Airfoils

Question 1

Maximum thickness of an airfoil is usually found

Answer 1

25% aft of the leading edge.

Question 2

Maximum Camber is the

Answer 2

Center of Lift

Question 3

What is Wing Area (S)

Answer 3

The plan surface area, which includes the area covered by the fuselage.

Question 4

What is wing span? (b)

Answer 4

the distance from wing tip to wing tip

Question 5

What is washout?

Answer 5

Forward twisting of the wing tips, allowing the roots to stall but save aileron authority.

(root is at a high angle of attack, but with the twisting the ends of the wing are at a lower angle of attack, below the Critical AOA)

Question 6

What is average chord?

Answer 6

The geometric average.

S/b = Cav

Question 7

What is aspect ratio?

Answer 7

The Wing Span (b) divided by the average chord.

b/Cav