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AT 0013 > Basic Bricks > Flashcards

Basic Bricks Flashcards

1
Q

What are the 7 Basic Bricks?

A
  • Structure
  • Propulsion
  • Guidance
  • Control
  • Auxiliary Power
  • Payload
  • Fuzing
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2
Q

What is the definition of Guided Weapon?

A

A weapon system in which the warhead is delivered by an unmanned guided vehicle.

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3
Q

Limitations of GW?

A
  • Range and ceiling
  • Lethality
  • Accuracy
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4
Q

Advantages of GW?

A
  • Increased hit probability
  • Range
  • Ceiling
  • Weight of fire
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5
Q

Disadvantages of GW?

A
  • Cost
  • Reliability
  • Response time
  • Minimum range
  • Flight time
  • Support Requirements
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6
Q

Factors affecting GW design?

A
  • Role
  • Size and weight
  • Target
  • Guidance
  • Control
  • Warhead
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7
Q

What are the 3 main types of Auxiliary Power?

A
  • Electric
  • Pneumatic
  • Hydraulic
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8
Q

What are the design factors for Auxiliary Power?

A
  • Weight
  • Storage
  • Capacity
  • Rapid Activation
  • Fluctuation
  • Strength
  • Stability
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9
Q

What are types of Electrical Power sources?

A
  • Dry Batteries
  • Mercury Cells
  • Thermal Batteries
  • Accumulators
  • Generators / Alternators
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10
Q

What is Pneumatic Power sources used for?

A
  • Run up gyroscopes
  • Power actuators
  • Drive turbines
  • Pressurise hydraulic systems or liquid propellant feed systems
  • Provide cooling air
  • Operate S&A mechanisms
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11
Q

What are the 3 main sources of Pneumatic Power?

A
  • Compressed air or gas
  • Propellant gases
  • Ram air
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12
Q

What are the 2 types of Hydraulic Power systems?

A
  • ‘One Shot’ system
  • Recirculatory system
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13
Q

What are the 2 main tasks for Auxiliary Power?

A
  • To energise electrical circuits and power electronic moving components.
  • To power mechanical devices of the servo and actuator type.
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14
Q

The whole GW system includes?

A
  • The missile
  • Launch equipment and means of transmitting guidance signals to the missile
  • Surveillance and tracking radars
  • Specialist vehicles and power supplies
  • Test equipment and power supplies
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15
Q

Two Types of Propulsion?

A
  • Air Dependent
  • Air Independent
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16
Q

3 Types of Guidance?

A
  • Predetermined Course
  • Controlled Path
  • Homing
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17
Q

GW Structure comprises of what two items?

A
  • Airframe
  • Skin
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18
Q

What 3 main factors effect the Structure of a missile?

A
  • Role
  • Size and Weight
  • Target
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19
Q

Why are external power supplies required for GW?

A
  • To carry out works such as testing, and aligning and calibrating missile components with ground equipment
  • To run up middle components for launch
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20
Q

Advantages of Thermal Batteries?

A
  • Long shelf life
  • Good power to weight ratio
  • Rapidly activated
  • Provides a stable output
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21
Q

Disadvantages of Thermal Batteries?

A
  • They produce a RF hazard
  • High temps in order of 180°C is caused during activation
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22
Q

Advantages of Accumulators?

A
  • Long shelf life when stored dry
  • A high output can be obtained
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23
Q

Disadvantages of Accumulators?

A
  • Very heavy construction. Low power to weight ratio
  • Wet accumulators require recharging
  • Contain corrosive liquids
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24
Q

Advantages of Generators / Alternators?

A
  • Unlimited shelf life
  • Provide a steady output. Are capable of being stepped up or down in voltage
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25
Q

Disadvantages of Generators / Alternators?

A
  • Tends to be large and complex
  • Generally limited to larger missiles with longer flight times
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26
Q

Advantages of Compressed air or gas?

A
  • Reliable and simple
  • It is reusable
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27
Q

Disadvantages of Compressed air or gas?

A
  • The gas bottles are large. Not suitable for short range
  • May require topping-up in storage
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28
Q

What are the three main sources of propellant gases?

A
  • Solid Propellant
  • Liquid Propellant
  • Motor Bleed-off
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29
Q

Advantage of Solid Propellant?

A
  • Less weight and volume then compressed air or gas
  • Long shelf life
30
Q

Disadvantage of Solid Propellant?

A
  • Gas produced requires cooling and filtering before use
  • Gas production is difficult to control
  • Has a tendency to produce smoke
31
Q

What are 3 categories of warhead?

A

HE
Special
Non Operational

32
Q

What are the 3 types of special warhead?

A

Chemical
Biological
Nuclear

33
Q

The Safety & Arming Mechanism has three functions what are they?

A

-Prevent accidental initiation of warhead
-Arm the warhead after firing when missile is a safe distance from operator
-Translate the fuze firing signal into a detonation wave

34
Q

What is the purpose of the skin on a guided weapon?

