Which term describes a wing twist that increases the angle of incidence toward the wingtip?

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Multiple Choice

Which term describes a wing twist that increases the angle of incidence toward the wingtip?

Explanation:
Wing twist along the span shapes how lift and stall behave across the wing. Increasing the angle of incidence toward the wingtip means the tip has a higher local angle of attack than the root. This pattern is called wash-in. As the overall angle of attack rises, the tip reaches the critical angle first, so stall tends to begin at the wingtip rather than at the root. That contrasts with wash-out, which lowers the tip’s incidence so the root stalls first, and with dihedral or anhedral, which describe the wing’s vertical shape rather than a spanwise incidence twist.

Wing twist along the span shapes how lift and stall behave across the wing. Increasing the angle of incidence toward the wingtip means the tip has a higher local angle of attack than the root. This pattern is called wash-in. As the overall angle of attack rises, the tip reaches the critical angle first, so stall tends to begin at the wingtip rather than at the root. That contrasts with wash-out, which lowers the tip’s incidence so the root stalls first, and with dihedral or anhedral, which describe the wing’s vertical shape rather than a spanwise incidence twist.

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