Discussion
Match the airfoil feature in List I with its effect in List II.
List I
A. Camber
B. Thickness
C. Sharp trailing edge
D. Leading edge radius
List II
1. Fixes the point at which the Kutta condition applies
2. Shifts the zero-lift angle negative
3. Influences the type of stall the section shows
4. Affects the suction peak and the drag at zero lift
Select the correct match.
Answer: C
Camber sets the zero-lift angle, thickness governs the pressure distribution and hence the drag at zero lift, the sharp trailing edge is where the Kutta condition is applied, and the leading edge radius decides whether the section stalls from the leading or trailing edge.
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