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Theory Of Flight > Aircraft Systems > Flashcards

Aircraft Systems Flashcards

1
Q

Avgas used for?

A

Piston engines a/c or internal combustion engines a/c

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2
Q

Avtur and avgas equals

A

Avtag

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3
Q

Avtag is known as what’s? Avtur and gasoline

A

Wide cut fuel

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4
Q

Avcat is avtur and diesel used together and is used on?

A

Carriers

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5
Q

Avtur FSII stands for?

A

Fuel system icing inhibitor

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6
Q

Avcat with fsii is used on?

A

Carriers

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7
Q

Name the fuel system,

A

Fuel from main tank to collector tank by jet pump.

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8
Q

What is cross feeding?

A

Cross feed is when one tank feeds more than one engine

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9
Q

How do we move fuel from one tank to another?

A

Fuel transfer.

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10
Q

What colour are fuel warnings and cautions?

A

Red and amber

Warnings and cautions

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11
Q

What side is in the low pressure side of the airframe?

A

LP pump, LP fuel cock

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12
Q

Most commonly used fuel in gas turbine engines

A

Aftur or avtur fsii

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13
Q

Flash point of fuel is?

A

Lowest temp at which fuel can combust

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14
Q

What happens if you close the LP fuel cock?

A

Prevent fuel reaching the engine.

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15
Q

Parts of an engine?

A

Intake, compressor, combustion chamber, turbine, exhaust

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16
Q

Brayton cycle?

A

Induction, compression, combustion, exhaust. Compression goes up with pressure axis

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17
Q

Turbo fan engine is driven by what?

A

Low pressure turbine at the rear. It’s the last turbine and it drives the fan. It extracts sufficient energy from the gas to drive the fan

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18
Q

2 types of compressor

A

Centrifugal and axial

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19
Q

Centrifugal

A 
Cheap
Easy to make
Low maintenance 
Small mass flow rates
Large frontal area
Air flows radially in the compressor 
Usually single stage 
86% efficient
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20
Q

Turbo prop

A

Gas turbine driving a propellor. Uses max energy from gas to drive propellor.

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21
Q

Propellor propulsive efficiency

Blue line is turbo prop

A

Blue line is turbo prop

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22
Q

Turbo prop drops off at 350 kts why?

A

Shockwaves at the tips.

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23
Q

Stall is what?

A

A partial breakdown of airflow through the compressor

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24
Q

Surge?

A

A total breakdown of airflow through the compressor

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25
Q

Purpose of oil filter?

A

To remove debris from system

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26
Q

Boundary lubrication?

A

Surfaces are kept in contact

27
Q

Hydrodynamic lubrication?

A

Layers are apart

28
Q

Oil tank is what

A

Main storage for oil

29
Q

Boundary layer lubrication appears where?

A

Start up

30
Q

Left of fuel pump is low px right is high px

A

.

31
Q

High pressure system components include?

A

Throttle valve FCU, HP shut off valve and one other

32
Q

Bleed air used for?

A

Starting engines, cabin heating, cooling, pressurisation

33
Q

Purpose of engine oil system?

A

To lubricate main bearings

34
Q

Rpm monitored on?

A

Phonic wheel

35
Q

Tachogenerator measures?

A

Engine speed

36
Q

Materials should be?

A

High strength
Low cost
Light
Easy to make

37
Q

Design lidimit?

A

Max lod the designer would expect an airframe to experience in service

38
Q

Wing structure

A

Ribs, rear spa are the 2 answers

39
Q

Wing loading?

A

Loads on the wing from manoeuvre and the pay load. Payload and G is wing loading

40
Q

Name 3 wing positions?

A

See pic

41
Q

Empenade?

A

.

42
Q

All flying tail plane?

A

Used on heavy cargo aircraft

43
Q

Canard

A

A full plane and reduces drag trim at high speed

44
Q

Tail plane on tornado?

A

Taileron for pitch and roll

45
Q

V type tail plane is for

A

Pitch and yaw

46
Q

Secondary flying controls?

A

Lateral axis elavators
Normal axis
Longitudinal axis

47
Q

Horizontal stabiliser

A

All flying tail plane as whole angle of attack can be changed

48
Q

Fire detection system is to

A

Detect fire or accessible heat

49
Q

Areas detectors in

A

Cargo holds baggage areas, engines

50
Q

Spot detectors

A

Anywhere that could get hot. All over the place.

51
Q

Fire warning

A

Visual and audible warning

52
Q

Problems common in what areas?

A

High electrical areas.

53
Q

Fire wire?

A

Steel tube with inner wire. Both are charged. If the insulating material gets heated up they make the circuit

54
Q

Fuel leaks IVO hit equipment

A

.

55
Q

Correct ground de icing procedure

A

Clear off snow etc, then start spraying de icer

56
Q

Identify a wing icing probe

A

Stick out side of a/c wing

57
Q

Where is air taken from for anti icing?

A

Bleed air from the compressor.

58
Q

Stress is?

A

Load per area unit of cross section

59
Q

Strain is?

A

Deformation caused by stress

60
Q

Stiffness or rigidity is?

A

Ratio of stress over strain.

61
Q

Design load limit is?

A

Maximum load the designer would expect an airframe to experience in service.

62
Q

High wing?

A

Enables ease of cargo loading

63
Q

Mid-wing?

A

Low RCS

64
Q

Low wing

A

Shorter undercarriage, crash protection

Theory Of Flight (10 decks)

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