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Ground School > Theory Of Flight > Flashcards

Theory Of Flight Flashcards

0
Q

What axis is wingtip to wingtip

A

Lateral

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1
Q

Where is the longitudinal axis?

A

Nose to rudder

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2
Q

What is the vertical/normal axis

A

Passes through centre of gravity

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3
Q

What do ailerons control?

A

Roll.

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4
Q

When one aileron goes up, what happens to the other?

A

It goes down

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5
Q

What do elevators control?

A

Pitch

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6
Q

What control system acts similarly to the elevators, but consists of a single horizontal moving surface?

A

Stabilator

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7
Q

What controls Yaw?

A

Rudder.

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8
Q

What axis is roll around?

A

The longitudinal axis

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9
Q

What movement is associated with the normal axis

A

Yaw

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10
Q

What does a trim tab do?

A

Helps pilot maintain a constant altitude.

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11
Q

Where is the trim tab located?

A

The trailing edge of a control surface

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12
Q

What do spoilers do to lift and drag?

A

Reduce lift

Increase drag

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13
Q

What do dive brakes do?

A

Increase drag

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14
Q

What is flutter

A

Vibrations produced at high speeds

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15
Q

What is an aircraft?

A

Any machine capable of producing lift

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16
Q

What is an airplane

A

Power driven aircraft producing it’s lift through fixed wings during flight

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17
Q

What is a glider?

A

A non powered aircraft producing it’s lift from fixed wings (low aspect ratio)

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18
Q

What is an airframe?

A

Total structure of the body of an airplane

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19
Q

What is the fuselage?

A

Central body of an airplane to accommodate crew passengers etc

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20
Q

What is a monoplane?

A

One set of wings

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21
Q

What is a biplane?

A

Airplane with two sets of wings

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22
Q

What is leading edge?

A

Foreword edge if wing where airflow passes

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23
Q

What is the trailing edge?

A

Rear edge of the wing

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24
Q

What is wing root?

A

Where the wing attaches to the fuselage?

25
Q

What is wingtip?

A

The furthest edge of the wing from the fuselage

26
Q

What are spars?

A

Beams supporting wings from root to wingtip

27
Q

What is the fin/vertical stabilizer?

A

A vertical surface at the end of the fuselage to provide stability

28
Q

Define lift.

A

Force allowing the aircraft to be suspended in air

29
Q

Give 3 examples of things lift depends on.

A 
Angle of attack
Aerodynamic profile 
Surface area of wing 
True airspeed
Density of air
30
Q

List the two types of drag

A

Parasite

Induced

31
Q

Define parasite drag

A

Drag caused by all parts of the aircraft that do not produce life

No aerodynamic components

32
Q

Define drag

A

Resistance to motion through air

33
Q

Define induced drag

A

Caused by parts of the aircraft that produce lift.

Ex. Turbulent layer over wing

34
Q

Define angle of attack

A

Angle between chord line and relative airflow

35
Q

Define chord

A

Imaginary line joining leading and trailing edge of wing

36
Q

Define angle of incidence

A

Angle between chord and longitudinal axis. Constructed into the aircraft

37
Q

As angle of attack increases, what happens to lift?

A

It increases

38
Q

Name 2 ways to increase life

A

Increase angle of attack

Increase speed

39
Q

What is a stall

A

When the wings can no longer produce sufficient lift

40
Q

Name 3 symptoms of approaching a stall

A 
Loss of horizon 
Reduced wind noise 
Dropping of indicated airspeed 
Slack controls 
Buffering
41
Q

Name 3 factors of a stall

A 
Weight 
Centre of gravity 
Turbulence 
Turns 
Flaps 
Climatic condition
42
Q

How does a glider keep lift?

A

By keeping the nose slightly down

43
Q

What is equilibrium?

A

When thrust and drag are equal

44
Q

Where is the spar located in a conventional airfoil?

A

25%

45
Q

What happens to lift and drag in a conventional airfoil?

A

Increased lift and drag?

46
Q

What kind of aircraft does a conventional airfoil suit better?

A

Slow aircraft

47
Q

Where is the thickest part of a laminar airfoil located?

A

50%

48
Q

What happens to lift and drag with a laminar airfoil?

A

Both decease

49
Q

What kind of aircraft are better suited for a laminar airfoil?

A

High speed aircraft

50
Q

What is relative airflow?

A

Air flowing opposite,

But parallel to the direction of travel

51
Q

What is camber?

A

The curve of a wing

52
Q

What is span?

A

The maximum distance between wingtips

53
Q

What is aspect ratio?

A

Ration between length of wingspan and chord.

54
Q

What kinds of aircraft are high aspect ratio used on?

A

Gliders. Produces more lift and less drag

55
Q

What kind of aircraft use low aspect ratio?

A

High speed aircraft

56
Q

What is the laminar layer?

A

Smith air flowing over wing

57
Q

What is turbulent layer?

A

Air that becomes turbulent over the wing.

58
Q

What is the transition point?

A

Where the laminar layer becomes turbulent

59
Q

What is the separation point?

A

Where the turbulent layer separates from the wing creating a vacuum

60
Q

What is the effect of angle of attack on laminar airflow?

A

As angle of attack increases, transition point moves forward

Ground School (3 decks)

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