Helicopter flight is governed by the interaction of four physical forces: thrust, drag, weight, and lift. Lift is generated using airfoils—rotor blades with a curved top and flat bottom. Based on ...

Add Yahoo as a preferred source to see more of our stories on Google. A Mexican Navy MI-17 helicopter was forced into a hard landing after suffering a sudden loss of engine power shortly after takeoff ...

Mechanical failure and a low-altitude flight combined to limit the options of the 28-year-old pilot who died nearly two years ago when the engine seized in the helicopter he was flying and it crashed ...

Air Accident Investigation Unit found no evidence to indicate any pre-existing problem with any engine part of the aircraft ...