Aerodynamics

Question 0

When an aircraft is rolled, what force is inclined?

Answer 0

Lift

Question 1

Lift is always perpendicular to the direction of what?

Answer 1

Relative airflow

Question 2

During a roll, the aircraft is pulled sideways. What is the name for this effect and what is the cause?

Answer 2

Sideslip resulting from the lift being inclined to one side.

Question 3

What is the secondary effect of a roll and why?

Answer 3

Yaw due to loss of lift resulting in sideslipping which pushes the tail sideways into the air

Question 4

What is the primary effect of using rudder?

Answer 4

Yaw

Question 5

What is the secondary effect of applying rudder and why?

Answer 5

Roll because the rudder creates a yaw that increases relative airflow over the wing on the outer side of the turn.

Question 6

What is the term used to specify the degree of cross sectional curvature of a wing.

Answer 6

Camber

Question 7

What is the typical critical angle (in degrees)?

Answer 7

15 to 16

Question 8

What is the name of the type of drag that is greatest at low IAS?

Answer 8

Induced drag

Question 9

The trim control is used to provide what?

Answer 9

Aerodynamic balance

Question 10

Flutter of control surfaces is prevented by what?

Answer 10

A mass balance that brings centre of mass of the control surface closer to the hinge.

Question 11

During takeoff, should flaps be used?

Answer 11

Flaps are used according to manufacturer specifications

Question 12

What is Vx used to represent and what is the value in a Jabiru J160?

Answer 12

Speed of climb in a max angle climb -60Kts

Question 13

In a Jabiru J160, what is Vy (max rate climb speed) in Kts?

Answer 13

80

Question 14

What does VSI stand for?

Answer 14

Vertical speed indicator

Question 15

Performance is determined by what and what?

Answer 15

Power and Attitude

Question 16

Lift divided by weight is called what?

Answer 16

Load factor

Question 17

Stall speed increases by what function of an increased load factor?

Answer 17

The Square root

Question 18

In a level flight bank, what happens to the load?

Answer 18

Lift has to increase to compensate for being inclined so that the load factor also increases

Question 19

Turn performance is related to what and what?

Answer 19

Angle of bank and IAS

Question 20

The lift equation ( CL . 1/2 . Density . V^2 . S ). CL is related to what two properties?

Answer 20

Angle of attack and camber

Question 21

A slipping right turn (analogous to understeer in a car) causes the balance ball to drift to which side?

Answer 21

Right

Question 22

A skidding turn (analogous to oversteer in a car) sees the balance ball pushed to which side of the turn? (Outside or inside)

Answer 22

Outside

Question 23

If the aircraft is skidding when turning should more or less rudder be applied?

Answer 23

Less

Question 24

If an aircraft is carrying luggage that has been stowed such that shifts the centre of gravity to the aft, will the stalling speed increase or decrease?

Answer 24

Increase

Question 25

What happens to the angle of attack when a wing encounters a thermal updraft?

Answer 25

It increases as the air is approaching the aircraft from below

Question 26

If one wing stalls, it may cause the aircraft to roll. The downwards motion of that wing relative to the air increases its angle of attack. What is the term for effect this has on the stall?

Answer 26

Aggravating the stall

Question 27

Why should ailerons never be used in a stall?

Answer 27

They increase the drag

Question 28

What control input is used in a stall?

Answer 28

Rudder

Question 29

What is the correct response to a spin?

Answer 29

Throttle to idle, apply opposite rudder, lower the nose, apply full power to recover lost altitude

Question 30

How can a pilot distinguish between a spiral dive and a spin?

Answer 30

If the indicated airspeed is low, the aircraft is in a spin. If it's high, the aircraft is in a spiral dive.

Question 31

A dynamic accelerated stall is also known as a what? Why might this occur?

Answer 31

High speed stall. Beyond the critical angle a stall will occur regardless of speed.

Question 32

Beyond the critical angle, is there a speed that can prevent a stall

Answer 32

No

Question 33

With a faster airspeed the radius of a turn is what

Answer 33

Increased

Question 34

What is worst for a small aircraft when a nearby larger aircraft is flying slowly, taking off or landing or is flying on a clam day?

Answer 34

Wake turbulence

Question 35

When taking off after a larger aircraft, you should lift off where (relative to the larger aircraft's liftoff point)

Answer 35

Before

Question 36

To avoid wake during a landing after a larger plane, where should the pilot of a small aircraft aim?

Answer 36

Beyond the larger aircraft's touchdown point.

Question 37

What is the term for the ratio of the span of a wing to its chord?

Answer 37

Aspect ratio

Question 38

During a takeoff run, slipstream, torque and gyroscopic effect combine to cause the aircraft to tend to do what?

Answer 38

Yaw to the left

Question 39

Why is the tail raised in a tail wheel aircraft during the takeoff roll?

Answer 39

To get clear air over the rudder

Question 40

In most aircraft, which is further aft, the centre of pressure (CoP) or the centre of gravity (CoG)?

Answer 40

CoP

Question 41

The location of the centres of pressure and gravity usually cause a nose down tendency which is countered by the placement of what above what?

Answer 41

Drag above thrust

Question 42

Takeoff performance is measured in terms of what?

Answer 42

Distance required for takeoff

Question 43

IAS measures the what of the air?

