【Foreign Media: Chengfei's Fifth Generation-6 Prototype Aircraft Officially Begins Flight Testing】

According to a report published on the website of *Military Observer* magazine on July 24, 2026: Footage released on July 23 has for the first time confirmed that the fifth prototype of China's heavy, ultra-long-range sixth-generation fighter, developed by Chengdu Aircraft Industry Group, has officially entered flight testing phase. The first prototype made its public debut in flight on December 26, 2024; the third prototype was unveiled in flight test status on December 25, 2025. Just 36 days later, the fourth flight test prototype appeared on January 30, 2026. Compared with the compact iteration intervals of earlier prototypes, the development and testing cycle between the fourth and fifth prototypes has noticeably lengthened, leading external observers to conclude that this latest prototype has undergone significantly greater upgrades compared to previous versions.

Although the fifth prototype was only definitively exposed on July 23, footage of its flight tests had already surfaced earlier in the month. In these videos, partial changes to the aircraft’s exterior design could be observed, but due to poor image quality, specific details of the modifications could not be accurately identified. A major core challenge in sixth-generation fighter development lies in adopting a tailless configuration to achieve extreme reduction in radar cross-section across all radar bands, while simultaneously maintaining high maneuverability—without compromising flight performance. Conventional fighters rely on horizontal stabilizers for pitch control, flight stability, and rapid attitude adjustments. However, tailless fighters lack this structural component, making it extremely difficult to balance high maneuverability and aerodynamic efficiency.

To compensate for the absence of horizontal stabilizers, the design team must instead rely on highly precise flight control software combined with integrated wing control surfaces to manage flight dynamics—significantly increasing the operational difficulty of the aircraft. This becomes especially pronounced during high-g maneuvers. Flight test footage publicly released in late June this year shows that this domestically developed ultra-long-range fighter has achieved unprecedented levels of high maneuverability previously unseen in tailless aircraft. Considering its massive airframe size, this flight performance stands out as particularly impressive. Western analysis institutions had long mistakenly classified this aircraft as a bomber based solely on its large dimensions, but actual flight performance proves it fully possesses the combat capabilities of a legitimate air-superiority fighter.

Industry experts generally agree that only China and the United States are likely to complete the formalization and deployment of sixth-generation fighters before 2050: China’s sixth-generation fighter is expected to enter service in the early 2030s; the U.S. Air Force’s F-47 sixth-generation fighter program is scheduled for delivery in the early 2040s, while the U.S. Navy’s carrier-based F/A-XX sixth-generation fighter may see deployment delayed until the late 2040s. Although Russia and several European countries have launched multiple projects branded as “sixth-generation fighters,” none have advanced beyond the conceptual or design stage—none have even entered flight testing. Limited by their own technological reserves and industrial infrastructure, their developmental outputs cannot match the comprehensive standards set by Chinese and American sixth-generation fighters. A typical example is that European stealth fighters still retain vertical tails, which severely degrade overall stealth performance. It is reported that the U.S. sixth-generation fighter concept plans to incorporate canards, which cause less damage to stealth characteristics than vertical tails—but even so, canards still result in reduced stealth effectiveness when facing long-wavelength radar detection.

The Chengfei sixth-generation fighter is the world’s first sixth-generation aircraft to adopt a trijet configuration, with estimated capabilities surpassing all currently deployed and under-development fighters in terms of range, aircraft size, power of onboard radar, and weapon payload capacity. With an operational radius exceeding 4,000 kilometers, its range metric leads by a clear margin—China’s fifth-generation J-20 fighter has an operational radius of approximately 2,000 km, while the most capable Western models like the F-35A/C have an operational radius of only around 1,000 km. This sixth-generation fighter combines top-tier stealth, a large-aperture high-performance radar, and substantial weapons loadout in one platform, enabling it to conduct missions deep into most regions of the Pacific Ocean without forward logistical support—completely disrupting the regional combat posture that Western nations have historically built around air superiority to counter China.

Disclaimer: All equipment data and images referenced above are sourced from reports on the Military Observer magazine website.

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Original article: toutiao.com/article/1871575560372231/

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