Helicopter: apparatus propelled and balanced in the air by two large propellers.
Rotor blade: part of the main apparatus that propels and lifts the helicopter.
Rotor hub: central part of the main apparatus that propels and lifts the helicopter.
Swash plane: platform that change position and support.
Fight deck: cubicle reserved for the operation of the apparatus.
Control stick: control stick of a helicopter.
Rudder pedal: foot-operated command of the rudder.
Direction synchronizing cable: set of braided iron wires used to operate the apparatus.
Skid: supportive metal device.
Fuel intake: opening in the side wall used for filing the gas tank.
Tail: tapering rear part of the fuselage.
Horizontal stabilizer: device that automatically corrects errors and deviations, and stabilizes the helicopter.
Fin: device that prevent drift.
Anti-torque trail rotor: auxiliary apparatus that assures lift and propulsion of the helicopter.

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EN : Air traffic control (ATC)
FR : Contrôle du trafic aérien
ES : Control del tráfico aéreo

          traffic control (ATC)

Air traffic control is a service provided by ground-based controllers who direct aircraft on the ground and in the air. A controller's primary task is to separate certain aircraft to prevent them from coming too close to each other by use of lateral, vertical and longitudinal separation. Secondary tasks include ensuring safe, orderly and expeditious flow of traffic and providing information to pilots, such as weather, navigation information and notices to airmen.

Animation : Helicopters