Lift

Question 1

What is lift?

Answer 1

Phenomenon generated by an aerofoil due to pressure differences above and below the aerofoil.
The aerofoil is cambered on top and flat below, causing a difference in speed and thus a pressure differential

Question 2

What is the equation for lift?

Answer 2

Lift = 1/2 Air Density x the Velocity squared x Wing Area x Co-efficient of lift

Question 3

What is the co-efficient of lift?

Answer 3

Lifting ability of a particular wing, it depends on shape and angle of attack

Question 4

Describe the centre of pressure?

Answer 4

Single point acting on a wing chord line at right angle to relative force, where the lifting force is produced

Question 5

What happens with the centre of pressure with movement of AoA?

Answer 5

It moves, the greater the AoA, the closer the centre of pressure is to the leading edge

Question 6

Describe Aspect Ratio?

Answer 6

Ratio of the wings span to the geometric chord

Question 7

What are the high lift devices?

Answer 7

Trailing Edge Flaps (Fowler Flaps)
Leading Edge Flaps (Krueger Flaps/ Slats)
Slots

Question 8

What do slotsdo to increase lift?

Answer 8

Delay separation of the boundary layer by re-energising the airflow

Question 9

What do Leading Edge Flaps do to increase lift?

Answer 9

Increase lift by creating a longer chord line, camber, and area