aerodynamicsFAA-published sample question (ATM, Aug 2021)
What effect does extending leading edge slats have on an airplane's wing?
A
Increases the pitch up moment of an airfoil.
B
Increases the camber and CL-MAX.✓ Correct Answer
C
Allows for earlier airflow separation.
Explanation
Leading-edge slats increase the effective camber of the wing and direct high-energy air over the upper surface, delaying separation so the wing reaches a higher maximum lift coefficient (CL-MAX) at a higher angle of attack. They delay, not hasten, airflow separation.
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