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Blackhands Course > Formative 11 > Flashcards

Formative 11 Flashcards

(58 cards)

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1
Q
  1. List 3 factors that can affect rocket accuracy
A
  • Surface cross winds
  • Propellant Burn Rates
  • Launcher Induced Errors
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2
Q
  1. What are the 2 major components of the 66 Rocket
A
  • Launcher

- Rocket

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3
Q

List the 9 components of the launcher

A
  • Aluminum Tube
  • Fibreglass outer tube
  • Tube detent device
  • Mechanical sight system
  • Firing Mech
  • Safety Interlocks
  • Firing Pin ass
  • Rear cover
  • Shoulder Rest ass
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4
Q
  1. Main Components of the rocket 66
A
  • M72A6 Warhead HE ass
  • Fin group rocket motor
  • M412A1 Fuze
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5
Q
  1. What is the weight and type of propellant in the 66
A

M7 Tubular Grain 122g

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6
Q

The 2.75 HE MK 352 Mod FZ 5 PD consists of 4 main components

A
  • Fuze Body
  • Safe and Arming device
  • Nose Cap ass
  • Booster
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7
Q

What current warheads can be fitted to the rocket motor 2.75 inch FZ90 MOD.2/S

A
  • Warhead 2.75 inch HE FZ 71
  • Warhead 2.75 inch Flash FZ 181
  • Warhead 2.75 inch Practice FZ 120
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8
Q
  1. How many devices lock the rotor in place to provide safety on the Fuze MK 352 MOD FZ 5
A

2 devices lock the rotor in the unarmed position

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9
Q

Can the shorting clip be removed from the rocket motor when unpacked from its container

A

No, only immediately prior to loading into launcher

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10
Q

What does the 21mm sub cal training system consist of

A
  • A recovered fired launcher

- Adapter sub cal rocket launcher M72

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11
Q

What does the 21mm sub cal training system utilise

A
  • Rockets 21mm Sub cal M72A6-S
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12
Q

Can the 21mm sub cal launcher be reused

A

Yes

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13
Q

Can the 21mm sub cal projectile be reused

A

No

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14
Q

In the 21 mm Sub Cal the igniter charge is located within the hollow end of the igniter ass adjacent to the flange? True/False

A

True

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15
Q

What are the components of rocket motor 2.75 inch FZ 90 MOD.2/S

A
  • Rocket motor tube
  • RF igniter ass
  • Propellant grain
  • Nozzle and fin ass
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16
Q

What are the operating limitation for the rocket motor 2.75 inch FZ 90 MOD.2/S

A
  • 46deg to 66deg
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17
Q

What are the main components of the Warhead 2.75 inch HE FZ 71

A
  • Fuze

- Body

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18
Q

What is the fill of the Warhead 2.75 inch HE FZ 71

A

1.05kg Comp B

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19
Q

What are the Warhead 2.75 inch Flash FZ 181 main components

A
  • Body
  • Fuze
  • Flash cartridge
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20
Q

What are the Warhead 2.75 inch Practice FZ 120 components

A
  • Body

- Made from machine billeted steel

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21
Q
  1. Describe the functioning of the rocket motor 2.75 inch FZ 90 MOD.2/S
A
  • Firing current applied to rocket and fuze head
  • Fuze head ignites black powder
  • Propellant grain ignites
  • Burns internally from front to rear
  • Gas pressure builds
  • Rupturing closure disc and foil shield exits through nozzle
  • Rocket travels down the tube
  • Nozzle grooving deflects gasses imparting spin on rocket
  • Fins deploy on tube exit
  • Rocket stabilised by fin and spin
  • Once propellant is all burnt edge on fins maintain spin
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22
Q

What are the disadvantages for the RCL

A
  • Low velocity
  • Flash/ Dust signature
  • Large Propelling Charge
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23
Q

What are the advantages for the RCL

A
  • No recoil
  • Low weight
  • Man portable
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24
Q

