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Apps > Missile > Flashcards

Missile Flashcards

1
Q

Definitions

A
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2
Q

Jet propulsion vs. Rocket propulsion

A
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3
Q

Three types of missile

A

Cruise - longer range, close to ground, jet propulsion

Tactical - ESSM/harpoon, least range

Ballistic - global range, uses ballistic energy after propulsion

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4
Q

Three uses for missiles

A

Land attack - stationary targets on land

Anti surface - surface vessels

Anti air

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5
Q

Two roles for missiles

A

Defence - protect allied positions, units

Offence - strike enemy units

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6
Q

4 step launch sequence

A

Handshake

Upload track data/other info, missile acknowledges

Engine test/activate battery, ack signal

Motor fires, launch and verify missile launch

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7
Q

3 parts of missile launch path

A

Boost

Mid course - longest for most missiles, use terrestrial, celestial, inertial

Terminal - homing, command

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8
Q

Flight dynamics and describe (pic)

A

Lift - relative wind comes onto aircraft generates force on aircraft, becomes either drag or lift depending on angle of attack. Lift > gravity, stays in air

Stability - tendency to return to original position facing up, center of pressure has to be behind center of gravity. Can impact manoeuvrability

Stall - crit angle of attack exceeded, depends on design and speed, not generating enough lift

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9
Q

Label flight dynamics diagram

A

No pic

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10
Q

Purpose of launching system

A

Place a weapon into a flight path as rapidly as situation demands

Requirement:
Speed
Reliability
Safety
Comparability

Types:
Vertical
Rail
0 length
Canister
Platform

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11
Q

What is telemetry

A

Process of collecting missile flight data to improve performance and provide safety and control

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12
Q

Misfire vs. Dud

A

Misfired missile - missile that fails to ignite its engine or booster on launch

Dud - Fails to initiate its warhead

Restrained firing - missile ignites but isn’t released from launch system

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13
Q

5 sections of missile

A

Control system

Warhead

Body

Guidance system

Propulsion

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14
Q

Label missile diagram

A

Pic

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15
Q

3 types of control surfaces

A

Canard

Tail fin

Wing

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16
Q

3 components of guidance section

A

Seeker (terminal phase)

Flight computer

Autopilot

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17
Q

3 categories of guidance

A

Command

Homing
Active
Semi-active
Passive
Re-transmission (calcs outsourced to
platform, like semi-active)

Navigation
Intertial (onboard gyro)
Celestial (ICBM)
Terrestrial (load terrain)
Ranging

18
Q

4 types of homing logic

A

Proportional - PIP calculates but missile doesn’t fly towards PIP immediately, farther away less manoeuvring, closer means more manoeuvrability

Pursuit - missile points it’s seeker at target all the time

Line of sight - base station illuminates target for missile, missile flies towards it

Constant bearing - predicts where missile can intercept, flies towards that, recalculated intercept as flight path changes

19
Q

Warhead diagram

A

Pic

20
Q

Secondary damage elements

A

Any elements of the missile that increase the damage effect (missile body, fuel)

21
Q

Explosive transfers destructive energy to target

A

Energy coupling

22
Q

How is yield measured

A

Measured in relation to TNT equivalent of the blast it produces

23
Q

Char of warhead that dictate how much dmg it imparts

A

Damage volume- kill zone

Attenuation - how fast does damage being done attenuate (hellfire)

Propagation - how damage is sent into atmosphere

24
Q

Types of warheads

A

Explosive (conventional and nuclear

Special purpose (unconventional)

Conventional - blast warhead, fragmentation, rod, shaped charge

Unconventional - chemical and biological

Blast warhead
Drag loading - object is fixed hit by shockwave suffers strain and may collapse, not fixed it flies around
Diffraction loading - shock wave applies to all sides (house being squeezed)

25
Q

Special purpose warheads

A

Chemical

Biological

26
Q

Jet engine

A

Propels the missile

Thrust opposite of expelled gas jet

Turbo jet/fan, ramjet, rockets

Components of turbo jet/fan [engine core]
Compression
Turbine - spins compressed air
Combustion

27
Q

Turbojet

A

Engine core makes up bulk, air input, compressed, combusted

Used by cruise missiles primarily

28
Q

Turbofan

A

Fan in front puts air around engine core, some goes through the core

Larger, slower, not great for missiles

29
Q

Ramjet

A

Forward motion to start, inlets compress air, combusts, forced out of nozzle

30
Q

Scramjet

A

Hypersonic speed

31
Q

Rocket liquid and solid propellant

A

Fuel and oxidizer in body of missile

Liquid - fuel and oxidizer in separate tanks, mixed then ignited. Not used in ship missiles

Solid - grain packed into cylinder, burn propellant and produces high amount of gas

32
Q

Rocket nozzle

A

Produces thrust through restriction of gas through nozzle

33
Q

3 main components of control section

A

Control surfaces - change forces on missile, force to turn. Canard, wing, tail

Actuators

Control computer - receive info from guidance computer and gives commands to actuators

34
Q

2 control arrangements

A

Cruiciform - control surfaces 90 degrees from each other

Planform - control surfaces 180 degrees from each other

35
Q

Bank vs skip to turn

A

Bank - aircraft rolls, centripetal force in direction of roll and turns aircraft, lose lift, decrease altitude unless you increase power/angle of attack

Skid - use control surfaces to fly nose where you want to go

36
Q

Missile structure

A

Pic

37
Q

Nose cone

A

Rounded vs pointed nose cone

38
Q

Forces acting on missile

A

Dynamic - platform hit by missile, launch, flight

Static - sitting in canister

39
Q

Sectionalism in missile design

A

Replace/upgrade just 1 section instead of whole missile

Separate missile into sections

40
Q

Size design

A

May impact range and manoeuvrability, could have larger payload, less stealthy

41
Q

Design factor pay-offs

A

Range
Payload
Guidance
Speed

42
Q

Tests and trials for missiles

A

EHM

Alignment

Tests:
Missile tests (BIT)
System tests
Alignment tests
Flight tests (Telemetry)
Live-fire

Apps (6 decks)

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