Plain English Meaning

A control that holds the rudder slightly deflected for you, so your feet don't have to keep pushing on the pedals to stop the nose from drifting left or right.

Full Definition

An adjustable trim system that applies a steady corrective input to the rudder, relieving the pilot of having to hold continuous rudder pressure to keep the airplane flying straight. It is typically used to offset yaw caused by engine torque, propeller effects, or asymmetric thrust.

Context Anchor

Seen in trim control discussions and used in flight when the airplane needs steady rudder pressure, such as during climb, , or changes.