Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

2. MY PPL THEORY > Basic Theory of Flight > Flashcards

Basic Theory of Flight Flashcards

1
Q

What are the factors affecting lift?

A

Velocity, surface area, shape of airfoil, and angle of attack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How does the angle of attack affect lift?

A

The greater the angle of attack, the more air displaced. With a greater angle of attack, the air has farther to go over the top of the airfoil. This increases the camber of the airfoil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does the shape of airfoil affect lift?

A

The more camber an airfoil has, the faster the air moves over the top part and the less pressure the air has, so the greater the lift

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 4 airfoils on an aircraft?

A

Rudder, wings, elevators, propeller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a venturi?

A

A system for forcing the acceleration of air by constricting it in a cone shaped tube. In the constriction the velocity increases and the pressure decreases.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the term used to express the curve of the wing?

A

Camber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the angle of attack?

A

The acute angle between the chord line of the wing and relative wind. It affects the lift and drag of an aircraft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How can pilots increase lift?

A

Fly faster, change the camber of the airfoil, change the surface area, change of angle of attack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do ailerons work aerodynamically?

A

They change both the camber and angle of attack, which changes lift

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In which direction does lift act?

A

Perpendicular to the relative flow and perpendicular to the span of the airfoil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In which direction does the elevator create lift?

A

On the underside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In which direction does the rudder produce lift when flying?

A

To the side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the four forces acting on an aircraft in flight?

A

Lift, weight, thrust, drag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In which direction does weight act?

A

Towards the centre of the earth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is thrust?

A

Force that propels the aircraft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the sources of thrust?

A

Propellers, jet engines, turboprops

17
Q

What is drag?

A

Resistance to forward motion

18
Q

In which direction does drag act?

A

Parallel and opposite to the aircraft’s direction of travel

19
Q

How does velocity affect parasitic drag and induced drag?

A

Parasitic drag increases with velocity, induced drag decreases with velocity

20
Q

What is form drag?

A

A type of drag that is dependent on the shape of the aircraft

21
Q

How does the shape of an aircraft affect form drag?

A

Bodies with a larger cross section will have higher form drag than bodies with a thinner cross section

22
Q

What is skin friction drag?

A

A type of drag that arises from the friction of air against the surface of the aircraft

23
Q

What is interference drag?

A

A type of drag generated by the mixing of airflow streamlines between different aircraft components (e.g the wing and the fuselage)

24
Q

What is induced drag?

A

A type of drag that is the by product of lift. It is created by the interference between air on the top and bottom of an airfoil

25
Q

What are wingtip vorticies?

A

Circular patterns of rotating air left behind a wing as it generates lift

26
Q

What factors affect the intensity of wingtip vorticies?

A

Aircraft size, speed, and wing flap & landing gear configuration

27
Q

Where is the best place to touch down when landing behind an aircraft which has just taken off?

A

Prior to the point where the large aircraft took off

28
Q

Where is the best place to touch down when landing behind a large aircraft that just landed?

A

Beyond the point where the large aircraft touched down

29
Q

What is minimum drag?

A

The point of intersection of induced drag and parasitic drag

30
Q

Through which point can all the lift on an airfoil be said to be acting?

A

Centre of pressure

31
Q

What are the various forms of parasitic drag?

A

Interference drag, skin friction drag, form drag

32
Q

What is downwash?

A

When air is deflected downward by the underside of the wing

33
Q

In which direction is wind deflected off the wing?

A

Downward

34
Q

How does Newton’s Third Law affect flying?

A

When air is deflected downward by the underside of the wing, the wing is pushed up by a counter force (lift) equal to the force it took to deflect the air downward

35
Q

Which parts of an aircraft can be used to change the camber of an airfoil?

A

Ailerons, flaps, elevator, rudder

36
Q

Which part of an aircraft can be used to change the surface area?

A

Fowler flaps

37
Q

Which parts of an aircraft can be used to change the angle of attack?

A

Elevator, flaps, rudder, ailerons

2. MY PPL THEORY (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions