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SMA > Block 1 continued > Flashcards

Block 1 continued Flashcards

1
Q

What do engine ratings represent?

A

The thrust that an engine develops during various operating conditions such as takeoff, climb, cruise or for continuous operation

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2
Q

Engine manufacturers establish engine rating in terms of __________

A

Pounds of Thrust

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3
Q

The three basic conditions which influence the power output of the engine

A

Temperature of the atmosphere
Pressure of the atmosphere
Bleed air extracted from the engine for system operations

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4
Q

The relationship between the temperature of the atmosphere and the power output of the engine

A

high temp = less power

low temp = more power

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5
Q

The relationship between the pressure of the atmosphere and the power output of the engine

A

low pressure = less power

high pressure = more power

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6
Q

From where does almost all of the propulsive force from a turboprop engine come from?

A

The propeller

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7
Q

The engine performs most of its work:

A

Driving a shaft which turns the propeller

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8
Q

The primary indication of power output on the turboprop engine

A

Torque

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9
Q

Most power settings are accomplished in reference to ____________ indications

A

Turbine Inlet Temperature (TIT)

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10
Q

The ability of the engine to produce a constant maximum thrust over a wide temperature range

A

Flat-rated

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11
Q

How might an APU be used during an inflight emergency?

A

To provide backup air bleed to remain pressurized or for heating and cooling and/or to provide electrical power for lights and aircraft equipment at night

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12
Q

APUs operate independently except for:

A

Starting and Fuel

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13
Q

Electrical starting power for an APU is usually generated by the ________________ or sometimes by a ______________________

A

Aircraft battery

A hydraulically driven starter motor

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14
Q

How is fuel for the APU supplied?

A

The aircraft main fuel tanks

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15
Q

What does APU stand for?

A

Auxillary Power Unit

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16
Q

What is another name for an APU?

A

GTC or Gas Turbine Compressor

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17
Q

A Gas Turbine Compressor (GTC) is primarily used with which aircraft?

A

C-130

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18
Q

The three major sections of an APU

A

Compressor assembly
Power turbine
Accessory drive assembly

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19
Q

APUs have their own:

A

Oil system
Fire warning/detection
Fire extinguishing system

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20
Q

Are APU inlet and exhaust doors usually open or closed inflight or while not in use?

A

Closed

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21
Q

How is fuel supplied to the APU?

A

By gravity feed from the aircraft’s main fuel tanks or some aircraft use a battery powered pump

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22
Q

What components of the APU are designed to isolate and prevent the spread of fire?

A

It is enclosed in a titanium firewall
Each component is thermally insulated with an insulation blanket
Fire detection and extinguisher systems are provided

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23
Q

A propeller system is a _____________ attached to a ______________ through a __________________

A

rotating airfoil
jet engine
reduction gear assembly

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24
Q

Why is a propeller used?

A

A propeller is used because it is extremely efficient at low altitude and low air speed

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25
Q

Propellers have controllable ____________ that provides forward and reverse ____________

A
  1. pitch

2. thrust

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26
Q

What does the propeller assembly consist of?

A

Two or more blades; each having an airfoil cross section like that of a wing

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27
Q

How is thrust created in a propeller system?

A

Air flows over a propeller blade, producing a different pressure between the front and rear surfaces, causing thrust to push the aircraft forward

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28
Q

What are the two types of propeller slip taken into consideration during the design of the aircraft?

A
  1. Geometric Pitch

2. Effective Pitch

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29
Q

Define Geometric Pitch

A

Theoretical rotation thru the air (a solid).

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30
Q

Define Effective Pitch

A

Actual rotation of thru the air

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31
Q

What is the difference between geometric pitch and effective pitch?

A

Slip

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32
Q

Adjusting the blade angle of a propeller is a means adjusting the ______ on the propeller in order to control engine ______ and ultimately _______.

A

Load, torque, thrust

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33
Q

What are the four types of blade angles?

A
  1. Zero
  2. Positive
  3. Negative
  4. Feather
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34
Q

Zero blade angle =

A

No Thrust (Idle)

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35
Q

Positive Blade Angle =

A

Positive Thrust (Normal operation)

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36
Q

Negative Blade Angle =

A

Reverse Thrust (Thrust reverse for landing on short runways)

37
Q

Feather Blade Angle =

A

No Thrust (Engine Shutdown) (Slow or no rotation/ 90 degrees)

38
Q

What absorbs power from the engine and convert the energy into aircraft forward motion.

A

Propeller

39
Q

Blades are _____ to maintain angle of attach down the entire length of the propeller blade.

A

Twisted

40
Q

Rotational velocity is _____near the hub and ______ near the tip.

A
  1. Low

2. High

41
Q

To be efficient the propeller must be able to change its….

A

Blade angle for varying flight conditions.

42
Q

What is the result of shape and angle of the propeller blade?

A

Thrust

43
Q

____ of the engine torque absorbed by the propeller, ____ lost to friction & slippage.

A

80%, 20%

44
Q

Adjusting the blade angle changes the load on the propeller which will…

A

increase or decrease engine torque

45
Q

Propeller System components consists of the following traits?

