Researchers from China’s Institute of Engineering Thermophysics have reportedly built and tested a new “adaptive cycle engine” (ACE). This is a type of next-generation jet engine that can change how it breathes depending on flight conditions, El.kz cites Interesting Engineering.

According to reports, the new engine works efficiently from takeoff to Mach 4 ( about 4 times the speed of sound). It is also able to deliver 27–47% more thrust than current engines in similar classes,

The new engine is also able to cut fuel use by about a third. If the claims are bona fide, it would outclass any publicly known U.S. engine, including the GE XA100 and Pratt & Whitney XA101 adaptive engines being developed for the F-35.

Traditional jet engines (turbofan or turbojet) are optimized for either low-speed efficiency or high-speed power, but not both. An ACE engine, on the other hand, theoretically solves that by dynamically adjusting its internal airflow paths, pressure ratios, and fuel burn cycles on the fly.

Three -stream “bypass combustion” and “inter-stage mixing” design provides some interesting features like thermal management that absorbs excess heat from electronics or stealth coatings.

It also, in theory, provides some stealth benefits by lowering exhaust temperature, thereby reducing an aircraft’s infrared (IR) signature. It could also help drag reduction through smoother flow around the airframe.

The new engine design may also improve inlet performance, allowing for better air pressure recovery at high Mach speeds.