Final answer:
A turn coordinator utilizes a gyroscope and a ball-in-tube system to display the rate of turn and coordination of an aircraft's movements. It works based on the principle of gyroscopic precession. The axis of a turn coordinator is positioned in the longitudinal axis of the aircraft.
Step-by-step explanation:
A turn coordinator shows the rate of turn and the coordination of the aircraft's movements by using a ball-in-tube system in conjunction with a gyroscope.
Gyroscopic precession serves as the turn coordinator's primary working principle. The ball in the tube moves as a result of the gyroscope's spin axis tilting in the direction of the aircraft's turn.
By positioning its axis in the longitudinal axis of the aircraft, a turn coordinator effectively aligns itself with the direction of flight.