What is the current RCL in service used in the ADF and what does it utilise

Study These Flashcards
A
  • The gun 84mm Carl Gustav M3

- Utilises the Blow out disc system

25
What are the types munition that are used with the 84mm Carl Gustav M3
- HE - HEAT - HEDP - Smoke - Illum - ASM - Practise
26
4. What does the abbreviation SAPHEI stand for
Semi Armour Piercing High Explosive Incendiary
27
5. What is the fuze fitted to the 30mm SAPHEI
FZ BD MR 3005
28
1. What are the major components of the FZBD MR 3005
- Fuze Base - Fuze Body - Rotor ass - Firing Pin ass - Priming Relay
29
6. What is the explosive fill within the 30mm SAPHEI
HEXAL (RDX, Aluminium and wax)
30
7. True/ False - Cart 30mm OXAS (TP) is ballistically matched to the SAPHEI
True
31
What are the 2 types of fuzing action for the MTSQ Fuze FFV 447
- Airburst | - Impact (with graze function)
32
How many steel balls are in the CART 84mm HE 144B
Approx 800 closed in 2 neoprene rubber inserts
33
What is the explosive fill for CART 84mm HE 144B
345g RDX/TNT
34
Why is the CART 84mm HEDP 502 classed as DP
It can used in HE and HEAT function
35
Why is the CART 84mm HEDP 502 fin stabilised and not spin
So not to degrade the jet formation of the shaped charge
36
What is the arming distance for the CART 84mm HEDP 502
12 - 40mtrs
37
What are the main components of the CART 84mm Illum FFV 545
- Projectile - Fuze - Cart Case
38
Describe actions of 84mm Illum after expelling charge functions
- Priming composition in top of candle ignites - Candle & half casing forced onto projectile base, breaking shear screws - Candle ejected, half casing fall away - illumination comp ignited
39
3. With the 30mm MR 3005 FZ what happens on self destruct
Self Destruct If projectile has not impacted a target point between 6 -16 sec time of flight the projectile will self destruct. Occurs as a result of the centrifugal force decaying and allow the balls to move inwards Stored energy in the firing spring then drives the firing pin forward in the FZ as normal
40
8. What is the abbreviation BBDA stand for
Back Blast Danger Area
41
9. What is the purpose of the Distance Tube in the 84mm HEAT FFV 551
- Provide optimum stand-off | - Acts as a shock transmitter for the piezo –electric crystals
42
10. Why has the 84mm HEAT FFV 551 have a Silicone Lubricated Slipping Ring
reduces Spin from 7000 to 1000rpm
43
11. What are the differences between the 84mm HEAT and the 84mm TP 552
The inert projectile has no fuze system, booster or explosive warhead and is fin stabilized
44
12. What is the function of the 84mm HEAT rocket motor
Delay unit initiated by propellant gases. Delay burns for 45ms, ignites intermediate charge then ignition charge. Rocket motor propellant ignites, pressure rises on projectile exiting the barrel. Rocket motor delay unit ejected 10m in front of muzzle. Rocket motor burns for 1.5 secs, maximum velocity 339m/s at 450m from muzzle
45
13. What is the function for the 84mm HEAT on impact
When the projectile strikes a target the five piezo-electric crystals convert the shock of impact into electrical energy. Providing the impact is of sufficient strength, the current generated will pass through the four layer diode via the contact piece and function the electric detonator in the rotor. The detonator output functions the booster pellets, which then function the main HE filling and forming the JET
46
14. What are the safety precautions for 84mm HEAT and why must they be applied
- Do not allow a shadow to fall across the projectile or attempt to destroy the UXO during periods of suddenly alternating sunshine and shade that would cause a 2° C change in projectile temperature. - Piezo-electric element stressed by impact is susceptible to changes in temperature. Rapid change of 2° C or more could cause a surge of electrical current sufficient to function the projectile
47
15. Why is the CART 84mm HEDP FFV 502 fin stabilised and not spin stabilised
So not to degrade the formation of the jet from the shaped charge.
48
16. In the 84mm HE what does the mask safety allow the projectile to do
A mask safety in the fuze allows the projectile to pass through multiple targets equivalent to 40 mm pine planks from 0 to 20m without functioning
49
17. What is the MTSQ FFV 447 fitted to
The Cart 84mm HE 441B
50
18. What is the operation of the MTSQ FFV 447 from Firing to Set Time
- Fuze is set to required burst distance - Round is loaded - Firing Pin initiates primer on trigger pull - Primer flashes to ignition composition - Ignition composition flashes through to propellant charge - Propelling gases reach shot start pressure - Driving band engaged and imparts spin - Pressure builds rewards - Blow out disc expelled - Setback forces lock the nose cap into position at the set time and release the hand of the clockwork position - The setback forces also locking the shutter mech in the out of line position - Once the hand is released, the clockwork starts with the shortest time possible being 0.15 seconds. - The centrifugal forces with setback forces and unlock the striker , the firing pin locking plunger and rotate the shutter - At set time the striker is released and functions the clockwork detonator - This acts on a plunger pushing the firing pin functioning the rotor detonator - This intern functions the stemmed lead charge - Detonates small boost charge of PBXN 5 - This functions the magazine charge of RDX/TNT - Functioning the main charge
51
19. How many pre selected ranges does 84mm Illum 545C have
Seven
52
20. What is the safety wait time for the 84mm Illum 545C and why
60 min to allow capacitor bleed down
53
21. What are the three safety arrangements within the 84mm Illum F555 fuze
- Inertial safety - Centrifugal safety - Combined safety
54
22. Why are the raised range setting marks on the 84mm Illum F555 fuze
There is also raised range setting marks on the fuze for tactical identification
55
23. On the 84mm HEDP what is the fail safe feature on the fuze
If the escapement is released during transportation or handling prior to the driving plunger being pushed down, the rotor will be driven around 260 degrees to ensure the fuze remains safe.
56
24. What is the BD FFV 502 Fuze fitted to
84mm HEDP and 84mm ASM
57
25. What is the Recoilless Principle
If two equal weights can be fired in opposite directions at equal velocity the weapon will be recoilless
58
30. What is the operation of the Rocket 66 HEAT
- Trigger depressed - Primer struck - Flash through flexible flash tube - Propellant ignites - All burnt in launcher - On exit from launcher 8 fins deploy - Muzzle velocity 200ms - On setback leaves disengage - Rotor turns clockwise - Rate of rotation retarded by gear escapement - SAD 12m of flight - After setback arming will occur - Escapement winds down 0.67secs - Rotor aligns elect det M48 with block contacts - Percussion det with graze action cocked striker - Both dets with booster pellet - Fuzes armed - On impact piezo crystals crushed - Electric charged produce and transmitted to contact block - Rotation of shutter brings elec det in contact with contact block - Det initiates - Booster pellet initiates - Warhead charge initiates

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