Discussion
Arrange these spanwise stations in the order they stall on a well-designed tapered wing with washout:
1. Wing root
2. Inboard of mid-semi-span
3. Outboard of mid-semi-span
4. Wing tip
Select the correct sequence.
Answer: A
Correct answer: 1, 2, 3, 4
A well-designed wing stalls from the root outward. The root reaches its stalling angle first, the separation spreads progressively outboard, and the tip is the last to go - which keeps the ailerons in attached flow for as long as possible and produces a nose-down pitching moment as the inboard lift is lost. Washout and section variation along the span are the means; without them, taper alone would give exactly the reverse and dangerous order.
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