Pakistan’s J-35 Stealth Fighter Deal: A New Chapter in Regional Air Power Dynamics

In the Name of Allah---the Most Beneficent, the Most Merciful.

Pakistan is poised to take a significant leap in its air combat capabilities with the reported approval of a deal to acquire 40 units of the Chinese-built fifth-generation stealth fighter, the J-35 Stealth Fighter. The development, while not officially confirmed by either government, has been widely reported across multiple credible defense news platforms and further intensified by the recent high-level visit of Pakistan’s Chief of Air Staff, Air Chief Marshal Zaheer Ahmed Baber Sidhu, to Beijing in April 2025.

During his visit, Air Chief Marshal Sidhu met with top Chinese military officials, including Defence Minister Admiral Dong Jun and People’s Liberation Army Air Force Commander General Chang Dingqiu. These engagements focused on deepening military cooperation, technology transfers, joint development, and strategic alignment between the Pakistan Air Force (PAF) and the People’s Liberation Army Air Force (PLAAF). Notably, reports suggest that Pakistani pilots have already begun training in China on the J-35 platform, indicating that the acquisition process is moving forward.

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Certain reports also suggest that China has already delivered 40 J-35 Stealth Fighters to Pakistan amid heightened regional tensions, particularly during ongoing Indo-Pak military concerns. While official confirmation remains pending, this move signals an assertive strategic alignment and rapid modernization of the PAF.

Why Pakistan Could Not Procure the U.S. F-35

Pakistan’s inability to acquire the U.S.-built F-35 Lightning II stems from multiple geopolitical and strategic constraints. First, the United States maintains strict export controls on its most advanced fighter jets, selling the F-35 only to close NATO allies and select strategic partners. Pakistan’s complex geopolitical positioning, including its long-standing defense and economic ties with China, has created distrust in Washington.

Second, Pakistan’s history of nuclear proliferation concerns and its uneasy relationship with India—another key U.S. strategic partner—has influenced American reluctance to provide such cutting-edge technology to Islamabad. Moreover, the deepening U.S.-India defense partnership, exemplified by deals like the S-400 sanctions waiver and the MQ-9B drone acquisition, further isolates Pakistan from American defense platforms.

Lastly, Pakistan’s growing military-industrial cooperation with China, including joint projects like the JF-17 Thunder, positions Beijing as Islamabad’s preferred and more accessible defense partner. The J-35 acquisition is both a product of this strategic closeness and a necessity borne from U.S. restrictions.

J-35 Stealth Fighter – Detailed Overview

The J-35, also known as the FC-31 Gyrfalcon, is a twin-engine, fifth-generation stealth multirole fighter developed by Shenyang Aircraft Corporation, a subsidiary of AVIC. Initially unveiled as the FC-31 for export markets, the platform has since evolved with a navalized version intended for China’s next-generation aircraft carriers. The J-35A, the land-based version, is reportedly the variant under consideration by Pakistan.

Development Background

• The J-35, also referred to as the FC-31, is a fifth-generation stealth fighter jet developed by Shenyang Aircraft Corporation (SAC), a subsidiary of China’s state-owned AVIC.
• Initially unveiled in 2012 as the FC-31, it was developed as a private venture targeting the international market and potential use by the People’s Liberation Army Navy (PLAN).
• The designation “J-35” is believed to refer to the navalized version intended for aircraft carrier deployment, though the line between FC-31 and J-35 has blurred as development progressed.
• On 12 November 2024, the J-35A conducted its first public flight performance at the Zhuhai Airshow.

Design and Stealth Features

• Low Radar Cross Section (RCS): The J-35 features internal weapons bays, serrated engine nozzles, radar-absorbent materials, and a sleek, faceted design to reduce L-band and Ku-band radar visibility.
• Twin-engine layout: Offers better redundancy and performance, especially useful for carrier operations.
• Size and shape: Comparable in size to the F-35 Lightning II, with similarities in overall layout — suggesting competitive design thinking.

Specifications

Feature	Specification
Crew	1
Length	~16.9 meters (55 ft)
Wingspan	~11.5 meters (38 ft)
Max Takeoff Weight	~28 tons
Engines	2 × WS-13 or improved WS-19 turbofans
Speed	Mach 1.8+
Combat Radius	~1,200 km (750 miles)
Service Ceiling	~50,000 ft
Avionics	AESA radar, electro-optical systems
Weapons Bay	Internal + external hardpoints
Armament	Missiles (PL-10, PL-15, possibly CM-series) and guided bombs

Note: These specs are based on open-source assessments and may vary.

Combat Capabilities

1. Stealth & Situational Awareness

• Equipped with an Active Electronically Scanned Array (AESA) radar.
• Electro-optical targeting systems and helmet-mounted displays allow enhanced pilot awareness in contested environments.