Answer 43

Dynamic pressure

Question 44

Is true airspeed greater than or less than Indicated airspeed?

Answer 44

Greater

Question 45

Wind from 45 degrees to the left and rear is a what sort of tailwind?

Answer 45

Left quartering

Question 46

What aileron and stick control is used to counter a right quartering tailwind?

Answer 46

Left aileron and forward stick

Question 47

Trim is adjusted to hold a constant what?

Answer 47

Pitch

Question 48

What two factors determine the size of a moment?

Answer 48

Force and distance

Question 49

Is lift reduced during a roll?

Answer 49

No but it is inclined so that its verticle component is reduced

Question 50

What is the lift equation?

Answer 50

Lift = CL . 1/2 . Density . V^2 . S

Question 51

In the lift equation, what is S

Answer 51

Wing surface area

Question 52

The equivalent of understeer in a car is a what sort of aircraft turn?

Answer 52

Slipping

Question 53

During a turn, if the aircraft yaws too much, the turn is called what?

Answer 53

Skidding turn

Question 54

What does Vy stand for?

Answer 54

Max rate climb speed

Question 55

How is load factor defined

Answer 55

Lift/weight

Question 56

How does load factor impact on stall speed?

Answer 56

As load factor increases, stall speed increases by its square root

Question 57

How does a thermal updraft impact on the likelihood of a stall?

Answer 57

The updraft increases the angle of attack as air is now rising. This increases the risk of a stall and may also be uneven, causing one wing to stall, resulting in a potential spin.

Question 58

Flaps allow a pilot to take a descent path that is what?

Answer 58

Steeper

Question 59

How does aspect ratio relate to drag?

Answer 59

High aspect ratios are associated with lower induced drag (think of glider wings)

Question 60

Which of the following is caused by propeller slipstream? | Yaw, Roll or Pitch?

Answer 60

Yaw

Question 61

What is the correct response in a spiral dive?

Answer 61

Opposite aileron to level the wings

Question 62

When pressure height is less than elevation, what can you say anout QNH?

Answer 62

It is more than 1013mb

Question 63

In a steady climb what can you say about thrust, drag, weight and lift?

Answer 63

The lift is less than weight as the AoA means thrust has to exceed drag and the excess combines with lift to overcome weight.

Question 64

Under the recency rules, to carry passengers, what mut an RPL holder have done?

Answer 64

Conducted 3 takeoffs and landings in the past 90 days

Question 65

As a student pilot if you cannot fly for 6 weeks who can certify you to recommence flying?

Answer 65

Your DAME

Question 66

What are ASI, AH, DG and T&P?

Answer 66

Airpeed indicator Artificial Horizon Directional Gyro Turn and Balance indicator

Question 67

What are the gyro instruments?

Answer 67

DG AH T&B

Question 68

Attitude indicator is otherwise known as what?

Answer 68

AH

Question 69

Does a failure of the suction system affect the DG?

Answer 69

Yes - the gyro is suction driven and the DG relies on the gyro.

Question 70

What are the pressure instruments?

Answer 70

Airspeed indicator Altimeter VSI

Question 71

What angle of attack gives least drag?

Answer 71

4 degrees

Question 72

A TAF indicates wind direction from true or magnetic?

Answer 72

True

Question 73

On a bravo loading chart, the climb weight limit must be condidered. Why?

Answer 73

You may need to use that rather than the takeoff weight limit.

Question 74

In a climb is weight greater than, equal to or less than lift?

Answer 74

Greater

Question 75

What is the name for the maximum speed at which full deflection of a control surface will not stress the airframe?

Answer 75

Manoeuvre speed

Question 76

Which primary controls are more effective with greater airspeed?

Answer 76

All three

Question 77

What is the formula for load factor increase in a bank?

Answer 77

(Original load factor)/cos(angle)

Question 78

How much is the stall speed increased in a 30, 45, 60, 75 degree bank?

Answer 78

7%, 20%, 40%, 100%

Question 79

How does the stall IAS vary with altitude?

Answer 79

It doesn't

Question 80

How does an increased AoA affect centre of pressure?

Answer 80

It is shifted forward

Question 81

How can you approximate glide range?

Answer 81

Lift:drag ratio x altitude

Question 82

A plane cannot enter a spin unless it is allowed to what?

Answer 82

Stall

Question 83

In an engine failure just after takeoff what is the first task?

Answer 83

Lower the nose to maintain speed

Question 84

How does an increased AoA affect centre of pressure?

Answer 84

It is shifted forward

Question 85

How can you approximate glide range?

Answer 85

Lift:drag ratio x altitude

Question 86

A plane cannot enter a spin unless it is allowed to what?

Answer 86

Stall

Question 87

In an engine failure just after takeoff what is the first task?

Answer 87

Lower the nose to maintain speed

Question 88

Runways are denoted by A) magnetic or B) true Direction?

Answer 88

A

Question 89

What causes an aggravated stall?

Answer 89

If one wing stalls it may fall, increasing its AoA. This can lead to a spiral dive

Question 90

What are two names for a stall that occurs when the IAS is high?

Answer 90

High speed stall | Dynamic accelerated stall

Question 91

What are conditions that can create the most likelihood of wake turbulence behind a large aircraft?

Answer 91

When it takes off or lands or flies slowly on a calm day