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ATO Course > Javelin FGM > Flashcards

Javelin FGM Flashcards

1
Q

What are the FGM-148 Javelin assemblies?

A

Command Launch Unit (CLU)

All-Up-Round (AUR)

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2
Q

What are the two motors of the Javelin and how are they configured?

A

Launch Motor & Flight Motor

In Line

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3
Q

What pressures does the Javelin BCU operate and vent at?

What is the proof pressure?

A

Operate at 7500 psi

Vent at 13,900 psi

Proof pressure 15,000 psi

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4
Q

What does the Launch Tube Assembly (LTA) consist of?

A

Forward & Aft End caps

CLU Interface Connector

Latch Assembly

Carry Handle

Shoulder Strap

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5
Q

What are the sub-components of the infra-red seeker section?

A

Imaging optics system

Staring focal plane array (FPA)/Dewar

Stabilsed platform

Azimuth/elevation gyroscope

Gimbal angle sensors

Cryostat

Contact fuse for precursor warhead

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6
Q

“Missile Fin Lock” is one signal required prior to firing warheads, what are the other two?

A

Missile Safe Separation

Missile ‘good guidance’ from GEU

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7
Q

What constitutes the Flight Motor, and how much?

A

1536g of RDX/NG/BTTN

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8
Q

What are the three components of the Guidance section?

A

Infra-red Seeker Section

Precursor Warhead

Guidance Electronics Unit

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9
Q

CLU Trigger operation time

A

Minimum 400ms

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10
Q

What are the four modes of operation for the CLU

A

Off

Day

Night

Test

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11
Q

What are the six phases of operation for the Javelin?

A
  • CLU Prep, cooldown and Standby
  • Activate AUR
  • Track target
  • Launch
  • Flight Control
  • Warhead Detonation
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12
Q

Phases of Operation

A
  • CLU Prep, Cooldown and Standby
  • Activate AUR
  • Track target
  • Launch
  • Flight Control
  • Warhead Detonation
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13
Q

Label Diagram - AUR

A
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14
Q

What is size and weight of the precursor warhead and what type of explosives is used?

A

60mm

372g

LX14

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15
Q

How long does the BCU function for?

A

Battery life of four minutes

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16
Q

What four events are controlled by the CESAF (Common Electronic Safe Arm Fire)?

A

Launch motor

Flight motor

Precursor charge

Main warhead

17
Q

Label Diagram - Guidance Section

18
Q

What signals does the ESAF and CESAF require to arm the missile?

A
  • Missile Fin Lock
  • Missile Safe separation
  • Missile ‘Good Guidance’ From GEU
19
Q

What are the Safe separation Distances and times?

A
  1. 75 to 1.8s
  2. 5m
20
Q

What type and thickness of armour is the javelin designed to defeat?

A

ERA with 100mm RHA frontal

ERA and 80mm RHA side

ERA and 50mm RHA top armour

21
Q

How does the Javelin Operate

A

Gunner attaches CLU to the LTA
Forward end cap removed
Target acquired, either with optics or the Thermal Imaging (TI) sight
Gunner activates missile seeker by pulling left trigger on CLU
After approximately 9.5 secs the missile seeker cools down
Flight software data is downloaded and missile becomes operational
Once missile is operational infrared imagery from
Seeker is viewed by gunner through CLU
Tracker software data downloaded from CLU to missile
Gunner then positions track gates to specify the target portion of the seeker image
Target maybe engaged either by DA or OTA
On completion of target lock on gunner depresses CLU fire trigger
Depression of trigger fires missile restraint pin squib to fire
On successful completion of pre launch tests software issues command to fire launch motor
Overpressure from LM opens aft membrane and propels missile forward
Forward motion fractures forward seal and severs umbilical cable and gas line interfaces
Missile continues along LTA until missile wings and fins clear the LTA
Once clear of LTA and confirmation of correct launch, missile software issues command to ignite FM
Warhead is armed following safe separation distance from operator determined by CESAF module
Seeker and tracker software continues to track target to impact without intervention by gunner

If you’re still reading this flashcard, kill yourself

22
Q

What constitutes the All Up Round (AUR) of the Javelin?

A

Launch Tube Assembly (LTA)

Missile

Battery Cooling Unit (BCU)

23
Q

What does the BCU Contain

A

102cc of Argon gas

Pyrotechnic Initiator

Pressure relief mechanism

24
Q

What are the four Missile components?

A

Guidance Section

Main Warhead Section (Mid-body section)

Propulsion section

Control Section

25
Q

What does the Control Actuator System (CAS) control?

A

The Control Fin and TVC Vane position

26
Q

What signals does the ESAF and CESAF require to arm the missile?

A
  • Missile Fin Lock
  • Missile Safe separation
  • Missile ‘Good Guidance’ From GEU
27
Q

How long does the seeker need to cool?

A

9.5 seconds

28
Q

What is the composition of the LM?

A

100g cylindrical extrduded M-36 propellant grain

29
Q

What is the composition is the Main Charge Warhead?

A

1422g of LX-14 explosive billet

Molybdenum shaped charge liner

2.7g PBXN-5 booster

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