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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
What does the left rudder do?
Nose left attitude
26
What does the right rudder do?
Nose right attitude
27
What prevents rudder stabiliser overload?
Rudder limiter system
28
What is full rudder travel?
30 degree - 150 knots
29
What is intermediate travel?
15 degrees- 150-200 knots
30
What is a minimum travel?
5.7 degrees - 200 and above knots
31
Where is the ruddervator used and what are the functions?
Used on v-tail aircraft Both surfaces move simultaneously- elevator function One surface up/ one surface down - rudder function
32
Advantages and disadvantages of ruddervators?
Adv- weight saving/ no vertical stabiliser Dis Adv- complicated adjustment / no full rudder or elevator deflection
33
Feature of a delta aircraft?
Wingless
34
What is a Elevon?
Combination of elevator and aileron
35
What are secondary flight controls?
Lift devices Drag devices Trim devices
36
2 types of lift devices ?
Leading edge (Slats) Trailing edge (Flaps)
37
What does flap extension do?
Wing area increase which causes wing camber to change
38
What are drag devices?
Speed brakes ( air breaks) - Used in areas with high loads Spoilers
39
What flap gives the most lift?
Fowler flap - 95%
40
2 methods of boundary layer control?
Wing fences and saw tooth leading edge
41
How does a wing fence work and saw tooth leading edge ?
Reduces effect of spanwise flow Keeps air particles in a straight line
42
What is a vortex generator and how does it work?
Improves boundary layer control Takes high energy air from outside boundary layer —> Mix it with low energy air inside boundary layer
43
what are secondary lift devices
leading edge slats and trailing edge flaps
44
when are secondary lift devices used
Increase lift at low speed flight
45
Lift increase in slat
35%
46
Two drag devices
Spoilers and Air Brakes
47
what drag increases due to vortex generators
Induced Drag
48
what are trim systems used for
compensate for imbalance
49
3 types of balance system
balance tab, anti-balance tab , balance panel
50
where is balance panel fitted
leading edge of control surface
51
advantage of anti balance
increase efficiency of control surface
52
disadvantage of anti balance
requires more effort to deflect

M11 Aircraft Systems (23 decks)

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