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2. Helicopter flight controls - Wikipedia

   en.wikipedia.org/wiki/Helicopter_flight_controls

   Helicopters with fly-by-wire systems allow a cyclic-style controller to be mounted to the side of the pilot seat. The cyclic is used to control the main rotor in order to change the helicopter's direction of movement. In a hover, the cyclic controls the movement of the helicopter forward, back, and laterally.

3. Flapback - Wikipedia

   en.wikipedia.org/wiki/Flapback

   These two effects, combined with any aft cyclic by the pilot attempting to keep the aircraft level, can cause the rotor blades to blow back and contact the tail boom, in some cases severing it. The tail rotor is geared to the main rotor, so in many helicopters the loss of main rotor RPM also causes a significant loss of tail rotor thrust and a ...

4. Dynamic rollover - Wikipedia

   en.wikipedia.org/wiki/Dynamic_rollover

   The critical rollover angle is 5°-8°. Once exceeded, main rotor thrust continues the roll, and recovery via cyclic control is impossible. [1] A helicopter is susceptible to a rolling tendency, called dynamic rollover, when close to the ground, especially when taking off or landing. For dynamic rollover to occur, some factor has to first cause ...

5. Cyclic/collective pitch mixing - Wikipedia

   en.wikipedia.org/wiki/Cyclic/collective_pitch_mixing

   Cyclic/collective pitch mixing (CCPM) is a control concept employed in collective pitch radio-controlled helicopters. [1] CCPM reduces mechanical complexity and increases precision of control of the helicopter rotor's swashplate. Unlike conventional systems in which a single actuator is responsible for a single axis, CCPM mechanisms allow ...

6. Swashplate (aeronautics) - Wikipedia

   en.wikipedia.org/wiki/Swashplate_(aeronautics)

   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.

7. Phase lag (rotorcraft) - Wikipedia

   en.wikipedia.org/wiki/Phase_lag_(rotorcraft)

   Because of phase-lag, rolling a rotorcraft to the left or right would theoretically require a forward or backward cyclic if there were no mechanical correction. The rotor control system is angularly shifted as much as necessary to compensate for phase-lag and provide helicopter response that matches movement of the cyclic stick.