Discussion
Consider the following statements about the flexural axis:
1. It is the locus of the section shear centres.
2. A load applied along it bends the wing without twisting it.
3. It always coincides with the line of aerodynamic centres.
Which of the statements given above is or are correct?
Answer: A
The first two are correct. The third is false and structurally important: the offset between the flexural axis and the aerodynamic centre is precisely what determines whether increasing lift twists the wing nose-up, which is the mechanism of divergence.
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