Engines

Windmilling

Definition

The continued rotation of a failed engine propeller or fan driven by airflow. Windmilling creates significant drag that must be eliminated by feathering the propeller or shutting down the engine.

Why Windmilling Matters for Pilots

Understanding Windmilling is important for pilot certification exams and safe flight operations. This concept appears on FAA and EASA knowledge tests, and examiners may ask about it during oral checkrides. A thorough understanding of Windmilling helps you make better decisions in the cockpit.

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Exam Tip

This concept is commonly tested in engines-related questions on FAA and EASA exams. Make sure you can explain Windmilling in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.

Related Terms

Feathering

Rotating propeller blades to a nearly streamlined position (edge into the wind) ...

Engine Failure

The partial or complete loss of engine power during flight. Single-engine proced...

Drag

The aerodynamic force opposing the motion of an aircraft through the air. Drag h...

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