Lift Augmentation

Question 1

What are 3 key purposes of flaps

Answer 1

1. Increased lift at slower speeds
2. Increased drag for better control during landing
3. Lower nose attitude during landing

Question 2

What happens to lateral roll stability when flaps are deployed

Answer 2

REDUCED / DECREASED

Less stability

Question 3

On take off and climb out

What effects does small amount of flaps have on performance

Answer 3

Shorter take off run
reduced rate of climb

Question 4

What effects does a large amount of flaps have in general

Answer 4

Lower nose attitude
Increased drag
Significantly reduced climb out ability

Question 5

What is asymmetric flap

Answer 5

When one flap is extended and the other is not

Could be due to extension or retraction failure

Question 6

What are the 4 flap types

Answer 6

1. Simple
2. Split
3. Slotted
4. Fowler

Review here

Question 7

What effect do slots and slats have when used

Answer 7

• Provide continuation of air flow to upper wing surface
• Delay air flow separation

Question 8

What are 2 types of leading edge devices

Answer 8

1. Slots
2. Slats

Question 9

What are 3 settings of a leading edge slat

Answer 9

Fixed
Permanently in position
Manual
Moved under control of pilot
Automatic
Slats can be locked and unlocked by pilot and use aerodynamic forces to deploy themselves

Question 10

What effect do spoilers have

Answer 10

Encourage airflow separation
Drastically reduce lift

Sometimes referred to as “lift dumpers”

Question 11

What are 3 typical locations of air brakes

Answer 11

1. Upper wing surface
2. Rear fuselage
3. Tail

Question 12

For a given speed (without additional thrust) what can be done to achieve more lift without increasing the AoA

Answer 12

DEPLOY INITIAL FLAPS

Increases the Camber. Camber is an element of CL in the lift formula
If all other components are a constant, lift is maintained, and AoA does not change, Camber is the only element that ensures more lift