A
  1. Four Blade
  2. electro-hydromatic
  3. constant speed
  4. full feathering,
  5. reversible pitch propeller.
46
Q

In a Propeller System controllable pitch =

A

Forward & reverse thrust

47
Q

The Propeller System is a self contained unit containing….

A

Rotating and stationary components.

48
Q

Propeller blades are made of ______ ______ _______

A

Solid aluminum alloy

49
Q

Propeller blade shank (Base) is partially hollow…

A

For weight reduction

50
Q

Propeller blades incorporate a fairing made of plastic foam covered with reinforced nylon rubber to…

A

Direct airflow into the engine.

51
Q

The barrel performs 3 main functions

A
  1. Retain blades within the prop assembly
  2. Transmit engine torque to the blades
  3. Provide a means to attach the propeller to the engine shaft
52
Q

The barrel ______ & _______ ______ bolted together to retain blades

A

Front & rear half

53
Q

What are the four parts of the propeller rotating section?

A
  1. Propeller blades
  2. Barrel
  3. Dome
  4. Spinner
54
Q

What rotating section component contains mechanisms for changing propeller blade angles?

A

Dome

55
Q

What rotating section component is a streamlined housing that encloses the dome, barrel and control assemblies.

A

Spinner

56
Q

Stationary section -

A

Control assembly

57
Q

What consists of hydraulics, control valves, and components to provide for rotating section

A

Control assembly

58
Q

How are both the main rotor and tail rotor driven?

A

By engines through the transmission system.

59
Q

What is the most important part of the aircraft?

A

Main rotor

60
Q

The main rotor provides:

A

Lift to fly, control to move laterally, make turns and change altitude

61
Q

The main rotor must be incredibly ________

A

Strong

62
Q

The angle of the rotor blades are adjusted with each revolution of of the hub by the _____________

A

swashplate

63
Q

The main rotor head is mounted on and driven by the ___________

A

main transmission shaft

64
Q

What part of the main rotor provides attachment points for the main rotor blades and allows the blades to change pitch?

A

The main rotor head

65
Q

Rotor blades are _________ to maintain the angle of attack down the entire length of the blade

A

twisted

66
Q

The tail rotor provides…

A

anti-torque and directional control

67
Q

The aircraft want to rotate in the opposite direction of the rotor blades. This effect is known as __________

A

torque

68
Q

To counteract torque, the aircraft utilizes a _______

A

tail rotor

69
Q

The tail rotor is _________, giving it the ability to steer

A

directional

70
Q

What are the main rotor system components?

A 
Main rotor hub
Droop stops
Bifilar Vibration absorbers
Pitch control rods
Hydraulic dampers
Anti-flap assemblies
Swashplate assembly
71
Q

The mounting point for hydraulic dampers, pitch control rods and anti-flapping assemblies in a main rotor system

A

Main rotor hub

72
Q

Part of the main rotor system that limits the droop of the main rotor blades when the main rotor head is slowing down or at a complete stop

A

Droop stops

73
Q

Part of the main rotor system that absorbs vibrations and stresses, increasing component life and providing a smoother ride

A

Bifilar vibration absorbers

74
Q

Part of the main rotor system that transmits all movement of the flight controls from the rotating swashplate to the main rotor blades

A

Pitch control rods

75
Q

Part of the main rotor system that restrains hunting (lead and lag) motions of the blades during rotation and absorb rotor head engagement loads

A

Hydraulic dampers

76
Q

Part of the main rotor system that prevents the main rotor blades from flapping when the rotor head is slowing down or at a complete stop

A

Anti-flap assemblies

77
Q

Part of the main rotor system that transmits flight control movement to the main rotor head through the pitch control rods. It can tilt in any direction following the motion of the flight control inputs.

A

Swashplate assembly

78
Q

The tail rotor system component are:

A

Tail rotor head

Tail rotor blades

79
Q

The part of the tail rotor system that provides a mounting point for the tail rotor blades and provides a means to change the pitch in the tail rotor blades

A

Tail rotor head

80
Q

The part of the tail rotor system that is similar to the main rotor blades aerodynamically but smaller

A

Tail rotor blades

81
Q

The tail rotor blades are about _______ the diameter of the main rotor blade disk area

A

1/4th

82
Q

An auxiliary power unit is a _____________ support unit

A

self-contained

83
Q

A small gas turbine engine that operates on similar principles as a jet engine and provides ground support to aircraft without ground support equipment

A

Auxiliary Power Unit (APU)

84
Q

An APU provides shaft power to drive an ____________

A

AC generator

85
Q

What does an Auxiliary Power Unit (APU) do?

A

Supplies air for ground operation of the air conditioning systems; engine starting; shaft power to drive an AC generator

86
Q

On some aircraft the APU also supplies air to an air turbine motor which in turn drives a ______________

A

hydraulic pump

87
Q

An APU is _____________ and will shut down ____________ for most malfunctions

A

self-monitoring

on its own

88
Q

APUs are intended for ____________

A

Ground Use

SMA (30 decks)

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