Helicopters are marvelous pieces of engineering, providing a live demonstration of the laws of physics as they carry us into the skies. With metal or composite blades angled just right and spinning at ...

Rotor wash — the powerful wind generated by helicopter blades — forced a teacher’s umbrella open and knocked her off balance, leading to a fatal fall last year at Kadena Air Base, Okinawa, according ...

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 ...