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Theory Of Flight > Exam Qs > Flashcards

Exam Qs Flashcards

1
Q

Define angle of incident?

A

Chord line and fuselage reference datum

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2
Q

Which Newton’s law describes function of jet engine?

A

3rd

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3
Q

Bernoulli states

A

When dynamic pressure increases static pressure decreases.

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4
Q

Angle of incidence also known as

A

Rigging angle

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5
Q

Angle of attack is between

A

Chord line and relative airflow

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6
Q

Which airfoil should create more lift at the same speed?

A

Cambered

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7
Q

In forces acting on an airfoil where is the total reaction assumed to act from?

A

Pressure?

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8
Q

To generate the same amount of lift as altitude is increased, an airplane will be flown at?

A

A higher true airspeed for any given angle of attack.

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9
Q

Aspect ratio is expressed as?

A

Wing span over mean chord

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10
Q

The axis around which an aircraft rolls is called?

A

Longitudinal

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11
Q

On a graph which line is the highest aspect ratio?

A

The highest

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12
Q

Taper is?

A

Reduction on chord length from wing root to tip

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13
Q

Decrease in rigging angle from root to tip is called?

A

Washout

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14
Q

What has higher aspect ratio, glider or F35

A

Glider

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15
Q

When does airflow turn from laminar to turbulent?

A

Transition point

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16
Q

Lift is only perpendicular to the chord line in level flight. True or false?

A

False?

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17
Q

The rho symbol (p) best describes what?

A

Density

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18
Q

Induced drag is lower on a/c that carry wing tip tanks or ECM pods?

A

True

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19
Q

Interference drag is mainly reduced by?

A

Fairings & internal stowage

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20
Q

Reduced airflow over the wing can lead to?

A

The a/c to stall

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21
Q

If AoA is constant but airspeed is doubled, the lift produced at the higher speed will be…

A

4 times greater than at the lower speed

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22
Q

Drag is opposite to?

A

Thrust

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23
Q

Lift acts perpendicular to the relative airflow… and drag acts parallel and opposite to …flight path

A

Relative airflow, flight path

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24
Q

Form drag is mainly reduced by?

A

Streamlining

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25
Q

In rudder or elevator what enhances manoeuvrability?

A

Size, p, airspeed, deflection angle

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26
Q

Zero lift drag is the combination of…

A

Form, interference, surface friction drag

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27
Q

4 methods to reduce wing tip vortices

A

Winglets, taper, higher aspect ratio, washout

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28
Q

Lift dependent drag is lowest at a speed … than VMD

A

Higher

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29
Q

Lift dependant drag is made up of increments of zero lift drag and also induced… drag

A

Induced

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30
Q

Strong wing tip vortices can form due to an increase in…

A

Weight, AoA, chord length

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31
Q

As speed decreases in level flight below the speed for best lift/drag ratio, the total drag of a plane will…

A

Increase because of increased induced drag.

32
Q

Which AoA gives best lift/drag ratio for a general purpose aircraft?

A

4

33
Q

Washout is used to reduce wing tip stalling and…?

A

Vortex drag

34
Q

Pitching is movement around which axis?

A

Lateral

35
Q

Lowering flaps will also lower the critical angle?

A

True

36
Q

Lowering flaps will also lower critical angle?

A

True

37
Q

Further affect of roll is?

A

Yaw

38
Q

When lowering slats lift will increase. Why else is true?

A

Allows higher critical angle
Improves low speed handling
Improves airflow in boundary layer

39
Q

Slats or slots are usually located in front of the what?

A

Aileron

40
Q

Trim tabs work by being deflected in the … opposite … direction as the corresponding control surface is deflected.

A

Opposite

41
Q

What aids trim but can’t be adjusted from outside the cockpit?

A

Fixed tabs

42
Q

Highly manoeuvrable a/c require heavy stick forces to protect it from being over stressed by the pilot?

A

False

43
Q

Climbing for obstacle clearance is best achieved at…

A

Lower speed and excess thrust

44
Q

To maintain altitude during a turn, the angle of attack must be increased to compensate for the decrease in the…

A

Vertical component of lift

45
Q

A max rate climb depends on …

A

Power

46
Q

Absolute ceiling is reached when?

A

Engine power and thrust can’t deliver a sustainable climb rate

47
Q

A …tail… wind will increase your gliding range

A

Tail

48
Q

Which speed would give you the best gliding range?

A

VxIMD

49
Q

3500ft, decent at 240kts etc etc

A

60nm

50
Q

An increase in power will …reduce… the decent angle, …increases… the distance travelled over the ground and as such …increase… the range from a given altitude.

A

Reduces, increases, increase

51
Q

Max turning performance achieved

A 
Near sea level
At the light buffet
With minimum wing loading
With maximum power/thrust
Max permissible g loading
52
Q

If airspeed is increased from 120-150kts during a level 60 degree banked turn, the load factor will…

A

Remain the same but the radius of turn will increase

53
Q

A plane will stall at the same…

A

Angle of attack regardless of the attitude with relation to the horizon

54
Q

Lowering flaps will …decrease… the stalling speed and …decrease… the critical angle of attack

A

Decrease decrease

55
Q

If the a/c radius of turn is 1500’ at 120kts, what would the radius of turn be if TAS increased to 240kts?

A

6000’

56
Q

The basic stall speed is the speed for an aircraft …weight…, throttle closed, flaps up, level flight.

A

Weight, closed, up, level

57
Q

Stalling speed at 4g does what?

A

Doubles

58
Q

A reduction in weight requires less lift and subsequently the stall speed will increase

A

Weight, stall, increase

59
Q

Which stability requires little input from the pilot to recover to previous flight condition?

A

Positive

60
Q

The motion of a damped phugoid dynamic looks like?

A

A wave with reducing amplitudes

61
Q

Lateral stability is achieved by the following design features?

A

Large fin, dihedral, high wing, sweep back

62
Q

Longitudinal stability deals with roll, true or false?

A

False

63
Q

Range endurance flying in a turbo prop is based on VIMD?

A

True

64
Q

Range flying benefits from flying high, cold, increased IAS?

A

False

65
Q

Flying for range we consider what equation?

A

VIMD x 1.32

66
Q

When flying for max range consider?

A

Optimum rpm

67
Q

Why demand higher RPM when flying for range?

A

Reducing density when flying higher

68
Q

When flying for endurance you want to fly near the tropopause for cold air?

A

False

69
Q

What option does a multi engine a/c have to operate at lower levels?

A

Shut down engines to force other to run at higher RPMs

70
Q

For takeoff and landing consider?

A

Flight path and obstacles
Runway length
Temp
Flap setting

71
Q

Can boundary control methods augment lift?

A

True

72
Q

Slats and slots allow for better manoeuvrability by mainly…?

A

Adding extra energy across the chord length

73
Q

Flaps when extended …decrease… the stall speed and …decrease… the critical angle

A

Decrease, decrease

74
Q

Why is a propeller blade twisted?

A

To maintain an efficient AoA along the blade length

75
Q

Increasing number of propellor blades is called?

A

Solidity

76
Q

In a constant speed propeller fine pitch can be described as …low gear… and is best for …takeoff and climb…

A

Low gear, take off and climb

77
Q

A reduction in weight will require less lift and subsequently the landing speed will increase

A

Weight, landing, decrease

Theory Of Flight (10 decks)

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