11.

Task D:

D1:

D2:

D3:

D4:

Why the sectional lift coefficient C, is zero at the wing tip?

Why the sectional lift coefficient C₁ is almost "flat" near the mid-section of the

wing? What is the cause of C, distribution?

Do you think the C₂ distribution is elliptical? If not suggest ways to make it

elliptical.

Use a few data point to verify the induced drag formula.

(20 marks)