Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

M11 > 11.1 Aerodynamics > Flashcards

11.1 Aerodynamics Flashcards

1
Q

What are the three main aircraft axes?

A

. Lateral
. Longitudinal
. Vertical

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

Regarding the 3 aircraft axes what motion acts around them?

A

. Lateral = pitch
. Longitudinal = roll
. Vertical = yaw

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

What are the three primary flight controls?

A

. Ailerons
. Elevators
. Rudder

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

What are the 4 secondary flight controls?

A

. Slats
. Flaps
. Flight spoilers
. Trim systems

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

What may be added to increase the efficient of aileron flying control surfaces?

A

Roll spoilers

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

What is used for roll control around the longitudinal axis?

A

2 ailerons

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

When one aileron deflects upwards….?

A

The aileron on the other wing deflects downward

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

When are both the inboard and outboard ailerons used for roll control?

A

During low speed flight to improve turn efficieny

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

During high speed flight, only the ……. Aileron is used

A

Inboard

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

What is used for pitch control around the lateral axis?

A

Elevators

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

Do elevators move at the same time or are they differential?

A

They operate at the same time in same direction

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

Up deflected elevators create what effect?

A

Nose up attitude

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

Why is the stabiliser sometimes referred to as an all moving tail?

A

Because it has a fully movable aircraft horizontal stabiliser

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

What aircraft are stabilators normally found on?

A

High speed military aircraft

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

What is the purpose of a stabilator?

A

To enhanced manoeuvrability and eliminate Mach tuck caused by shock waves

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

What happens if the pilot pulls the yoke rearward ( towards them)?

A

Nose will go up, elevators deflected up

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

Where is a canard located?

A

Fuselage mounted, horizontal surface, fwd of wing.

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

What does a canard provide?

A

Longitudinal stability and control

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

What are the two main designs of a canard?

A

. Lifting canard
. Control canard

20
Q

What is the rudder used for?

A

Used for yaw control around the vertical axis

21
Q

What is the purpose of the rudder limiter system?

A

It limits the amount the rudder can move at high speeds

22
Q

What is the degree of full rudder travel of travel up to 150 knots?

A

30 degrees

23
Q

What is the difference between speed brakes and spoilers?

A

Speed brakes are purely to cause drag
Whereas, spoilers increase drag and reduce lift

24
Q

How much does a plain flap increase lift by?

A

55%

25
Q

How much does a fowler flap increase lift by?

A

95%

26
Q

Describe a slat

A

A movable leading edge of the wing, when retracted, forms a slot

27
Q

What are the two main drag devices?

A

. Air brakes
. Spoilers

28
Q

Where are spoilers located and what is the purpose of them?

A

Located on upper surface of wing close to trailing edge.
Function is too increase drag and decrease lift

29
Q

What is the purpose of a vortex generator?

A

Improves boundary layer control

30
Q

How does a vortex generator work?

A

Takes relatively high energy air from outside of boundary layer and mixes it with low energy air in the boundary layer, thus reducing span wise flow

31
Q

What do stall wedges (strips) ensure?

A

That the root stalls before the tip

32
Q

What does the trim system compensate for?

A

Compensates for any imbalances of the aircraft for a steady flight

33
Q

What are the three things control collum systems can be divided into?

A

. Control input
. Control transmission
. Control surface output

34
Q

What does the side stick control?

A

. Pitch ( elevators) - up and down
. Ailerons - left and right and roll spoilers for roll control

35
Q

How is rudder control done?

A

By rudder pedals

36
Q

Where are the control inputs for secondary flight controls normalled placed?

A

On the pedestal

37
Q

Control inputs can be done by three different ways, what are they?

A

. Hydraulically
. Electrically
. Mechanically

38
Q

Where are control surfaces normally placed and why?

A

At the trailing edge of the profile, so it can change the camber size to facilitate for increase or decrease of lift

39
Q

A basic control surface is an aerodynamic horn, where is it placed and why?

A

Located just forward of the hinge line
Moves into the wind during deflection aiding movement

40
Q

What is the purpose of the balance tab?

A

Changes the camber of control surface and accelerated air flow at trailing edge which assists the deflection of control surface of pilot

41
Q

What control surface requires a mixer unit?

A

Ruddervators

42
Q

What is the purpose of the anti balance tab?

A

The anti balance tab deflects in the same direction as the control surface which increases the efficiency of the control surface but makes the deflection effort harder for the pilot

43
Q

How does the control tab work?

A

The pilot operates the tab and the lift produced by the tab operates the control surface. The pilot can feel the air load on tab and not the control surface

44
Q

What is the tim tab used for?

A

To correct any imbalances in the aircraft

45
Q

How is the trim tab operated?

A

From the cockpit via a cable system, a screw jack and a trim rod

46
Q

How do ailerons respond if the pilot rolls the aircraft to the left?

A

The aileron on the left wing moves up and the aileron on the right wing moves down

47
Q

What is the effect of pulling the control column rearwards?

A

Elevators deflect upward, nose up

M11 (41 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions