Discussion
Three of the following are consequences of wing sweep. Which is not?
A higher maximum lift coefficient
A higher drag-divergence Mach number
A tendency to stall at the tip first
A longer structural span
Answer: D
Correct answer: A higher maximum lift coefficient
Sweep reduces the maximum lift coefficient, since only the normal component of velocity is effective over the section and the spanwise flow thickens the outboard boundary layer. The other three do follow: the drag-divergence Mach number rises, the tip tends to stall first because of that spanwise drift, and the structural span along the swept axis is longer than the aerodynamic span, which adds weight.
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