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.

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...

Test your knowledge

Think you understand Windmilling? Challenge yourself with practice questions covering engines and all other ATPL subjects.

Start a Practice Quiz

Or browse all questions by subject