【Foreign Media: Major Design Upgrades Revealed for China's J-36 Stealth Fighter】

According to a report from Defense Security Asia on July 13, 2026: The latest appearance of the prototype for China’s J-36 stealth fighter provides evidence of refined improvements in inlet design and aerodynamic configuration—potentially enhancing its operational effectiveness in high-threat environments across the Indo-Pacific region. This sighting further corroborates the view that China is pursuing iterative advancements within its sixth-generation fighter program, aiming to achieve superior stealth performance and extended operational range when confronting advanced adversary air defense systems during regional crises.

Military assessments from U.S. and Chinese defense officials describe the J-36 as a sixth-generation air dominance platform developed by Chengdu Aircraft Industry Group, featuring a tailless trijet layout capable of integrating long-range strike and command-and-control functions. Observed modifications indicate a deliberate shift from early verification prototypes toward more mature engineering solutions, addressing the trade-off between low detectability and actual flight handling qualities in contested airspace. Such changes could significantly alter strategic calculations among regional actors—the J-36 can now conduct deeper penetration missions with reduced detection risk while maintaining high payload capacity and long endurance suitable for Pacific theater operations.

—— Evolution of the J-36 from Initial Sighting to Refined Prototype

The J-36 made its public debut during a test flight over Chengdu on December 26, 2024, accompanied by a twin-seat J-20S, confirming its affiliation with Chengdu Aircraft Industry Group and its large tailless trijet architecture. Early observations established a baseline configuration: a wedge-shaped lower inlet, embedded exhaust arrangement, and tandem main landing gear—primarily optimized for initial stealth validation rather than combat maturity.

By the end of 2025, analysts documented at least three distinctly different prototypes, indicating an accelerated iteration process under the sixth-generation fighter development framework to evaluate competing engineering solutions. Around October 2025, the second prototype was sighted, introducing measurable changes beyond the characteristics of the first prototype’s verification model, shifting toward a configuration better suited for sustained flight testing and performance evaluation. A third prototype appeared in December 2025, further demonstrating an ongoing refinement cycle—differences in test instrumentation and accompanying aircraft crews supported incremental data collection on handling qualities.

This evolution underscores the J-36’s role as a heavy platform bridging fighter and strike missions, featuring side-by-side crew seats that may enhance command capabilities over unmanned systems during prolonged operations.

—— Technical Details of Inlet Modifications on the Second Prototype

The second prototype revised its lower side inlets, transitioning from a wedge geometry to a boundary-layer-invisible supersonic inlet (DSI) with a forward-swept lip. This modification improves high-speed pressure recovery while reducing foreign object ingestion risks during ground operations. The upgrade retains the mature dorsal DSI inlet previously designed for mid-mounted engines, while enhancing overall airflow management across different flight regimes within the trijet propulsion layout.

These DSI-based improvements in boundary layer control help reduce the inlet structure’s contribution to radar cross-section and support better engine performance efficiency in crucial supersonic cruise profiles essential for long-range missions. These changes address potential limitations of the initial configuration, optimizing inlet performance for transonic and supersonic regimes—where large tailless airframes must maintain high-speed penetration without compromising stealth characteristics.

Overall, the inlet refinements reflect targeted engineering responses to performance data gathered from early prototype flights, thereby strengthening the J-36’s viability as a sixth-generation asset.

—— Aerodynamic Shape Modifications and Their Impact on Flight Characteristics

The second prototype replaced the first model’s embedded exhaust deck layout with angular two-dimensional thrust vectoring nozzles similar to those on the F-22, introducing much-needed pitch control authority for tailless aircraft stability and maneuverability. This exhaust modification comes at the cost of partially sacrificing rearward infrared signature suppression, but it delivers enhanced flight control response—compensating for the absence of conventional tail surfaces at high angles of attack.

The landing gear was reconfigured from tandem to parallel dual-wheel bogie type, improving ground handling stability and braking performance, while potentially optimizing internal volume allocation for large weapon bays and fuel systems within the massive airframe. Together, these aerodynamic adjustments address inherent handling limitations of early tailless designs—recovering control authority through thrust vectoring without adding vertical or horizontal stabilizers that would compromise stealth.

The improvements enable sharper maneuvers and better takeoff performance, expanding the J-36’s operational flexibility in dynamic combat environments where rapid response and evasion can be decisive. Thrust vector integration supports the power demands of the trijet layout while increasing safety margins in carrier-style or forward-deployed operations, where precise control is critical. Overall shape refinement helps reduce drag and improve lift distribution across the diamond-shaped double-delta wing planform, optimizing the aircraft for supersonic cruise and long-endurance profiles required in the Pacific theater.

Disclaimer: All equipment data and images referenced above are sourced from reports by Defense Security Asia.

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Original Source: toutiao.com/article/1870587174776841/

Disclaimer: The views expressed in this article are solely those of the author.