The Lockheed XH-51 was an experimental rigid-rotor helicopter developed in the 1960s to test high-speed rotary-wing flight ...

The Hiller X-2-235 was an experimental American coaxial helicopter developed in the 1940s that helped pave the way for the ...

The Ingenuity Mars helicopter has been more successful than anyone dared hope, lasting far, far beyond its originally planned five flights. The little helicopter recently made its 66th flight and has ...

The rotor blades that will carry NASA's next-generation helicopters to new Martian heights broke the sound barrier during March tests at NASA's Jet Propulsion Laboratory in Southern California. Data ...

Historical references to spinning flying machines go back hundreds of years, with evidence like the 12th-century Chinese twirling kite and Leonardo da Vinci's bizarre airscrew contraption of 1483.

Conventional helicopters have a built-in speed limit, imposed by the physical limitations of their top-rotor lift systems. This fascinating Airbus project has found a way to break through that speed ...

Airbus Helicopters’ Racer demonstrator is back in flight testing after a six-month lay-up to install new parts to boost the high-speed rotorcraft’s aerodynamic performance. Test sorties of the ...

The fundamental design principles behind rotary-wing aircraft date back to the Renaissance, with some of the earliest-known designs belonging to Leonardo da Vinci. Naturally, technology has ...