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Helicopter flight controls are used to achieve and maintain controlled aerodynamic helicopter flight. [1] Changes to the aircraft flight control system transmit mechanically to the rotor, producing aerodynamic effects on the rotor blades that make the helicopter move in a desired way.
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The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."
1. Non-rotating outer ring (blue). 2. Turning inner ring (silver). 3. Ball joint. 4. Control (pitch) preventing turning of outer ring. 5. Control (roll). 6. Linkages (silver) to the rotor blade. In aeronautics, a swashplate is a mechanical device that translates input via the helicopter flight controls into motion of the main rotor blades.
The pilot's primary control of the rate of descent is airspeed. Higher or lower airspeeds are obtained with the cyclic pitch control just as in normal flight. Rate of descent is high at zero airspeed and decreases to a minimum at approximately 50 to 90 knots, depending upon the particular helicopter and the factors previously mentioned.
The controls (stick and rudder) for rotary wing aircraft (helicopter or autogyro) accomplish the same motions about the three axes of rotation, but manipulate the rotating flight controls (main rotor disk and tail rotor disk) in a completely different manner. Flight control surfaces are operated by aircraft flight control systems.
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Flight controls may refer to: Flight control surfaces, the movable surfaces that control the flight of an airplane; Aircraft flight control system, flight control surfaces, the respective cockpit controls, and the systems linking the two; Helicopter flight controls, similar systems for a helicopter; Triangle control frame, the A-frame-like ...