What is the function of the turn coordinator?

The turn coordinator is designed to indicate the aircraft's rate of turn and its coordination during that turn. It provides critical information to the pilot regarding how quickly the aircraft is turning, typically displayed in degrees per second. Additionally, it shows whether the turn is coordinated, which means that the aircraft is balanced correctly in the turn, without a tendency to skid or stall. This is important for maintaining control and ensuring a safe and efficient flight path.

While other instruments serve specific purposes like measuring speed, altitude, or vertical speed, the turn coordinator's unique role focuses on ensuring precision in turning maneuvers and helping the pilot maintain the correct bank angle and turn rate, which contributes to the overall safety and performance of the aircraft during flight.