Developed between 1951 and 1953 by a joint research team from the Air Force and Army, working with NASA and Sikorsky Aircraft, the XV-2 (model number S-57) was built to exceed the speed limitations of ...

NH Industries is working to deliver a solution to an issue with the main rotor head on NH90 military helicopters that means the blades can impact the tail structure when starting or stopping the ...

A helicopter that crashed on Kauaʻi in July, killing the pilot and two passengers, broke up in-flight after it hit turbulence causing the main rotor blades to strike its airframe, National ...

Control allocation algorithms for quadrotor unmanned aerial vehicles (UAVs) avoid incorporating relatively minor aerodynamic effects such as ‘blade flapping' and induced drag in order to simplify the ...