Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

M11 > M11.1 > Flashcards

M11.1 Flashcards

(77 cards)

Start Studying
1
Q

What is also known as a primary control surface on large aircraft to help assist in roll

A

Roll spoilers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the two different kinds of canards

A

Lifting and control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an advantage of the V tail

A

Weight saving because no additional control surface is needed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the purpose of the slats and the flaps

A

Produce lift for low speed flight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is used to move the slats and the flaps

A

The flap lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Nose up/nose down around what axis

A

Lateral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Roll wing up and wing down around which axis

A

Longitudinal axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Yaw nose left nose right around which axis

A

Vertical axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the stabiliser also known as

A

The all moving tail

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the two types of canards

A

Lift and control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the advantage of the v tail

A

Saving weight because no vertical stabiliser is needed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the disadvantages of the v tail

A

No full deflections both ways can be achieved

More complicated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is pitch trim achieved by

A

THS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which way does the balance tab move compared to the control surface

A

The opposite way

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which way does an anti balance tab deflect

A

The same direction as the control surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How much does the fowler flap increase lift by

A

95%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are wing fences used for

A

To combat span-wise flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a vortex generator used for

A

Improve boundary layer control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

In what region is the air said to be incompressible

A

Subsonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

In which region is the air compressible

A

Supersonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What speeds are subsonic

A

0.8 Mach and below

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the regions of transonic

A

0.8 and 1.2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is supersonic speed

A

1.2 and 5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is Mach number

A

Aircraft speed divided by speed of sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is the critical Mach number
The highest speed possible with out going supersonic
26
What speed does a normal shock wave take place
Mach 1.2
27
What are the characteristics of a transonic profile
- Flatter upper surface - More curved leading edge - Thinner trailing edge
28
What are the two main types of waves formed during supersonic flow
- Shock waves - Expansion waves
29
What are the 3 axis of motion
- Lateral - Longitudinal - Vertical
30
What flying controls move around the lateral axis
Elevators
31
What is meant by aileron lockout
Outboard ailerons become inactive in high speed flight
32
What are the advantages of a V tail
No need for horizontal stab so saves weight
33
What are the disadvantages of a V tail
- Less stability - Adjustment is complicated - no full rudder or elevator deflection at the same time - Needs larger surface area
34
What are the secondary flight controls
Lift devices and trim systems
35
What lift device gives the maximum increase in lift
Fowler flap
36
What are trim systems used for
Compensate for imbalance in the aircraft
37
How do vortex generators reduce wave drag
They produce a vortex that transferres energy from the free air stream to the boundary layer
38
What are the 3 types of balance that are used on flying controls
- Balance tab - Anti balance tab - Balance panel
39
Does the balance tab aid the pilot
Yes
40
What is an anti balance tab
Moves in the same direction as the control surface but harder for the pilot
41
What part of air changes with the onset of transonic flight
Compressibility
42
What is Mach number
Speed of aircraft compared to speed of sound
43
What is the critical Mach no
Highest aircraft speed before hitting Mach 1
44
What design delays Mach crit
Swept back wings
45
Where does supersonic flow first occur on an airfoil
On top of the wing
46
What happens to air velocity in expansion waves
Increases
47
Why does flow separation occur behind a shockwave
The boundary layer doesn’t have enough kinetic energy to withstand the large increase in static pressure
48
When does a bow wave form on the leading edge
When flight speed exceeds the speed of sound
49
What drag increases due to the use of vortex generators
Parasitic drag
50
Which wing is known as the rear loaded with
Transonic
51
What are the possible advantages of the rear loaded wing
- Performs well within the transonic range - Less drag - Smaller wing - Better low speed characteristics
52
How is tuck under avoided on modern aircraft
Horizontal stabiliser - Mach trim
53
What are the two type of aerofoils that form on supersonic profiles
Normal and oblique
54
Which type of shock wave causes an increase in the velocity of airflow
Expansion wave
55
How does a vortex generator re energise and boundary layer
It takes high energy from the outside and mixes it with low energy air from the inside
56
What would be the effect on the aircraft with the slats are selected out
Increased lift, decrease angle of attack, increase drag
57
When would the boundary layer separate from the serif oil section
When the normal shock wave forms
58
What are the advantages and disadvantages of anti balance tabs
Advantage - increase efficiently of control surface Disadvantage - more effort is required to move control surface
59
What detrimental effect does aerodynamic heating have on metals
Loses its strength. 80% with ally if temp above 250 degrees
60
What is the point at which airflow over a wing is at its maximum but below the speed of sound
Critical Mach point
61
What is the normal sweep angle on modern aircraft
30 degrees
62
What is formed at a supersonic intake to ensure good airflow to the engine
Oblique shock wave
63
There is a large increase in what behind the shock wave on an airfoil section
Static pressure
64
What are the differences between normal wing profile and a transonic profile
Transonic wing has flatter upper surface, more curved leading edge and thinner trailing edge
65
What is monocoque construction
Frames formers and bulkheads with skin carrying the primary stress
66
What is a semi monocoque construction
Same as monocoque but with longitudinal members reinforcing the shell
67
What is safe life
The period in which failure is unlikely
68
What 3 surface treatment techniques are used on aluminium
- anodising - chemical conversion coating - wash primer
69
What is a body station
Vertical plane right angle to the body centreline
70
What is a waterline
Horizontal plane at right angle to the body stations
71
What is bbl short for
Body buttock line
72
What are the purpose of frames
Structural support and to attach other things to
73
What are the purpose of stringers
Some structural support but mainly give shape and attachment points for the skin
74
What are the purpose of floor beams in aircraft structure
Carry tension loads during pressurisation
75
What spacing is normally used between frames
20 inches
76
At production breaks how are stringers attached together
Stringer splices
77
What shape clips can be used to attach stringers to frames
T shaped

M11 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions