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← ScienceWhich outcome results during rapid airfoil stall when the pressure gradient requirement breaks?
A)Increased parasite drag coefficient occurs✓
B)Maximum lift generation efficiency increases
C)Reynolds number exceeds design limit
D)Boundary layer maintains laminar flow
💡 Explanation
When rapid airfoil stall forces adverse pressure gradients beyond limits, flow separation increases drag because the adverse pressure gradient mechanism disrupts laminar flow; therefore parasite drag massively increases, rather than efficient laminar flow.
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