EASA Module 17 Practice Questions - EASA Part-66 Module 17 - Propeller Exam

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For a fixed-pitch propeller, what happens to the angle of attack of the blade sections as the aircraft's forward (true) airspeed increases at a constant engine RPM?

The angle of attack increases because the relative airflow becomes more axial The angle of attack remains constant because RPM is unchanged The angle of attack decreases because the forward velocity vector increases the helix angle of the relative airflow The angle of attack reverses, producing negative thrust

Correct Answer:

The angle of attack decreases because the forward velocity vector increases the helix angle of the relative airflow

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