Definition
The pre-set position of the elevator trim (and, where applicable, rudder and aileron trim) that the manufacturer specifies for takeoff, intended to provide manageable control forces during the takeoff roll, rotation, and initial climb. The correct setting is shown by an index mark on the trim wheel or indicator and is verified during the before-takeoff checklist.
Plain English
It is the trim setting the airplane is supposed to be in before takeoff, so the controls feel right when you lift off and climb out.
Context Anchor
Seen during the before-takeoff check inside the cockpit, often on or near the trim wheel, trim switch, or trim position indicator.
Derivation
“Trim” originally carried the idea of making something properly arranged or in good order. In an airplane, trim means adjusting the controls so the airplane feels balanced and does not require constant heavy pressure from the pilot.
Why Pilots Care
Correct takeoff trim reduces pilot workload at a critical phase, prevents early or late rotation, and produces consistent, safe liftoff performance.
Intuition Check
“Trim” does not mean cutting something here. It means setting the airplane’s control balance. “Position” means the setting of the trim control, not the airplane’s location.
Example Sentence 1
During the before-takeoff check, the pilot moved the trim wheel until the indicator lined up with the takeoff trim position.
Example Sentence 2
With the correct takeoff trim position set, the airplane rotated smoothly at the target airspeed and required only light back pressure to establish the climb attitude.