China’s Secret J-36 Stealth Fighter Prototype Breaks Cover — Thrust-Vectoring Power Meets Next-Gen Supremacy

(DEFENCE SECURITY ASIA) — Newly released imagery reveals the second prototype of China’s J-36 stealth trijet fighter undergoing active flight trials, showcasing notable refinements to its exhaust nozzles, air-intake design, and landing-gear configuration.

These visible refinements confirm that the Chengdu Aircraft Corporation’s design team is moving the platform from conceptual trials toward advanced aerodynamic and systems validation.

The J-36 retains its tailless diamond-double-delta planform and triple-engine configuration.

However, the aircraft now features newly shaped thrust-vectoring exhausts, refined diverterless inlets and a reworked undercarriage.

Such modifications suggest that Chengdu engineers are optimising airflow efficiency, internal volume and control authority across multiple flight regimes.

The J-36’s second prototype represents a distinct leap beyond the first airframe spotted in December 2024.

Where the original displayed trough-like recessed exhausts aimed at minimising rear-aspect radar and infrared signature, the newer jet adopts angular, F-22-style nozzles across all three engines.

These nozzles appear capable of two-dimensional thrust vectoring, enhancing manoeuvrability and stability at extreme attack angles.

The imagery, dated 28 October 2025, clearly indicates testing at Chengdu Aircraft Corporation’s secure flight-development complex.

It reflects China’s determination to field a stealth-optimised, long-range multi-role combat aircraft capable of competing head-to-head with U.S. and allied sixth-generation concepts such as the NGAD and FCAS.

Inside the Thrust-Vectoring Design Revolution

Thrust-vector control, or TVC, enables a fighter to deflect engine exhaust flow to enhance pitch, yaw and roll authority.

It is a technology that significantly improves agility during close-range manoeuvres or at high angles of attack.

However, it comes with engineering penalties—added weight, rear-fuselage complexity and greater heat signatures.

The J-36’s redesigned aft section indicates a comprehensive structural reshaping to house vectoring mechanics and articulation joints.

This change likely diminishes rear-aspect stealth compared with the earlier recessed trough configuration.

Yet the trade-off favours broader flight-envelope performance and superior post-stall control, critical for a tailless platform.

Analysts remain uncertain whether the system offers full two-axis deflection on each engine or employs a limited-flap design similar to early Sukhoi implementations.

If it achieves full-axis vectoring, the aircraft could attain super-maneuvrability rivaling advanced Su-57 variants while preserving most of its low-observable qualities.

The visible nozzle geometry resembles rectangular 2D designs optimised for signature flattening in the horizontal plane, echoing Lockheed Martin’s F-22 approach.

This decision reflects Chengdu’s growing mastery of LO trade-space engineering—balancing stealth, thrust efficiency and vector control through iterative prototypes.

The Shift to Diverterless Supersonic Inlets (DSI)

Earlier photographs of the first J-36 prototype showed caret-shaped lower inlets typical of legacy designs.

These have now been replaced by diverterless supersonic inlets featuring forward-swept lips.

The dorsal DSI feeding the central engine remains intact, forming the aircraft’s characteristic upper fuselage hump.

The DSI concept eliminates boundary-layer diverters, reducing structural weight and maintenance while lowering radar reflectivity.

It allows smoother airflow management without complex moving parts or bleed systems.

For a trijet, this upgrade is significant because three engines demand balanced intake pressure across all Mach regimes.

Any asymmetry in airflow could induce thrust fluctuations and pitch instability, especially in transonic conditions.

By adopting DSIs, Chengdu Aircraft Corporation ensures predictable engine performance, high-speed cruise efficiency and reduced radar exposure.

Forward-swept lower lips also improve pressure recovery at supersonic speeds, enhancing energy retention and overall engine responsiveness.

The J-36’s aerodynamic baseline therefore prioritises sustained supersonic cruise over experimental inlet geometry, which may have proven maintenance-intensive during early trials.

Together with the dorsal DSI, the tri-intake arrangement maintains optimal feeding for all engines while controlling frontal radar signature.

This highlights China’s ability to mature stealth intake design—a field once dominated by Western aerospace giants.

Landing Gear Redesign and Internal Weapons Architecture

The J-36’s undercarriage evolution underscores a broader shift toward operational practicality.

Its first prototype used a tandem-wheel main gear reminiscent of Russia’s Su-34 strike fighter.

That arrangement required deep bays and longer fuselage volume, optimised for heavy take-off weights.

The latest prototype employs a twin side-by-side main-wheel truck layout and a twin-wheeled nose gear.

This configuration shortens the gear-bay length, freeing longitudinal fuselage space for internal fuel and weapons storage.

Imagery of the ventral section reveals one large central weapons bay flanked by two smaller lateral bays.

This suggests capacity for long-range standoff munitions in the main bay and medium-range air-to-air or precision-guided weapons in the side bays.

Such an internal arrangement enhances stealth while allowing diverse mission loadouts—from deep-strike to air-superiority operations.

The redesign also enhances ground-handling stability, improving taxi control and runway performance for a heavy airframe.

By shortening the retraction cycle and adopting a conventional truck stance, the J-36 gains greater durability for routine operations from hardened bases or dispersed airstrips.

The freed internal volume may also accommodate enlarged fuel tanks, extending the aircraft’s combat radius far beyond twin-engine contemporaries.

This is vital for power projection across the vast Indo-Pacific theatre, where operational distances exceed 1,500 kilometres (≈ 930 miles).

Every element of the redesign reflects a maturing engineering philosophy—balancing stealth, payload and maintainability rather than pure experimental ambition.

