InstrumentsGyroscopic Instruments

Turn Coordinator

The turn coordinator is a gyroscopic instrument that indicates the rate of turn and roll, providing guidance to establish standard rate turns. It includes an inclinometer (slip indicator ball) to show whether a turn is balanced. It is often electrically driven, providing redundancy if the vacuum-driven artificial horizon fails.

Key Points

  • •Indicates <strong>rate of turn</strong>, not a specific bank angle.
  • •Often electrically driven to provide redundancy if the vacuum-driven artificial horizon fails.
  • •Includes a ball (inclinometer) to indicate <strong>slipping or skidding</strong> turns.
  • •A standard rate turn is <strong>3° per second</strong>, resulting in a 360° turn in 2 minutes.

Exam Relevance

Students must distinguish between the turn coordinator and artificial horizon, particularly regarding power sources and failure indications.

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Turn Coordinator | The Pilot Exam