• Two prototypes for China's future stealth strike fighter took the skies in broad daylight.
• Both appear to be advanced flying wing designs useful for attack missions.
• China watchers buzzed about the possible roles of a fighter that could rival US aircraft.

Two prototypes for China's future stealth strike fighter took the skies in broad daylight in recent days, showcasing China's growing aerospace might as it tries to match the US.

The designs appeared intended to make a splash. One showed a triangular aircraft similar to America's retired F-117 Nighthawk stealth fighter, with some notable differences. The prototype by Chengdu Aerospace Corporation lacked a tail and fin-like vertical stabilizers and was powered by three engines; a new video shows it in a low-altitude turn accompanied by a J-20 Mighty Dragon stealth fighter.

Photos and videos also recently captured a stealth prototype, attributed to Shenyang Aircraft Corporation, fueling speculation the aircraft may be rivals.

The sightings immediately prompted questions among aviation watchers about whether these designs were stealthy strike aircraft (designed to ground-attack areas guarded by air defenses) or contenders for a leap-ahead sixth-generation air superiority fighter, of the sort the US is struggling to define.

"Fascinating that the [People's Liberation Army Air Force/Chinese Communist Party] have chosen to fly this prototype in daylight now," Justin Bronk, an airpower expert at the UK's RUSI think tank, said on X. "I suspect more likely to be the 5th Gen regional bomber/strike fighter project sometimes called J/H-XX."

A Defense Department report released in mid-December said that China "is developing new medium- and long-range stealth bombers to strike regional and global targets."

Both prototype aircraft appear to be flying wing designs, which more efficiently distribute an aircraft's load and reduce drag. These aircraft are more inherently unstable and require automated fly-by-wire systems that constantly change the aircraft's flight controls. The US Air Force has leaned into this design with its Northrop B-2 Spirit and Northrop Grumman B-21 Raider bombers.

By eliminating a tail and vertical stabilizers, the flying wing reduces the number of angled surfaces that can produce radar returns. These types of aircraft may be able to strike defended areas before being detected on radar.