Definition
Small, hinged auxiliary surfaces attached to the trailing edge of a primary flight control (such as an aileron, elevator, or rudder) that are used to assist the pilot in moving the primary control, to reduce control forces, or to hold the primary control in a desired position. Common types include trim tabs, balance tabs, servo tabs, anti-servo tabs, and spring tabs.
Plain English
Little flaps on the back edge of bigger flight controls. They help the pilot move those controls more easily, or hold them steady, without having to keep pushing or pulling on the yoke or rudder pedals.
Context Anchor
Seen in high-speed flight control discussions, especially where the handbook explains how aircraft reduce heavy control forces at higher airspeeds.
Derivation
From the everyday meaning of 'tab' — a small flap or strip attached to a larger object. The word comes from Middle English, originally meaning a short, projecting piece. In aviation, the tab is a small projecting piece on the back of a larger control surface that helps control it — hence 'control tab.'
Why Pilots Care
At high speeds the force needed to move the controls grows rapidly; without tabs the pilot may be unable to maneuver or become fatigued.
Analogy
Like power steering on a car, where a small extra surface does part of the work so the driver does not have to push hard.
Grounding Statement
A small tab in fast-moving airflow can create enough force to help move a much larger control surface.
Intuition Check
Do not think of control tabs as labels, cockpit buttons, or simple trim devices. In this context, they are small movable surfaces that help move the main flight controls.
Example Sentence 1
After leveling off in cruise, the pilot adjusted the control tabs on the elevator to relieve the back-pressure on the yoke.
Example Sentence 2
The handbook explains that control tabs on the ailerons allow precise roll inputs without excessive physical effort above transonic speeds.