No engine power. No powered rotor. And yet a helicopter can still descend under control and, under the right conditions, make a survivable landing. The secret is autorotation: instead of the engine ...

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 ...

The doomed NBC helicopter that crashed in LA may have been caught in a terrible predicament because of the flight conditions the aircraft encountered while covering a bus crash, experts have warned.