Photos shared on X (formerly Twitter) on 21/8 show a prototype of a new Chinese helicopter in flight at an undisclosed location. The aircraft utilizes a coaxial main rotor system and a rear-mounted pusher propeller, mirroring the design of the Sikorsky S-97 Raider developed in the US.

The helicopter's designation remains unknown, and Chinese officials have not commented on the images.

Prototype of the new Chinese helicopter in a photo posted on 21/8. Photo: X/Rupprecht_A

"It appears to be a direct copy of the S-97. Both China and the US are exploring the advantages of this design, which offers significantly improved speed and maneuverability compared to conventional helicopters," commented Thomas Newdick, editor of the US military website War Zone.

The two aircraft share similar size and shape, with elongated fuselages tapering towards the rear and a common landing gear configuration. The Chinese helicopter also features large horizontal stabilizers and small vertical stabilizers at the tips. However, some differences exist, particularly in the design of the vertical stabilizers.

The rotor design of the S-97 and the new Chinese helicopter enables rapid acceleration and deceleration, enhanced maneuverability, and higher cruise speeds. The range is also improved compared to conventional helicopters, though not as extensive as hybrid aircraft like the V-22 Osprey.

The S-97 helicopter. Photo: Sikorsky

This design also allows the aircraft to achieve maximum speed in level flight, eliminating the need to nose down for acceleration like traditional helicopters.

Developed by Sikorsky based on the X2 prototype, the S-97 Raider reportedly has a top speed of 440 km/h and achieved over 400 km/h in tests, significantly exceeding the maximum speed of conventional helicopters.

These images emerged just days after China tested a prototype hybrid helicopter with an engine cluster resembling the MV-75, also known as the V-280 Valor, developed by Bell in the US.

Pham Giang (According to War Zone)