Strategic Implications for the Indo-Pacific Air Balance

The J-36 programme signals more than a technological leap; it represents an evolution in China’s air-power doctrine.

Its projected role extends beyond that of a traditional dogfighter.

With its large canopy and probable twin-crew arrangement, the J-36 appears conceived as a multi-role “sensor-shooter” platform.

One crew member would manage flight and vector control, while the other oversees sensor fusion, electronic warfare and weapons coordination.

Chinese defence analysts speculate that the J-36 could function as a command node linking loyal-wingman UCAVs, swarm drones and surface sensors into a network-centric kill-chain.

Large electro-optical apertures and side-looking RF arrays visible on its nose support this multi-spectral role.

If confirmed, the J-36 would integrate into PLA Air Force’s emerging “system-of-systems” doctrine, where manned platforms orchestrate unmanned strike assets.

Open-source scale comparisons estimate the J-36 at 27–30 metres (≈ 89–98 feet) in length with a 19–21 metre (≈ 62–69 feet) wingspan.

These dimensions place it significantly above the J-20 and F-22 in size and payload capacity.

Analysts project a gross take-off weight between 50 and 70 tonnes, allowing large internal fuel reserves and extensive endurance.

If powered by advanced WS-15 turbofans producing over 16,000 kgf (≈ 157 kN) each, the trijet could deliver exceptional climb rates and super-cruise performance.

Such thrust margins enable the J-36 to operate deep into maritime zones without frequent aerial refuelling.

For regional forces—from Japan and South Korea to India and Australia—this represents a new strategic variable.

A stealth-capable, long-endurance PLAAF asset would complicate air-defence planning across the South China Sea, East China Sea and even the Western Pacific.

For Malaysia and other ASEAN states, the J-36 underscores China’s ability to sustain persistent air presence over disputed maritime zones.

This evolution compels Southeast Asian air forces to accelerate networked sensor integration, enhanced AWACS coverage and modernised BVR weapon inventories.

The J-36’s arrival also pressures Western manufacturers to expedite sixth-generation programmes such as the US NGAD and the European FCAS to maintain technological superiority.

Its mere flight readiness reshapes expectations of when China could field an operational sixth-generation fighter—potentially before 2032.

Deep Technical and Geo-Strategic Analysis

A tailless diamond-double-delta planform provides excellent RCS reduction from multiple aspects while maintaining high lift and low drag.

The blended-body fuselage merges smoothly with the wing, maximising internal storage volume.

Such geometry enables internal carriage of both large standoff weapons and advanced ISR pods without compromising stealth.

The trijet layout supplies higher total thrust and redundancy, crucial for long missions over water or hostile environments.

It also offers improved gross-weight tolerance, allowing the J-36 to carry more fuel and armament internally.

Nevertheless, three engines generate more heat, raising IR signature and maintenance demands.

To offset these penalties, engineers likely employ advanced ceramic coatings and RAM-treated composite exhaust shields.

The J-36 will require cutting-edge fly-by-wire systems, possibly with AI-assisted flight-control logic, to maintain stability across its broad flight envelope.

Its TVC nozzles may coordinate with digital flight-control computers to manage yaw and pitch without vertical tails.

This synthesis of software and aerodynamics places the J-36 in the same conceptual category as NGAD, Tempest and SCAF designs.

From a doctrinal viewpoint, the J-36 fits China’s need for long-range air dominance and precision-strike capability in the Indo-Pacific.

Its range and payload could allow it to escort H-20 stealth bombers or act as their forward sensor extension.

Within China’s A2/AD strategy, the J-36 would operate as a forward screen—detecting, jamming and engaging intruders before they reach coastal defence zones.

For the U.S. and allied Pacific forces, this complicates ISR operations and demands next-generation counter-stealth radar coverage.

The aircraft’s potential for persistent loiter, high-altitude super-cruise and heavy internal fuel reserves makes it a formidable endurance asset.

If coupled with advanced air-to-air missiles like PL-15E or PL-17, the J-36 could threaten tankers and AWACS platforms critical to Western operations.

Its capability to network with drones expands the PLA Air Force’s reach exponentially.

Economically, each J-36 is estimated to cost around US $100–150 million—equivalent to RM 470–705 million—placing it between the F-35A and NGAD in cost-bracket analysis.

Given China’s industrial capacity and domestic supply chain resilience, large-scale production could drive per-unit cost downward, enabling wider PLAAF deployment.

China’s Stealth Trijet Enters a New Phase

The latest imagery of the J-36 prototype leaves little doubt that China’s sixth-generation stealth-fighter programme is accelerating into advanced flight validation.

The combination of thrust-vectoring exhausts, DSI inlets and refined landing gear demonstrates a maturing, combat-oriented configuration.

With its three-engine architecture, vast internal capacity and multi-role sensor-fusion design, the J-36 is emerging as China’s most ambitious combat aircraft yet.

While critical unknowns remain—including exact TVC capability, power-plant configuration and operational timeline—the observable refinements mark tangible progress.

For the Indo-Pacific region, the J-36 is no longer a speculative concept.

It is a developing weapon system poised to redefine air power equilibrium across Asia.

Defence planners and analysts alike must now treat the J-36 as a near-term factor in strategic calculations, not a distant aspiration.

China’s J-36 programme epitomises how Beijing is transforming aerospace ambition into operational reality.

The stealth trijet’s emergence confirms that China is not merely catching up but actively redefining the design parameters of sixth-generation air combat.

Its silhouette over Chengdu’s skies heralds a new era—one in which Asia’s air-power contest has definitively entered the next generation. — DEFENCE SECURITY  ASIA