A $240 million contract to upgrade Army Special Operations Aviation Command helicopters boosts orders at Boeing's Delco plant ...

But thanks to a doctoral thesis he found, it’s also possible to control a traditional single-rotor helicopter by substituting flexible rotor hinges and precise motor speed control for the ...

The swinging bucket rotor allows the tube to change angle during the run. The buckets are vertical when stopped and horizontal when running. The parallel geometry of the swinging buckets allow the ...

Lockheed Martin's Sikorsky has successfully flown its "rotor blown wing" uncrewed aerial system in both helicopter and fixed-wing flight modes, it announced Monday. The 115-pound twin-prop drone ...