China is working on a compact stealth cruise missile designed to fit inside the internal weapons bays of its latest stealth fighters, according to technical design documents shared on Weibo. The material surfaced outlines a weapon tailored for use with the J-20 and J-35 aircraft.

The documents describe a missile shorter than 13.1 feet with a diameter under 2.8 feet. These dimensions match the internal bay limits of China’s fifth generation fighters. The goal is clear. The missile can be carried without being exposed to radar, allowing the aircraft to maintain a low observable profile during approach.

Both the J-20 and the newer J-35 rely on internal weapon carriage to reduce detection risk. A missile that fits inside these bays can travel with the aircraft deep into contested airspace. It is only released close to the launch point, limiting the time it is visible to enemy sensors.

Aerodynamic features shaped for low detection

The design shows a blended body with fixed wings and a V-tail. The wings are arranged in a parallel layout, and the rear features a serrated exhaust nozzle. This type of nozzle helps scatter radar waves, reducing the chance of detection.

The V-tail has a second role. It helps shield the engine exhaust from infrared sensors, especially those looking from below or behind. This adds another layer of protection against tracking systems.

Every visible feature in the design appears focused on reducing detection across radar and infrared systems. The approach reflects techniques already used in stealth aircraft.

Advanced infrared suppression system

The missile includes a detailed system to reduce heat emissions. Four cooling nozzles are placed around the engine exhaust. These inject cooler air into the hot exhaust stream, lowering its infrared signature.

The exhaust system is also recessed behind an outer shroud. This hides the hottest parts from most viewing angles. A layer of rock wool insulation surrounds the engine to limit heat transfer to the outer body.

The V-tail further blocks the exhaust when viewed from behind. Together, these features form a layered system that addresses heat visibility from several directions. The design documents state that this setup is expected to improve infrared stealth performance significantly.

Range and strategic implications

The missile is designed for subsonic flight. It has a cruise speed of about 0.71 Mach and a maximum speed near 0.75 Mach. Its range is listed at 826 miles.

Subsonic speed reduces heat and noise, which helps maintain stealth. The long range allows it to be launched far from defended areas. A stealth fighter could release the missile well outside the reach of many naval defenses.

The documents also compare the design to the U.S. AGM-158C Long Range Anti-Ship Missile. That missile is too large to fit inside the internal bays of stealth fighters like the F-35 or F-22. It must be carried externally, which increases radar visibility during approach.

China’s compact design removes that limitation. Aircraft and missile can remain concealed until launch. This changes how such weapons might be used in a high-end naval scenario.

The concept points toward a system aimed at long range maritime targets. A stealth missile carried internally, combined with a fleet of over 200 J-20 aircraft, could present a complex challenge for naval defenses. Actual effectiveness will depend on testing and real-world performance once the system is built.