Definition
A feature of a helicopter's Automatic Flight Control System (AFCS) that drives the cyclic stick toward a centered, trimmed position so that any pilot input is felt as a deliberate movement away from a stable reference point. It works with the force-trim and stability systems to keep the aircraft in a steady attitude when the pilot is not actively maneuvering.
Plain English
The helicopter's flight control system gently holds the cyclic stick in a steady 'home' position. When the pilot lets go, the stick stays put and the helicopter keeps flying steady. When the pilot moves the stick, they feel that they are pushing it away from that steady position.
Context Anchor
Seen in helicopter instrument flying when using stabilization or automatic flight control systems, especially during small attitude corrections.
Derivation
Cyclic' refers to the helicopter's cyclic control stick, which tilts the rotor disc to move the aircraft. 'Centering' here means returning to or holding a fixed central reference position. Together it describes the system's tendency to keep the cyclic at a centered, trimmed datum.
Why Pilots Care
Reduces pilot workload and improves stability when flying by reference to instruments.
Grounding Statement
The cyclic centering effect is the control system’s way of giving the cyclic a preferred position to stay near.
Intuition Check
Do not assume “centering” means the cyclic always returns to the exact middle of its full movement. Here, it means returning toward the position the trim or stabilization system is holding.
Example Sentence 1
With the AFCS engaged, the cyclic centering effect kept the stick steady in cruise, allowing the pilot to focus on the approach plate.
Example Sentence 2
With the AFCS engaged, the cyclic centering effect maintained trimmed flight during the instrument approach.