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AT Course_NE > Test 13 - Artillery > Flashcards

Test 13 - Artillery Flashcards

1
Q

What is the type of fill and weight for the main fill and supplementary charge for HE M795?

A

Main Fill: TNT – 10.8 kg

Supplementary Charge: TNT – 136g

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2
Q

What are the fuzes that are able to be used in the 155mm Projectiles.

A 
Prac M804A1
- PD M739A1
- ET M767A1
- MOFA M782
HE M1122
- PD M739A1
- ET M767A1
- MOFA M782
HE M107
- PD M739A1
- ET M767A1
- MOFA M782
HE M795
- PD M739A1
- ET M767A1
- MOFA M782
- MO PGK M1156
Smk WP M825 and Smk WP M825A1
- ET M762A1
Illum M485A2
- ET M762A1
SMART DM702A1 
- ET M762A1
Excalibur XM982
- ??
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3
Q

What is the main fill of the HE M107 with and without supplementary charge and the fill of the supp charge?

A
  • W/ Supp Charge: Comp B 6.985kg / Comp B 6.949kg
  • WO/ Supp Charge: Comp B 7.121 kg
  • Supp Charge: 136g TNT or Comp A3
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4
Q

What effect does the HE M107 produce at the target?

A

Blast and Frag (1950 fragments)

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5
Q

What is the effect (luminosity and burn time) produced by the 155mm Illuminating M485A2/A1 candle?

A

1,000,000 candela for 120 sec

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6
Q

What is the candle illuminate composition of M485A2/A1? (3)

A
  • Magnesium 48.5%
  • Sodium Nitrate 43.7%
  • Binder 7.8%
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7
Q

What is the M485A2/A1 illuminate canister made of?

A

Metal canister with four spin retarding spring fins

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8
Q

What does the M485A2/A1 canister nose component consist of?

A
  • Delay holder

- Secondary expelling charge

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9
Q

**Describe the operation of the M485A2 Illum from function during flight **

A
  • During Flight, When the time interval set on the mechanical or electrical time fuze is reached, the fuze functions and the Primary Expelling Charge is ignited.
  • Ignition of the expelling charge generates gas pressure and ignites the delay composition in the Delay Holder.
  • The gas pressure builds up until it is sufficient to cause the shear pins at the base of the projectile to fail.
  • Once the shear pins fail the contents of the projectile are ejected rearwards as a result of the internal gas pressure.
  • On being expelled from the projectile the Drogue Parachute Assembly deploys, bringing the complete internal assembly into a vertical plane.
  • The four spin retardant fins deploy, slowing down the rotation of the Illuminant Canister and Main Parachute Assembly.
  • After approximately eight seconds the delay composition burns through and ignites the Secondary Expelling Charge.
  • The secondary expelling charge ignites the main illuminant candle and expels the candle along with the main parachute.
  • The burning candle descends beneath the deployed main parachute whilst producing light (equivalent to 1,000,000 candela) in the visible spectrum for a nominal period of 120 seconds.
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10
Q

What is the main fill of the 155mm WP M825A1 and construction of the projectile body?

A
  • White Phosphorus – 5.78 kg (116 felt wedges)

- Forged Steel

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11
Q

What is the weight and type of burster charger and expulsion propellant charge of the M825A1?

A

Burster: Comp A5 – 21.2g
Expulsion: M10 – 51g

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12
Q

What effect is produced by the M825A1?

A

Smoke screen width of 125-250 metres, within 45 seconds, for 5 to 10 minutes

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13
Q

Label Charge bag and WP Diagram.

A 
Charge Bag:
- Igniter Pad
- Base Charge
- Charge 4 Increment
- Charge 5 Increment
- Tie Tape
- Tie
- Charge 7 Increment
- Charge 6 Increment
- Flash Reducer
WP:
- Ogive
- Delay Element
- Full Length Burster
- Body M483A1 (W/O Fiberglass Wrap)
- Fill Closure
- Domed Steel Base 1 Inch
- Plastic Insert
- Thin-walled Steel Canister
- Felt Wedges
- Full Length Burster
- Aluminium "X" ribs
- Expulsion Cup
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14
Q

What is the meaning of a bi-directional modular increment when regarding the M232A1 MACS?

A

This means the propelling bag can be loaded and initiated with either end facing forward

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15
Q

How many increments and what is their construction and colour in the M232A1 MACS system?

A
  • 5
  • tan coloured
  • coated in a NC-based combustible case
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16
Q

What is a single M232A1 charge bag comprised of?

A
  • Propellant – M31A2 (Triple base) – 2.23 kg
  • Igniter Bag – Black Powder – 9 grams
  • Centre Core – WC 864 Ball Powder – 27 grams
  • Combustible Case – Pyroxylin Plastic – 0.34 kg
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17
Q

How does the M232A1 charge operate on firing?

A
  • Flash from M82 primer ignites igniter bag
  • Igniter bag ignites the ball powder in the centre core
  • This ignites the main charge
  • Process repeats for the remainder of increments
  • Gases expand propelling the projectile
18
Q

What is the components and composition of the M4A2 White Bag?

A
  • Propellant – M1 Type I (5.9kg)
  • Igniter Pad – Clean Burning Igniter Powder (99.2g)
  • Flash Reducer Pad – Potassium Nitrate or Potassium Sulphate (28.4g)
19
Q

Where are flash reducing pads placed in the M4A2white bag and M3A1 Green bag arrangement?

A

White: Between charge 3 and 4
Green: Between 1 and 2, 4 and 5, end of charge 5

20
Q

What are the required conditions for arming of the PD M739A1 fuze?

