Wikipedia:Bak pasir

Rotary-Wing Aircraft Components

A. Fuselage - Houses the same components as a fixed-wing aircraft fuselage. It i \s not built for high altitude pressurization and is not as ruggedly constructed as lager fixed wing aircraft, causing helicopters to fragment more during crash impacts.

B. Main Rotor [S] - Provide lift and propulsion for the helicopter to fly. some helicopters are designed with two main rotors, and others have one main rotor and one tail rotor. Depending on the helicopter type and use, the main rotor may consist of two to seven rotor blades.

C. Tail Rotor - Provides the helicopter with directional control. It counteracts the torque produced by the main rotor. Some newly designed helicopters can operate by using engine exhaust to provide control of the aircraft, thus eliminating the need for a tail rotor.

D. Landing Gear - Used to support the aircraft when it is not in flight. The two types of landing gear assemblies are conventional and skid support.

  1. Conventional gear consist of main gear and either a nose or tail gear. This gear may or may    not retract depending on the type of helicopter. Retractable landing gear is housed in pontoons that provide flotation support for helicopters that land in water.

  2. Skids are used on smaller helicopter in the place of conventional landing gear. The skids are permanently mounted to the exterior and resemble platforms. Because they are without wheels, helicopters with skids often "hover taxi" to move along taxiways or the parking ramp.