared October 2014 with VAW-125 'Tigertails' aboard USS Theodore Roosevelt. Around 30 delivered to the U.S. Navy.
E-2D Block 2 (in-flight-refuelling capable)
Improved variant from 2018 adding a probe-and-drogue in-flight-refuelling fitting for top-up from KC-46, KC-130J, or S-3 Viking buddy-tankers. IFR extends mission endurance from 6 hours to over 12 and enables overland operations from inland bases or forward-deployed carriers. Around 20 delivered.
E-2D Block 3 (proposed)
Proposed future upgrade with AN/APY-9 Block 3 radar improvements, expanded electronic-warfare integration, and stronger data-link and cyber-defence fit. Currently under U.S. Navy budget study; would extend E-2D service life past 2050.
E-2D French variant (proposed Hawkeye 2025)
Proposed French Aéronavale-specific variant for the next-generation French aircraft carrier (CNG-PA, planned for around 2038), incorporating French weapons, sensor, and data-link integrations. Under negotiation between France and Northrop Grumman.
E-2C Hawkeye (predecessor)
Earlier production variant; 138 built between 1973 and 2008 with the AN/APS-145 mechanically-scanned radar. Operated by the U.S. Navy until around 2014, then progressively replaced by the E-2D. Still flown by Egypt, Taiwan, and Mexico. Separate E-2C entry.

Notable Operators

U.S. Navy
Primary operator with around 50 E-2D in service across eight Carrier Airborne Early Warning Squadrons plus a Reserve squadron. Forward-deployed aboard all 11 U.S. Navy aircraft carriers, providing organic AEW&C for each strike group. Combat-deployed for Operation Inherent Resolve (Iraq/Syria, 2014–present), Indo-Pacific Command operations, and continuous global presence.
Japan Air Self-Defense Force
Major export customer; 13 E-2D ordered, deliveries beginning 2019. Operating with 4th Wing at Hamamatsu AB, replacing earlier E-2Cs in JASDF service. Used for Japanese air-defence radar surveillance, particularly monitoring Russian, Chinese, and North Korean military aviation activity.
France Aéronavale
3 E-2D ordered for the Charles de Gaulle aircraft carrier, replacing earlier E-2Cs and operating with Flottille 4F. Initial delivery in 2026. France is the only European E-2D operator and the only non-U.S. carrier-based E-2 operator — Charles de Gaulle being one of just four non-U.S. fixed-wing carriers globally, alongside the U.K. Queen Elizabeth class, Indian Vikrant, and Chinese Liaoning, Shandong, and Fujian.
Other operators (Egypt, Taiwan)
Egypt: 1 E-2D contracted to upgrade its existing E-2C fleet. Taiwan: 6 E-2D contracted for delivery in 2025–2027, providing Taiwan with a high-end AEW&C aircraft against potential PLA threats. Both customers are existing E-2C operators upgrading rather than new operators.

Frequently Asked Questions

What is the AN/APY-9 radar?

The Lockheed Martin AN/APY-9 is the active-electronically-scanned-array (AESA) radar that defines the E-2D's edge over the E-2C. Its AESA architecture enables: (1) detection of far more targets than the mechanically-scanned predecessor; (2) tracking of low-observable targets including reduced-RCS aircraft, low-flying cruise missiles, and sea-skimming anti-ship missiles; (3) integrated electronic-attack and electronic-protection performance against jamming; and (4) real-time radar data fusion with other strike-group sensors via the CEC network. The AN/APY-9 is the Western world's most powerful carrier-based AEW&C radar, exceeding E-3 Sentry and E-7A Wedgetail in some performance metrics despite the E-2D's smaller airframe and rotodome.

How does the E-2D compare to the E-3 Sentry?

They reflect different operating concepts. The E-3 Sentry AWACS is a USAF land-based, four-engine turbofan jet with a larger airframe, longer range and endurance, and a larger crew. The E-2D is a USN carrier-based, twin-engine turboprop with a smaller airframe, shorter range and endurance, and smaller crew. Both fill the AEW&C role, but the E-3 flies from large land bases supporting theatre-level operations while the E-2D flies from carriers supporting strike-group operations. The U.S. Air Force is replacing the E-3 with the Boeing 737-based E-7A Wedgetail, while the U.S. Navy will keep operating the E-2D — no carrier-based AEW&C successor is currently planned.

Why does the E-2D use turboprops?

Carrier compatibility. Turboprops give the E-2D: (1) lower stall speeds for slow carrier-approach handling; (2) superior take-off thrust for catapult launches without afterburner; (3) better fuel efficiency at the Mach 0.5 cruise typical of AEW&C work, where a jet would prefer Mach 0.8 or higher; and (4) less mechanical complexity than a jet engine. The Hawkeye family has retained turboprops across every variant since 1964, reflecting the continued requirement for carrier-compatible AEW&C performance. The E-2D's Rolls-Royce T56-A-427A is more powerful than the E-2C's T56-A-425, giving improved performance margins.

How long can the E-2D stay airborne?

Around 6 hours of typical mission endurance on internal fuel, rising to over 12 hours with the Block 2 in-flight refuelling fit fielded in 2018, and theoretically further still. Service ceiling is 37,000 ft and cruise speed Mach 0.5 (around 380 mph). IFR is a major mission gain, enabling sustained AEW&C coverage over the operating area without frequent shuttle trips to and from the carrier. Combat radius is roughly 600 nmi from the host ship, giving extensive surveillance coverage across the strike group's area of operations.

Can the E-2D operate over land?

Yes — and the AN/APY-9's improved low-flying and over-land target detection is one of its headline gains. The E-2C's AN/APS-145 struggled to separate low-flying targets from ground clutter, while the AN/APY-9 AESA cuts through it. That expanded performance lets the E-2D support land-based operations, particularly via the CEC network for distributed sensing in support of U.S. Army Patriot batteries, U.S. Marine Corps ground operations, and allied partners. The E-2D has also flown from forward land bases such as Andersen AFB Guam and Diego Garcia for sustained land-based missions.

What does the E-2D cost?

Around $200–220M USD per airframe depending on configuration and customer. Total programme cost runs to roughly $7–8B USD across the planned U.S. Navy fleet. The E-2D is much more expensive per airframe than the E-2C (about $80M USD in 1980s dollars), reflecting the AN/APY-9 AESA radar and the new mission system. Foreign operators (Japan, France, Egypt, Taiwan) typically pay $250–300M USD per airframe inclusive of training and initial spares.

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