Brainscape's Knowledge GenomeTM

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


See full index

Module 11 > 11.1.1 Aeroplane Aerodynamics and flight controls > Flashcards

11.1.1 Aeroplane Aerodynamics and flight controls Flashcards

1
Q

What are the 3 motions of an aircraft around the 3 axis’?

A
  • Pitch
  • Roll
  • Yaw
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the primary flight controls?

A
  • Ailerons
  • Elevators
  • Rudder
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

On larger aircraft, what can be added to the wing to increase efficiency?

A

Roll spoilers

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

What are the secondary flight controls?

A
  • Slats
  • Flaps
  • Trim systems
  • Flight spoilers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What ailerons are used in high-speed flight?

A

Inboard ailerons

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

What will happen to the aircrafts nose if an elevator deflects upwards?

A

The nose attitude would go upwards

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

What is a “stabilator”?

A

A fully-movable aircraft horizontal stabiliser

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

What type of aircraft are most common to have stabilators?

A

High-speed military combat aircraft

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

What are the two types of canards?

A
  • lifting canard

- control-canard

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

What is a lifting canard?

A

The weight of an aircraft is shared between the wing and the canard

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

What is a control canard?

A

Almost all of the weight is carried by the wings, the canard is primarily used for pitch control during manoeuvres

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

What is the disadvantage of using lifting canards?

A

The wings need to be larger or the same size as designed without the canard (due to the requirements stating that the canard would have to stall before the main wings)

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

What is the purpose of a rudder limiter system?

A

It limits rudder travel at high speeds in order to prevent rudder/stabiliser overload

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

At slow speeds (<150kts), what angle will the rudder have full deflection?

A

30° is permitted

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

At what speed is the intermediate (15°) travel of the rudder permitted?

A

Between 150-200 knots

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

What angle is the minimum travel of the rudder at high-speeds (> 200Kts)?

A

5.7° deflection

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

What is a ruddervator?

A

A combination of a rudder and elevator (v-tail)

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

What are the disadvantages of a ruddervator?

A
  • larger control surfaces
  • no full elevator/rudder deflection at the same time
  • aircraft stability is reduced
  • more complicated adjustment mechanics
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a delta wing aircraft?

A

A tailless Aircraft like Concorde

- the aircraft has elevons (a combination of elevator and ailerons)

20
Q

What are flaperons?

A

Some aircraft have them
- they usually work as ailerons but deflect symmetrically downwards when the flaps are extended (known as the aileron droop function)

21
Q

What are wing flaps usually used for?

A

Landing - by increasing drag and lift

Take off - on Large Aircraft to increase lift

22
Q

How do the flaps work on a wing?

A

When the flaps extend they change the camber of the wing and this increases the coefficient of lift at slower speeds

23
Q

What are the types of flaps?

A
  • plain
  • slotted
  • split
  • fowler
24
Q

What type of flap is the most effective?

A

The fowler flap - up to 95% increase in the maximum lift coefficient

25
Q

What is the purpose of slots in secondary lift devices?

A

They prevent an early flow-separation

26
Q

How much do slats increase the lift by?

A

Approximately 35%

27
Q

What is the purpose of spoilers?

A

They increase drag and reduce lift

28
Q

What are Air brakes?

A

Aircraft structure that deploys outwards into the airflow. They are only located where the aircraft structure can withstand heavy air-loads

29
Q

What is spanwise flow?

A

When air particles flowing over a swept wing travel in two different angles; down the leading edge and then at right angles over the wing
- thickens the boundary layer at the wing tip increasing the possibility of flow separation (at low speeds/high AOA)

30
Q

What can be used to prevent/reduce the effects of spanwise flow?

A
  • Wing fences

- Saw-tooth leading edge

31
Q

What is a vortex generator?

A

It improves boundary layer control on a wing by taking relatively high energy air from outside the boundary layer and mixing it with low energy air in the boundary layer

32
Q

How are the number and location of vortex generators determined?

A

It depends on flight test investigations

33
Q

What is the purpose of a stall wedge (strip)?

A

Installed at the wing roots so that with high angles of attack it disrupts the airflow to separate early causing it to stall at the root before the wing-tips (giving ailerons maximum control throughout the stall)

34
Q

What is the purpose of a trim system?

A

It compensates for the imbalance of an aircraft

35
Q

What are the 3 control inputs for the primary flight controls in the cockpit?

A
  • control column
  • control wheel (yoke)
  • rudder pedals
36
Q

What is a ruddervator made up of?

A

A mixer unit that when moving the control column, it rotates the gimbal of the mixer unit

37
Q

Airbus use side-sticks instead of a control yoke or column. How is the rudder input completed?

A

Via the rudder pedals still

38
Q

What are control runs that transmit the pilots input into the flying control system called?

A

Transmissions

39
Q

What are the main components of a mechanical control run?

A
  • rods

- cables

40
Q

On larger aircraft, the pilots require assistance to operate the control surfaces. What provides this assistance?

A

The aerodynamic balance - reduces the force required to operate

41
Q

What is the purpose of a horn on an aircraft control surface?

A

It moves into the wind during deflection for aiding movement

42
Q

What are the two types of aerodynamic horn balance?

A
  • horn balance

- insert hinge

43
Q

What is the disadvantage of using a balance tab?

A

It reduces the efficiency of the control surface

44
Q

How does a balance panel create differential pressure?

A

The chambers allow pressure from outside to enter via the slots which in turn produces a force in the panel to assist in the deflection

45
Q

What is the advantage and disadvantage of using an anti-balance tab?

A

Advantage:
- it increases the efficiency of the control surface unlike the balance tab
Disadvantage:
- more effort is needed than the balance tab

46
Q

What is the purpose of a trim tab?

A

It compensates for the imbalance of the aircraft

Module 11 (4 decks)

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