A

Gives Aerodynamic Shape
Protects Internal Parts
Adds to Rigidity and Stability of Missile

35
Q

What are the components of a guidance system?

A

Tracking device
Computing device
Directing device

36
Q

What are the 3 phases of guidance?

A

Launch phase
Mid course phase
Terminal phase

37
Q

What are the methods which a predetermined guidance system can be obtained?

A

Preset
Inertial
Terrestrial Navigation
Celestial Navigation
Radio Navigation

38
Q

What is the 3 types of homing guidance?

A

Active
Semi active
Passive

39
Q

What are the advantages to active homing?

A

-After launch the missile will complete the engagement
-It may be used as a terminal phase guidance system for a long range missile

40
Q

Command systems are often classified by the trajectory flown by the missile what are the two types?

A

Command to the Line of Sight (CLOS)
Command off the Line of Sight (COLOS)

41
Q

What are the disadvantages to active homing?

A

-Missile complex and costly
-Target illuminator, receiver and computer are lost with
each engagement
-Limited range as only limited power available in the missile for the transmitted signals
-Very susceptible to ECM as target knows it is being illuminated

42
Q

How does Semi Automatic Command to the Line of Sight (SACLOS) work?

A

-Operator is required to keep the sight coincident with the target
-Missile is then guided onto the line of sight by sensors in the ground equipment
-Sense any deviation and automatically calculates, and sends, the guidance commands

43
Q

What are the three factors affecting the choice of a warhead?

A

role
target
accuracy of missile

44
Q

4 Things required in a control loop?

A
  • Something Controllable
  • Error Detection
  • Error Conversion
  • Controlling Device
45
Q

What is the purpose of the directing device?

A

Means by which commands are sent to the missile

46
Q

Requirements of Auto MSL Control Systems?

A
  • Receive intel from guidance system, interpret it and alter flight path
  • Maintain stable flight path
  • Ensure manoeuvering capabilities are not exceeded
47
Q

2 Main types of control loops?

A
  • Open (Semi-Automatic)
  • Closed (Automatic)
48
Q

Definition of missile guidance?

A

Is the ability to alter the direction of the flight of a missile after launch and usually to be able to do this until it is close to the point of impact.

49
Q

What are the components req. for a Single Channel Control System?

A
  • Airframe
  • Reference
  • ECU
  • Servo Mechanism
  • Control Device
  • Feedback
50
Q

What 3 components make up a Servo Mechanism?

A
  • Transducer
  • Control Valve
  • Actuator
51
Q

What are the 2 components that provide Reference (Control System)?

A
  • Sensor
  • Pick-off
52
Q

What is the role of a Sensor?

A

Detects the movement of the Airframe and responds with proportional movement.

53
Q

What is the definition of Auxiliary power?

A

The power required by a missile in flight other than the propulsive power

54
Q

What forces act on GW?

A
  • Thrust Loads
  • Acceleration Loads
  • Aerodynamic Lift
  • Drag/Dynamic Pressure
  • Aerodynamic Heating
  • Transportation Loads
  • Vibration and Resonance
55
Q

What are the 2 types of Sensors?

A
  • Gyroscopes
  • Accelerometers
56
Q

What are the 2 main types of Gyroscopes?

A
  • Free Gyroscopes
  • Rate Gyroscopes
57
Q

Two groups of Control Devices?

A
  • Aerodynamic Control
  • Thrust Vector Control (TCV)
58
Q

Types of Air Dependent Propulsion Systems?

A
  • Pulse Jet
  • Ram Jet
  • Turbo Jet
  • Turbo Fan
  • Ram Rocket
59
Q

What are the three methods to achieve Gyroscope ‘Run Up’?

A

-Pneumatic Blast
-Electric Motor
-Mechanical Energy

60
Q

What are the two types of Control Valves?

A

-Spool
-Needle

61
Q

What is the definition of Propagation?

A

Manner in which the effect of a warhead is transmitted eg Blast, Fragments etc

62
Q

What is the definition of Isotropic Propagation?

A

Effect is uniform in all direction eg Blast warhead

63
Q

What is the definition of Non-Isotropic Propagation?

A

Effect is directional eg HEAT warhead

64
Q

What are the 3 different Motor configurations?

A
  • Tandem
  • Integral
  • Wrap Around
65
Q

Definition of Attenuation?

A

Reduction in effect of a warhead as the distance from the point of detonation increases.

66
Q

2 types of Blast Warhead?

A

Internal and External

67
Q

Advantages of Solid Propellant Fuels?

A
  • Can be a stress bearing member
  • Ease of handling and storage
  • Non toxic
  • Simple design
  • Immediate response on firing
  • Storage container for propellant
68
Q

Type of fuze is dependent on what?

A

-Role of the missile
-Type of Warhead
-Type of target

69
Q

3 Main Fuze types for GW?

A

-Impact
-VT
-Prox

70
Q

5 types of HE Warhead in GW?

A

HESH, frag, shaped charge, sub projectile, blast

AT 0013 (21 decks)

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