What does the turn coordinator primarily show during a flight operation?

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The turn coordinator is an essential instrument in aircraft for providing information about the aircraft's performance during turns. It primarily indicates the rate of turn and the roll rate, allowing pilots to maintain coordinated flight. The instrument displays the rate of turn in degrees per second and can assist in ensuring that the aircraft is making a standard rate turn, which is typically three degrees per second.

This is crucial for effective flight management, especially when navigating through controlled airspace or during instrument flight, as it helps prevent over-banking or excessive yaw. The roll rate indication allows the pilot to assess how quickly the aircraft is rolling into a turn, which is particularly helpful for maintaining control and stability.

In contrast, the other options—altitude, airspeed, and pitch attitude—are shown by different instruments: altimeters display altitude, airspeed indicators show the speed through the air, and artificial horizons or attitude indicators provide pitch and bank information. The turn coordinator's specialized function focuses solely on indicating the aircraft's turning behavior, making it an integral tool for managing turns effectively.

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