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PLAAF KJ-2000

CETC / AVIC · Airborne Early Warning (AEW&C) · China · Modern (1992–2009)

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The PLAAF KJ-2000 'Mainring' (Chinese designation '空警-2000' / 'Kongjing-2000' — 'Air Police 2000') is a Chinese four-engine airborne early warning and control (AEW&C) aircraft developed jointly by Xi'an Aircraft Industrial Corporation and Israel Aerospace Industries (IAI Phalcon). Chinese indigenisation followed the July 2000 cancellation of the original Israeli supply contract under U.S. pressure. The platform uses the Russian Ilyushin Il-76TD airframe — PLAAF-purchased aircraft reworked to AEW&C configuration. Service entry with the People's Liberation Army Air Force (PLAAF) came in 2007, giving China its first indigenous AEW&C aircraft in a role parallel to the U.S. E-3 Sentry AWACS and Russian Beriev A-50 'Mainstay'. Between 4 and 5 KJ-2000 are in active PLAAF service. Production was capped by the 2000 IAI Phalcon cancellation, which forced indigenous Chinese radar work, and by the later KJ-200 / KJ-500 AEW&C variants carrying newer sensors.

Dimensions follow the Il-76TD: 152 ft (46.6 m) long with a 165-ft (50.4 m) wingspan. Empty weight is around 220,000 lb and maximum take-off weight reaches 414,000 lb. Four Soloviev D-30KP-2 turbofans, each rated at 26,500 lbf — the same engines as the baseline Il-76 — drive the aircraft to 540 mph (Mach 0.83), a service ceiling of 39,400 ft, and a range of 4,500 nmi. Its defining external feature is a large dorsal radar fairing housing a Chinese-developed AESA-equivalent system, mounted as a cylindrical fixed disc rather than the rotating rotodome typical of Western designs. Mission stations inside the cabin support the AEW&C operator workload.

Mission tasking centres on airborne early warning and control: detecting, tracking, and classifying air, surface, and missile targets at extended range, then passing battle-management data to PLAAF strike-fighter aircraft (J-10, J-11, J-16, J-20), Chinese Navy ships, and other supported forces. Together the KJ-2000, KJ-200, and KJ-500 give the PLA a credible AEW&C fleet, though smaller than the combined U.S. AWACS / E-2D Hawkeye force. For some mission sets the KJ-2000 has been progressively displaced by the smaller, newer KJ-500 (Y-9-derived). It remains the PLAAF's principal large-AEW&C platform pending introduction of the future KJ-3000 (Y-20-based) in the late 2020s.

For Kids — a shorter, friendlier version

The KJ-2000 Mainring is China's flying radar plane. It is built on the big Russian Il-76 transport, with a huge round radar disk added on top. From the air, KJ-2000s watch the sky for enemy planes, drones, and ships, much like the U.S. E-3 Sentry but made in China.

The KJ-2000 first flew in 2003 and entered service in 2007. Its radar disk is 14 meters wide — about the size of a swimming pool. Unlike older flying radars, the KJ-2000's radar does not spin; it uses electronic beams to scan the sky in any direction. That technology is similar to what's on the U.S. E-7 Wedgetail.

About 15 crew members work at radar screens inside the cabin. The plane stays airborne for up to 7 hours during a single mission. Four big Russian engines push it through the air at 530 mph, the same speed as a normal airliner.

Only about 5 KJ-2000s have been built. China started with old Russian Il-76 bodies but later moved to a smaller, newer plane called the KJ-500. Together the KJ-2000 and KJ-500 give China a strong flying radar network across the Pacific.

Fun Facts

The radar disk on top is 14 meters wide, larger than a swimming pool.
The radar does not spin; it uses electronic beams to scan the sky.
About 15 crew members work inside the KJ-2000 during a single mission.
Only 5 KJ-2000s have been built, all for China.
The Russian Il-76 body underneath was originally a heavy cargo plane.
The smaller KJ-500 replaced the KJ-2000 in new production starting 2014.
KJ-2000 missions can last over 7 hours, longer than most airliner flights.

Kids’ Questions

What does the disk do?

The big disk on top of the KJ-2000 holds the plane's main radar. Inside the disk are thousands of small antennas. The antennas work together to send out radar beams in every direction, looking for aircraft and ships. The crew sees a map of every plane within 250 miles, friendly or not.

How is it like the U.S. E-3 Sentry?

Both planes do the same job: they fly high and watch the sky with powerful radars. The E-3 has a slowly spinning radar disk, while the KJ-2000 has an electronic-beam radar that doesn't move. The KJ-2000 is bigger because the Il-76 it's built on is bigger than the Boeing 707 under the E-3.

