Modern Day

Chengdu J-20 – China’s Leap in Stealth Fighter Technology

The Chengdu J-20, also known as Mighty Dragon, is a fifth-generation stealth fighter aircraft developed by China’s Chengdu Aerospace Corporation for the People’s Liberation Army Air Force (PLAAF).

It is the first stealth fighter to be developed and introduced in Asia and serves as a critical asset in China’s advanced air force capabilities.

Having first flown in 2011, the J-20 was officially introduced into combat service in 2018. Its development and deployment represent significant advancements in China’s military aviation technology, underscoring the nation’s growing military prowess.



China’s first stealth fighter originated from Project 718, which began in the late 1990s. The Chinese government recognized the need to develop a next-generation aircraft to counter new and emerging fourth and fifth-generation fighters from the U.S., Russia, and Europe.

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Although details surrounding Project 718 are relatively limited due to its highly secretive nature, the project culminated with the J-20 making its first flight on January 11, 2011.

The J-20 showing off its agility.
The J-20 showing off its agility. Photo credit – emperornie CC BY-SA 2.0

The Chengdu Aerospace Corporation, a subsidiary of the state-owned Aviation Industry Corporation of China (AVIC), was selected to develop the new aircraft.

Its development was shrouded in secrecy and the details of its design, capabilities, and technologies are still largely classified.

Making its first flight on January 11, 2011 – at this time, it was powered by two Russian-made AL-31FN turbofan engines, although it was always the plan to replace these with a more advanced, domestically produced engine.

By 2017, the J-20 was reported to be in low-rate initial production, and in 2018, it was introduced into combat service.

By 2020, it was reported that the J-20 was using the domestically produced WS-10C engine, marking a significant milestone in China’s quest for a fully domestically produced advanced military aircraft.

The Shenyang WS-10 engine
The Shenyang WS-10 engine. Photo credit – China News Service CC BY-SA 3.0

The J-20’s design is believed to emphasize forward stealth, high-speed aerodynamics, advanced avionics, and long-range capabilities. It has a blended fuselage design, low-jet engine intakes, and an integrated fly-by-wire system (a system that replaces the conventional manual flight controls of an aircraft with an electronic interface).

There is some speculation that elements of the J-20’s design may have been informed by alleged Chinese cyber espionage against American defence contractors.

While such claims are hard to substantiate definitively, they form part of the broader narrative around the J-20 and its symbolic importance as a statement of China’s technological ambition.

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Stealth & Instability

The J-20’s stealth capabilities largely stem from its unique, carefully crafted design. This design aids in reducing the radar cross-section (RCS) of the aircraft, making it less visible to radar detection.

The aircraft’s exterior is coated with radar-absorbent materials (RAM). These materials are designed to absorb incoming radar signals rather than reflecting them back, significantly reducing the likelihood of detection.

This RAM coating, coupled with the aircraft’s geometric design, serves to minimize the jet’s radar signature.

Everything about the J-20 is designed to be as stealthy as possible.
Everything about the J-20 is designed to be as stealthy as possible. Photo credit – Alert5 CC BY-SA 4.0

The J-20 also features serrated patterns on its body and carefully angled edges, which further deflect radar signals away from the radar antennas. These design elements have been finely tuned to prevent radar waves from bouncing back to their source.

The aircraft’s engines are nestled deep within the fuselage to minimize their heat signature, a characteristic often used by infrared-homing missiles for targeting.

Furthermore, the J-20’s exhaust nozzles are designed to reduce infrared emissions, lessening the chance of detection by infrared sensors.

The stealth characteristics of the Chengdu J-20 also extend to its weaponry and unlike traditional fighter aircraft that carry weapons on external hardpoints, the J-20 stores its weapons internally.

This reduces the aircraft’s radar cross-section, maintains the aerodynamic design, and preserves the overall stealth profile of the aircraft.

However, it’s crucial to note that true stealth is more than just low radar visibility. It also encompasses reducing electromagnetic emissions, minimizing infrared and acoustic signatures, and employing stealthy tactics. The J-20 incorporates a combination of these features to maximize its stealth potential.

J-20s breaking formation.
J-20s breaking formation. Photo credit – emperornie CC BY-SA 4.0.


The J-20’s design features internal weapon bays to maintain its stealth profile. The main weapon bay is capable of carrying both short-range and long-range air-to-air missiles. These could include the PL-10 short-range missile and the PL-15 long-range air-to-air missile.

The PL-15 missile, in particular, is noted for its extended range, which potentially gives the J-20 an edge in beyond-visual-range (BVR) engagements.

This advanced missile features an active electronically scanned array (AESA) radar seeker. This technology allows the missile to adjust its radar beam in multiple directions without moving parts, providing superior tracking capabilities compared to mechanically-steered radar systems.

It is also reported to use dual-thrust rocket motor technology or a ramjet engine, which provides extended range. Range is speculated to be considerably long, reportedly exceeding 180 miles (300 km)!

A J-20 showing off four PL-15 missiles housed in internal bays.
A J-20 showing off four PL-15 missiles housed in internal bays. Photo credit – emperornie CC BY-SA 2.0.

