3D Flow

Question 1

Why do we want an elliptical lift distribution?

Answer 1

Creates favourable handling characteristics.

Question 2

What two things increase wingtip vortices?

Answer 2

Chord length and aircraft speed

Question 3

Why does tapering reduce wingtip vortices?

Answer 3

Reduces the amount of surface area the air has to come into contact with.

Question 4

True or false, wing tip vortices are stronger at higher speeds.

Answer 4

False.

Question 5

Why are trailing edge vortices stronger at the tip?

Answer 5

Greater pressure gradient.

Question 6

What occurs at CLMAX?

Answer 6

Stall.

Question 7

In 3D flow, the lift acts perpendicular to what airflow?

Answer 7

Effective airflow.

Question 8

What angle of attack determines the amount of induced drag?

Answer 8

Induced.

Question 9

What angle of attack determines lift?

Answer 9

Effective.