Why only 5?

The KJ-2000 used Russian Il-76 bodies that China had to import. When Russia and China had trade problems in the early 2000s, only a few Il-76s arrived. So China switched to making the smaller KJ-500 based on Chinese transports instead. China has 30+ KJ-500s today, and that's the main flying radar plane now.

Variants

KJ-2000 (initial 2007): Original 2007 production variant. 4-5 delivered to PLAAF. Backbone of Chinese large-AEW&C coverage.
KJ-200 'Moth' (smaller AEW&C): Smaller AEW&C variant on the Y-8 transport airframe. About 9 in PLAAF service. Provides distributed AEW&C coverage that supplements the KJ-2000.
KJ-500 'Mainring-derivative': AEW&C variant on the Y-9 transport airframe. 25+ in PLAAF and PLAN Aviation service. Newer AESA radar and mission systems than the KJ-2000.
KJ-3000 (planned next-generation): Future AEW&C variant on the Y-20 transport airframe. In development from the 2020s; first flight 2024. Frontline fielding expected from 2027. Will replace the KJ-2000 and complement the existing KJ-500 fleet.

Notable Operators

People's Liberation Army Air Force (PLAAF): Sole operator. 4-5 KJ-2000 in active service, distributed across PLAAF long-range-aviation regiments providing AEW&C support for major exercises and frontline tasking.
Future / planned: PLAAF plans continued KJ-2000 operations through KJ-3000 introduction (2027+). The KJ-500 family (25+) supplies distributed AEW&C coverage alongside the KJ-2000. Combined Chinese AEW&C strength through 2030 is projected at 40+ aircraft across all variants.

Frequently Asked Questions

What was the 2000 IAI Phalcon cancellation?

In July 2000 Israel cancelled supply of the IAI Phalcon AEW&C system for the Chinese KJ-2000 under U.S. diplomatic pressure. Israel had been close to delivering the Phalcon AESA radar on a Russian Il-76 airframe under an Israeli-Chinese cooperation programme begun in 1996. Washington's pressure on Israel was driven by concerns over transferring sensitive AEW&C technology to China, the implications for Taiwan, and broader area security. Israel paid a cancellation penalty of roughly $350M USD to China, after which KJ-2000 development continued with indigenous Chinese radar work. The episode strained U.S.-Israeli relations and Israeli-Chinese defence cooperation, and established a precedent for U.S. veto over Israeli arms exports involving sensitive technology.

How does KJ-2000 compare to E-3 Sentry?

Both are large four-engine AEW&C aircraft. The Boeing E-3 Sentry AWACS is a U.S. design on the 707 airframe, fitted with the AN/APY-1 / AN/APY-2 radar, with around 33 in active U.S. service. The KJ-2000 'Mainring' is a Chinese design on the Il-76 airframe, fitted with an indigenous AESA-derivative radar, with 4-5 in PLAAF service. The E-3 has the larger fleet and far longer service record. KJ-2000 deployment has been limited largely to Chinese training and occasional sorties near the first island chain. Both matter in service but on very different scales — the E-3 anchors Western AWACS coverage, while the KJ-2000 represents Chinese AEW&C heritage now being overtaken by the KJ-500 and future KJ-3000.

Why did China only build 4-5 KJ-2000?

Several factors converged. Il-76 airframe supply was limited — China imported only a small number of Il-76 transports suitable for AEW&C conversion. The IAI Phalcon cancellation forced indigenous radar development, slowing initial production. KJ-200 and KJ-500 development then moved AEW&C onto Chinese Y-8 / Y-9 airframes, sidestepping the Il-76 supply problem. The Y-20-based KJ-3000 will provide the next large-AEW&C step. The KJ-2000 thus stands as a transitional aircraft — overtaken by the KJ-500 and the future KJ-3000.

What are KJ-200 / KJ-500?

These are smaller distributed Chinese AEW&C variants. The KJ-200 'Moth' (about 9 in service) uses the Y-8 transport airframe with a dorsal beam-mounted radar — a different layout from the KJ-2000 rotodome. The KJ-500 (25+ in service) uses the Y-9 transport airframe (a Y-8 derivative) with newer AESA radar and mission systems. Together the KJ-200 / KJ-500 family supplies distributed Chinese AEW&C coverage that supplements the KJ-2000 and offers flexibility across mission profiles. The KJ-500 has progressively displaced the KJ-200 for new procurement and is now the principal Chinese AEW&C platform.

Sources

AVIC — KJ-2000
Wikipedia — KJ-2000 — CC BY-SA.