Discussion
Match each contribution in List I with its effect in List II.
List I
A. Geometric dihedral
B. Wing sweep
C. High wing position
D. Anhedral
List II
1. Raises the lower wing's incidence in sideslip
2. Gives the leading wing more lift, growing with lift coefficient
3. Adds through fuselage interference in sideslip
4. Reduces an excessive total
Select the correct match.
Answer: B
Correct answer: A-1, B-2, C-3, D-4
Each contribution works by a different mechanism. Geometric dihedral raises the lower wing's incidence in a sideslip. Sweep gives the leading wing a lower effective sweep and so more lift, an effect that grows with lift coefficient. A high wing gains from the flow the fuselage deflects around it.
Anhedral is the odd one out, and the only one that subtracts: it exists to reduce a total the other three have made excessive. Reading for the negative contribution first settles that pairing at once.
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