The science behind how helicopters turn midair is straightforward enough. Most of them usually come with main and tail rotors, which spin to create lift for the craft. This lift can be controlled by ...

TIANJIN, China — Avicopter is developing a technology demonstrator for a high-speed helicopter, adopting a compound configuration that combines coaxial rigid rotors and nose-mounted counter-rotating ...

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 ...