Definition
In a helicopter, the control stick that tilts the main rotor disc in the direction the pilot wants to go. Moving the cyclic forward, aft, left, or right tilts the rotor disc the same way, which in turn tilts the lift force and moves the helicopter horizontally in that direction.
Plain English
The stick a helicopter pilot moves to make the helicopter go forward, backward, left, or right. Pushing it in a direction tilts the spinning rotor blades that way, and the helicopter follows.
Context Anchor
Used in helicopter instrument flying when discussing how the pilot controls aircraft attitude by reference to the flight instruments.
Derivation
From the Greek 'kyklos' meaning 'circle' or 'wheel'. The control is called 'cyclic' because it changes the pitch of each rotor blade once per revolution -- the blade pitch cycles up and down as it goes around the rotor disc. That cyclical change in pitch is what tilts the disc.
Why Pilots Care
It provides directional control and attitude changes essential for all helicopter flight, including hover, turns, and instrument approaches.
Intuition Check
Cyclic does not mean a control used only in repeated steps. Here it means the control changes each rotor blade’s angle as the blade moves around the rotor circle.
Example Sentence 1
The instructor demonstrated how a small forward movement of the cyclic was enough to start the helicopter moving across the ramp.
Example Sentence 2
Small cyclic inputs kept the helicopter in a stable hover during the instrument approach.