Definition
A method of using the aircraft's trim controls to relieve continuous control pressures so the aircraft maintains a desired attitude with little or no force on the flight controls. Proper trim technique involves first establishing the desired attitude and power setting, then adjusting trim to remove the resulting control pressure, rather than using trim to change the attitude itself.
Plain English
The correct way to use trim: get the airplane flying the way you want it, then adjust the trim wheel until you no longer have to push or pull on the controls to hold it there.
Context Anchor
Used in instrument flying when maintaining a precise attitude, airspeed, or altitude without unnecessary control force.
Derivation
Trim' comes from the Old English trymman, meaning 'to make ready' or 'to set in order.' In aviation, trimming sets the aircraft in order so it flies steadily without constant pilot input.
Why Pilots Care
Proper trim technique reduces pilot workload and fatigue while improving precision, especially during prolonged instrument flight or approaches.
Intuition Check
Trim technique does not mean using trim to fly the airplane for you. Fly the airplane to the desired condition first, then trim away the steady pressure needed to hold it there.
Example Sentence 1
After leveling off at the assigned altitude and setting cruise power, the pilot used proper trim technique to remove the remaining back pressure on the yoke.
Example Sentence 2
During the instrument approach the instructor reminded the student to use trim technique to relieve back pressure before tracking the localizer.