This helicopter has dual-crossing rotors for ... rotors eliminating the need for a tail rotor. These opposite-spinning rotors lend the K-MAX a natural tendency to hover, making it more stable.

The Robinson crashed into a stationary helicopter, causing the propellers to collide with the other aircraft before ...

as seen in helicopters and multirotors. A much less popular solution is the cyclocopter, which consists of a pair of rotors spinning around a horizontal shaft with horizontal blades. [Nicholas ...

But thanks to a doctoral thesis he found, it’s also possible to control a traditional single-rotor helicopter by substituting ... single revolution when it’s spinning at 3,000 RPM is no ...

Lockheed Martin subsidiary Sikorsky has successfully flown an electric-powered, 115-lb (52-kg) autonomous drone that uses what it calls a "rotor blown wing" to fly like both a helicopter and an ...

Sikorsky on Monday detailed recent successful demonstrations with its “rotor blown wing” unmanned aircraft system (UAS), ...