In the early 1950s, Hughes Aircraft pursued one of the most extreme helicopter experiments ever attempted. The result became the Hughes XH-17, a gigantic aircraft built around the largest rotor system ...

Live-fire trials of the AH-64 with XM1225 APEX ammunition come as both U.S. and Russian attack helicopters experiment with proximity-fused cannon rounds to defeat small UAVs. The U.S. Army conducted ...

In order to increase flight speed, coaxial high-speed helicopter is getting more and more attention. Due to the complexity of its transmission system, this study mainly deals with dynamics reduction ...