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M11 Aircraft Systems > 11.1 > Flashcards

11.1 Flashcards

1
Q

What are the three axes of motion

A
  1. Lateral
  2. Longitudinal
    3.vertical
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2
Q

What are the 3 motions of axes

A
  1. Pitch
  2. Yaw
  3. Roll
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3
Q

Vertical axis motion

A

Yaw - nose left nose nose right

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4
Q

Lateral axis motion

A

Pitch - nose up nose down

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5
Q

Longitudinal axis motion

A

Roll - wing up wing down

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6
Q

Primary flight controls

A

Ailerons , Elevators , Rudder

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7
Q

Vertical axis flight control

A

Rudder

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8
Q

Longitudinal axis flight control

A

Aileron

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9
Q

Lateral axis flight control

A

Elevator

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10
Q

Whats the purpose of secondary flight controls

A

Improve aircraft performance characteristics & relieve excessive control loading

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11
Q

What are the secondary flight controls

A

1.Flaps
2.slats
3.Flight Spoilers
4.Trim systems

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12
Q

Function of inboard ailerons

A

Low speed & high speed

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13
Q

Function of outboard ailerons

A

Low speed only , inactive in high speed

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14
Q

What are roll spoilers

A

Supplement ailerons on large aircraft, helps execute accurate turn

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15
Q

What are ailerons

A

Roll control along longitudinal axis , ailerons deflect in opposite directions

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16
Q

Function of elevators

A

Pitch control around lateral axis , move up and down simultaneously

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17
Q

What does up and down deflection do with elevators

A

Up - nose up attitude
Down - nose down attitude

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18
Q

Function of stabilator

A

Fully moveable horizontal stabiliser

Enhances manoeuvrability & reduces Mach tuck on high speed military aircraft

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19
Q

2 types of canard

A

Lifting & control

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20
Q

What does a canard do and where is it located

A

Provides longitudinal stability & control

Located on nose/foward fuselage

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21
Q

What is a lifting canard

A

Weight shared between canard & wing

Generates positive lift

22
Q

What does a control canard do

A

Used for pitch control , the weight is carried by the wing
Used normally at zero angle of attack

23
Q

Difference between lifting and control canard

A

Lifting shares weight between canard and wing , with control only the wing carries the weight

24
Q

What does the rudder do?

A

Yaw control around vertical axis

25
Q

What does the left rudder do?

A

Nose left attitude

26
Q

What does the right rudder do?

A

Nose right attitude

27
Q

What prevents rudder stabiliser overload?

A

Rudder limiter system

28
Q

What is full rudder travel?

A

30 degree - 150 knots

29
Q

What is intermediate travel?

A

15 degrees- 150-200 knots

30
Q

What is a minimum travel?

A

5.7 degrees - 200 and above knots

31
Q

Where is the ruddervator used and what are the functions?

A

Used on v-tail aircraft
Both surfaces move simultaneously- elevator function
One surface up/ one surface down - rudder function

32
Q

Advantages and disadvantages of ruddervators?

A

Adv- weight saving/ no vertical stabiliser
Dis Adv- complicated adjustment / no full rudder or elevator deflection

33
Q

Feature of a delta aircraft?

A

Wingless

34
Q

What is a Elevon?

A

Combination of elevator and aileron

35
Q

What are secondary flight controls?

A

Lift devices
Drag devices
Trim devices

36
Q

2 types of lift devices ?

A

Leading edge (Slats)
Trailing edge (Flaps)

37
Q

What does flap extension do?

A

Wing area increase which causes wing camber to change

38
Q

What are drag devices?

A

Speed brakes ( air breaks) - Used in areas with high loads
Spoilers

39
Q

What flap gives the most lift?

A

Fowler flap - 95%

40
Q

2 methods of boundary layer control?

A

Wing fences and saw tooth leading edge

41
Q

How does a wing fence work and saw tooth leading edge ?

A

Reduces effect of spanwise flow
Keeps air particles in a straight line

42
Q

What is a vortex generator and how does it work?

A

Improves boundary layer control
Takes high energy air from outside boundary layer —> Mix it with low energy air inside boundary layer

43
Q

what are secondary lift devices

A

leading edge slats and trailing edge flaps

44
Q

when are secondary lift devices used

A

Increase lift at low speed flight

45
Q

Lift increase in slat

A

35%

46
Q

Two drag devices

A

Spoilers and Air Brakes

47
Q

what drag increases due to vortex generators

A

Induced Drag

48
Q

what are trim systems used for

A

compensate for imbalance

49
Q

3 types of balance system

A

balance tab, anti-balance tab , balance panel

50
Q

where is balance panel fitted

A

leading edge of control surface

51
Q

advantage of anti balance

A

increase efficiency of control surface

52
Q

disadvantage of anti balance

A

requires more effort to deflect

M11 Aircraft Systems (23 decks)

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