The introduction of the PL-15 represents a significant leap in the aerial combat capabilities of the Chinese Air Force. The missile’s extended range, combined with its advanced guidance system, can potentially give aircraft like the Chengdu J-20 a critical advantage in long-range aerial engagements.

There are also two smaller lateral weapon bays behind the air inlets that can carry the short-range PL-10. The design of these lateral bays enables the J-20 to maintain its stealth characteristics even when the bays are open.

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The PL-10 is characterised by its all-aspect attack capability, meaning it can engage targets in any direction.

This is largely due to its high off-boresight (HOBS) capability, which allows pilots to target and fire at enemy aircraft simply by looking at them through their helmet-mounted sights, without needing to steer their own aircraft toward the target.

It also utilises an imaging infrared (IIR) seeker, which provides superior target tracking and counter-countermeasure performance compared to older generations of infrared seekers. This type of seeker is less susceptible to flares and other heat-based decoys that are typically used to distract heat-seeking missiles.

Power Dynamics in the Asia-Pacific Region

Historically, the United States and its allies have held air superiority in the Asia-Pacific region, thanks to their advanced air forces and technology.

The American F-22 Raptor and F-35 Lightning II, both fifth-generation fighter jets, have represented the pinnacle of fighter technology in the region.

These aircraft are designed to dominate the skies, conduct precision strikes, gather intelligence, and operate undetected in contested airspaces.

However, the introduction of the J-20 marks China’s entry into the elite club of nations operating fifth-generation fighter jets.

The U.S. have been deploying more of the latest F-35s in the region.
The U.S. have been deploying more of the latest F-35s in the region.

This development could challenge the current state of air superiority, particularly over contested areas such as the Taiwan Strait and the South China Sea.

While much about the Chengdu J-20 remains classified, what is evident is that its stealth characteristics mark a significant advancement in China’s military aviation capabilities.

The J-20, with its advanced stealth, avionics, and long-range missile capabilities, could potentially shift the balance in China’s favour in regional conflicts. It provides China with an enhanced ability to carry out a range of operations including air superiority, interception, and deep strike missions, significantly bolstering China’s defence capabilities.

Countries in the region have already been reacting to China’s growing military capabilities. The U.S. has been deploying its F-35s to bases within the region, and other nations such as Japan and South Korea have also purchased F-35s.

Furthermore, India has been upgrading its air force, including the acquisition of the French Rafale fighter and the development of its indigenous fifth-generation fighter, the HAL AMCA.

A model of the HAL AMCA.
A model of the HAL AMCA. Photo credit – FlyingDaggers45Squadron.

While the introduction of the J-20 itself does not instantly tip the balance of power, it’s a significant part of China’s broader military modernization efforts and indicates the country’s strategic intent.

The operational deployment and potential enhancements of the J-20 will continue to shape the military dynamics in the Asia-Pacific region, potentially leading to a shift in regional balance. As of my knowledge cut-off in September 2021, the full extent of these changes remains to be seen.


In conclusion, the Chengdu J-20 represents a significant leap forward in China’s quest for a modern, advanced fighter jet. Its development signifies the country’s commitment to match and potentially surpass global standards in military aviation technology.

While many aspects of the J-20 remain shrouded in secrecy, it is clear that this fifth-generation fighter jet, with its stealth characteristics, high-tech avionics, and potent armament, embodies China’s ambition to assert itself as a formidable player in the global aerospace sector.

Read More: The F-22 Raptor – The Fighter of the Future

The J-20 also carries implications that transcend the realm of military aviation. Its deployment reflects China’s strategic intent to assert its influence and project power in the Asia-Pacific region and beyond. This aircraft could potentially alter regional security dynamics and reshape the geopolitical landscape in the years to come.

However, the journey for the J-20 is far from over.

As China continues to evolve its military capabilities, it is anticipated that the J-20 will undergo further upgrades and improvements. As such, the global defence community will undoubtedly keep a keen eye on this representative of China’s expanding military prowess.

Ultimately, the Chengdu J-20 stands as a symbol of China’s technological and strategic aspirations. It is not merely an aircraft, but a statement of intent, an embodiment of ambition, and a step towards reshaping the aerial balance of power in the 21st century.

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  • Crew: one (pilot)
  • Length: 21.2 m (69 ft 7 in)
  • Wingspan: 13.01 m (42 ft 8 in)
  • Height: 4.69 m (15 ft 5 in)
  • Empty weight: 17,000 kg (37,479 lb)
  • Gross weight: 25,000 kg (55,116 lb)
  • Max takeoff weight: 37,000 kg (81,571 lb)
  • Powerplant: 2 × Shenyang WS-10C afterburning turbofan, 142–147 kN (32,000–33,000 lbf) with afterburner
  • Maximum speed: Mach 2.0
  • Range: 5,500 km (3,400 mi, 3,000 nmi) with 2 external fuel tanks
  • Service ceiling: 20,000 m (66,000 ft)
  • g limits: +9/-3
  • Rate of climb: 304 m/s (59,800 ft/min)