A 
SQ:
- No Arm – 1050 rpm
- Arm – 1800 rpm
Delay:
- No Arm – 1075 rpm
- Arm – 2025 rpm
21
Q

Describe the operation of the Delay mode for the Fuze M739A1

A
  • When the fuze is set to Delay, the M99 Detonator reaction products are blocked from M55 Detonator by the S&A assembly.
  • The IDM provides a delayed initiation by measuring target penetration through a decrease in the deceleration.
  • The IDM requires rotational forces and specific deceleration forces to release the IDM firing pin.
    a. - On firing the spring loaded spin detents move outward under rotational loading.
    b. - This frees the inertia plunger to move forward against the load of the 25g creep spring.
    c. - An unbalanced detent lock rotates approximately 20° under rotational loading and prevents the spin detents from returning to their locked position.
    d. - On impacting the target an inertia plunger moves forward against the 25g creep spring.
    e. - The forward movement frees two balls which release a sleeve that is loaded with a 300g creep spring.
    f. - When projectile deceleration decreases to 300g (or less) the spring tension moves the sleeve aft which frees two other balls.
    g. - The movement of these balls releases the spring loaded firing pin.
    h. - If in the armed state the IDM firing pin impacts the M55 detonator in the S&A assembly which in turn initiates the booster.
22
Q

What are the arming requirements of the Fuze ET M767A1?

A 
Setback:
- No Arm – 800 g
- Arm – 1000 g
Rotation:
- No Arm – 900 rps
- Arm – 2100 rps
23
Q

When does the fuze M767A1 arm in ET mode and what settings are the time increments?

A
  • 50 ms before time set

- 0.5 to 199.9 seconds in 0.1 second intervals

24
Q

When does the fuze M767A1 arm in PD mode?

A

0.45 seconds after leaving the barrel

25
Q

How long is the battery life of the M767A1 and how many times can it be set?

A

15 days from activation, can be set unlimited number of times whilst battery is active

26
Q

What are the two methods of setting the M762A1/M767A1?

A
  • Inductively – Electronic Portable Inductive Artillery Fuze Setter (EPIAFS) contained within AS-PEFCS.
  • Manually – Rotating ogive by depressing selector and cocking button until the desired time shows in the crystal display (ogive may be rotated either clockwise or anti-clockwise).
27
Q

What are the operating modes of the MOFA M782?

A
  • Prox
  • ET
  • PD
  • PD Delay
28
Q

What is the only method of setting the MOFA M782?

A

Inductively by the Electronic Portable Inductive Artillery Fuze Setter (EPIAFS)

29
Q

What are the arming requirements of the M782?

A 
Setback:
- No arm – 30 g
- All arm – 40 g (but will relock without spin)
Rotation:
- No arm – 18 rps
- All Arm – 28 rps
30
Q

What is the mechanical safe arming distance for M782 MOFA?

A

62m

31
Q

When in proximity and electronic time mode when does electronic arming occur?

A

4 sec before the set time. Additionally the first 200m secs whilst the signal processor circuits stabilize.

32
Q

What are the actions on/from firing of the Fuze M782?

A
  • When the round is fired, the post-launch battery is activated and the microcomputer is reset.
  • The microcomputer loads the mission data to one of its’ registers, verifies that the data is valid and begins fuze timeout.
  • Mechanical arming of the fuze requires the release of two independent safety features within the S&A assembly.
  • Setback on launch moves the setback pin rearwards releasing the initial lock on the rotor, partially releasing the rotor.
  • Centrifugal force, generated by the spin of the fuze, moves two spin detents radially outwards, releasing the second lock on the rotor – thereby fully releasing the rotor.
  • The dynamic imbalance of the rotor, delayed by the runaway escapement, causes the rotor to rotate to the armed position aligning the M55 detonator in-line with the explosive train.
33
Q

Compositions of DM702A1 SMART?

A 
Warhead: Octol, 2200g
Delay: Delay Composition VS2/2, 0.18g
Detonator: DM1275 0.14g
Thermal Battery: Primer Cap AZH TV 23AF, 0.016g
Booster: Lead DM1492, 4.3g
Expulsion Charge: NC1055, 97g
34
Q

What are the 5 commands used by the Excalibur CAS (control actuator section) control software to communicate

A

a. Canard Position Command;
b. Built-in-Test (BIT) Command;
c. Battery Activation Command;
d. Canard Deploy Command; and
e. Reset CAS Command (Debug/Factory Usage Only).

35
Q

What are the 3 batteries in the XM982 Excalibur?

A
  • Datahold Battery
  • Electronics Battery
  • Actuator Battery
36
Q

What are the three components fo the sub munitions in the SMART DM702A1?

A
  • Orientation and stabilisation unit
  • Multi-mode sensor
  • Warhead containing the S&A Mechanism
37
Q

What is the fill of the Warhead of the DM702A1?

A

Main Charge: PBXN-9 5530g

Booster: PBXN-9 55g

38
Q

What are 2 modes for the Fuze M767A1?

A

ET and PD

39
Q

What are the components of the XM982?

A
  • Guidance, Navigation and Control (GNC) Section;
  • Payload Section; and
  • Base Assembly Section.
40
Q

What are the sections fo the XM982 Base assembly?

A
  • Inert base bleed and inert igniter;
  • Bearing assembly with Roll Component Clutch (RCC);
  • Eight curved fins;
  • Slipping driving band; and
  • Base Hood.
41
Q

What does the pyrotechnic delay do in the DM702A1

A
  • ignite thermal battery
  • allow various sensors to begin functioning
  • allows submunitions to arm
42
Q

What height is the self destruct for the DM702A1 submunitions?

A

20m

AT Course_NE (23 decks)

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