POF - Lift

Question 1

What two components is the total reaction made up from?

Answer 1

1. Lift Force

2. Drag Force

Question 2

What is the formula for Lift?

Answer 2

Lift = 1/2•rho•V^2•S•CL

Question 3

What are the three main factors that affect the co-efficient of lift?

Answer 3

C: Camber
A: Angle of Attack
T: Thickness

Question 4

What effects take place when the thickness for the aerofoil increases?

Answer 4

1. Lifting ability is much higher for a thicker aerofoil.
2. The stalling angle of attack increases.
3. The rate at which the lift increases is approximately the same for a less thick/thick aerofoil.

Question 5

The effects of a cambered aerofoil compared to a symmetrical aerofoil in relation to the co-efficient of Lift

Answer 5

1. The stalling angle remains in the same region
2. The rate at which CL increases with the angle of attack is approximately the same.
3. The zero lift angle of attack is negative for a cambered aerofoil.

Question 6

What happens to CL when flaps extend?

Answer 6

CL increases