2. Multirole Capability

• Designed for air superiority, ground attack, and electronic warfare roles.
• Internal bays enhance stealth while external hardpoints allow payload flexibility for lower-threat environments.

3. Carrier Operations

• The J-35 is expected to serve aboard China’s upcoming Type 003 aircraft carrier (Fujian), which uses electromagnetic catapults (EMALS) for launch.
• Features strengthened landing gear and tail hook for arrested recovery.

4. Combat radius refers to the maximum distance a fighter aircraft can fly from its base, perform a combat mission (such as an attack or patrol), and return to base without refueling.

So, if the J-35 has a combat radius of ~1,200 km, it means it can potentially:

And return to its base — all on a single fuel load.

Travel 1,200 km to a target,

Engage in a mission (like a strike or patrol),

Comparison with Western Counterparts

Feature	J-35	F-35 Lightning II (USA)	Su-57 (Russia)
Generation	5th	5th	5th
Radar	AESA	AESA	AESA
Stealth	Moderate-High	High	Moderate
Carrier Variant	Yes	Yes (F-35B/C)	No
Engine	WS-13/WS-19	Pratt & Whitney F135	Saturn AL-41F1
Export Status	Upcoming (e.g. Pakistan)	Widely exported	No exports yet

The J-35 is not as advanced as the F-35 in terms of battle-tested avionics, integration, and stealth, but it is considerably cheaper and available to countries that are denied Western technology.

Strategic and Export Potential

Pakistan

• Reportedly finalizing a deal to procure 40 J-35s to replace older Mirage and F-16 fighters.
• Could be deployed as a high-end stealth solution alongside JF-17s for broader capability coverage.

Global Market

• Positioned as a low-cost, fifth-generation fighter alternative for nations outside the Western sphere.
• Potential buyers may include:
  • Middle Eastern countries (e.g. Iran)
  • African states seeking advanced but affordable airpower
  • Southeast Asia (e.g. Myanmar, Bangladesh)
  • Latin America (e.g. Venezuela)

China’s Navy

• The J-35 is expected to become the primary stealth carrier fighter for the PLA Navy, offering an indigenous alternative to Russia’s Su-33-based J-15.

Limitations and Challenges

• Engine reliability: WS-13 engines lag behind Western engines in thrust and reliability; WS-19 may close this gap in the future.
• Sensor fusion: Still catching up to the seamless integration seen in the F-35’s combat systems.
• Combat testing: Yet to be combat-proven in the Indo-Pak conflict.
• Operational ecosystem: Requires support infrastructure, training, and secure datalinks to maximize potential.

The J-35 represents China’s serious entry into the fifth-generation stealth fighter market, with growing export appeal and clear strategic value for allies like Pakistan. While it may not yet rival the F-35 in overall sophistication, its combination of stealth, multirole versatility, affordability, and availability to non-Western buyers makes it a disruptive force in global military aviation.

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Designed with stealth in mind, the J-35 incorporates radar-absorbent materials, serrated engine nozzles, internal weapons storage, and an aerodynamic profile intended to reduce radar cross-section (RCS). These features position the J-35 as a potential peer competitor to Western fifth-generation fighters like the F-35 Lightning II, especially for countries outside Western defense networks.

✅ Strategic Significance for Pakistan

If completed, the J-35 deal would mark a turning point in the PAF’s modernization efforts. Pakistan seeks to gradually phase out older fleets, including Mirage III/V and aging F-16s. The J-35’s stealth, range, and advanced sensors would offer PAF a quantum leap in both deterrence and strike capabilities. It would also reduce dependence on Western platforms, which are increasingly restricted by political conditions.

With the PAF already operating Chinese platforms like the JF-17 Thunder, the acquisition of the J-35 reflects a deepening strategic trust between Islamabad and Beijing. The move could also signal a shift in Pakistan’s defense doctrine toward more technology-driven, asymmetric force projection.

Regional and Global Implications

The potential acquisition of 40 J-35s by Pakistan has regional and international ramifications. India, Pakistan’s primary rival, currently lacks a fifth-generation fighter in its active inventory. Although India has plans for its indigenous AMCA (Advanced Medium Combat Aircraft) and is in talks for foreign fifth-generation platforms, such developments will take time.

China’s export of the J-35 would also represent its first sale of a fifth-generation stealth fighter, putting it in direct competition with the U.S. F-35 in the global market. For countries sanctioned or denied Western technology, the J-35 could become an attractive, lower-cost alternative.

Conclusion

While final details and delivery timelines remain unclear, Pakistan’s pursuit of the J-35A represents a transformative step for its air force. The fighter’s advanced stealth characteristics, multirole capability, and strategic backing by China offer Islamabad a competitive edge in the evolving South Asian military landscape. If the deal proceeds as reported, the next few years could see the emergence of a stealth-enabled PAF—changing the calculus of deterrence, air superiority, and regional balance in unprecedented ways.