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AmmoTech > DS Artillery > Flashcards

DS Artillery Flashcards

1
Q

Projectile 155mm HE M107 Functioning?

A

ON FIRING
- Burning propellant generates rapidly expanding gases which act on base of projectile
- Projectile moves forward forcing the driving band to engage with rifling
- Setback and centrifugal forces commence the fuze arming sequence
DURING FLIGHT
- Arming of the fuze occurs
TERMINAL ACTIONS
- Fuze functions on sensing appropriate stimuli
- Fuze explosive output functions supplementary charge
- Main charge functions
- On detonation projectile generates approximately 1950 fragments

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2
Q

Projectile 155mm HE M1122

Tab Data

  • Fill
  • Main Explosive Fill
  • Supplementary Charge
  • NEQ(kg/1000)
A

Tab Data

  • Inert Fill High Density Concrete (with 6.5mm thick layer of hot melt asphalt.)
  • Main Explosive Fill IMX 101 1.134kg
  • Supp Charge PBXN-9 0.15kg
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3
Q

Projectile 155mm HE M1122

What role is it designed for?

Origin of shell body.

What is the M1122 ballistically similar to?

A
  • designed as a cheaper ammunition for training. No blast or fragmentation in design.
  • Shell Body is a modified M483A1 DPICM
  • Ballistic properties of 155mm HE M795
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4
Q

PROJ 155MM SMOKE WHITE PHOSPHORUS M825A1

Label the Smoke Canister Payload. - diagram

How many WP Wedges?

A

Thin walled steel canister
See diagram
 116 WP Wedges (29 in each quadrant)

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5
Q

.PROJ 155MM SMOKE WHITE PHOSPHORUS M825A1

How long to establish the smoke screen; what is the width achieved and how long does it last?

A
  • The smoke screen establishes in-less than 45 sec
  • width of 125-250 m
  • lasts for 5-10 min
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6
Q

PROJECTILE 155MM SMART DM702A1

Each submunition contains three major sub components. What are they?

A 
Two submunitions containing:

-  the orientation and stabilisation unit,

-  the multi mode sensor, and

-  the warhead containing the Safety and Arming
mechanism (S&A).
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7
Q

PROJECTILE 155MM SMART DM702A1

At what angle does a sub-munition fly?

When does it self destruct?

A

Angle of 30 degrees

Self destruct at 20m, or when voltage from the energy supply falls below specified level.

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8
Q

What is the Authorised fuze for the 155mm

Smart M702A1

A

Fuze ET M762A1

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9
Q

The Projectile 155mm HE XM982 Excalibur

Block 1A-1 consists of three MAIN sections?

A
  • Guidance, Navigation, and Control Section (GNC);
  • Payload Section
  • Base Assembly Section.
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10
Q

What are the two variants of the Projectile

155mm HE XM982 Excalibur Block 1A-1?

A
  • the tactical projectile and

- the tactical / telemetry (TTM) projectile.

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11
Q

155mm HE XM982 Excalibur Block 1A-

what 3 batteries are located in the GNC Unit?

A 
Electronics Battery

Actuator Battery

Data Hold Battery
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12
Q

155mm HE XM982 Excalibur Block 1A

The TTM antenna is only present on the TTM
variant of the Projectile 155mm HE XM982
Excalibur. True or False?

A

True

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13
Q

What components make up the Guidance and Navigation Unit?

A
  • Radome
  • Height of Burst (HOB) sensor
  • GPS antennas
  • Guidance and Navigation Unit shell
  • Data Hold Battery (DHB)
  • Mission Computer (MC)
  • GPS receiver
  • Power Conditioning Unit (PCU)
  • Telemetry Module
  • Tactical Telemetry Antenna
  • Anti Jam Module
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14
Q

What are the three selectable set-modes for the FSA?

Fuze Safe & Arming Device

A 
The FSA has three selectable set modes:

Proximity (Airburst) 500µsec

Point Detonation

Point Detonation with Delay 8.5 +/ 0.5 msec
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15
Q

Proj 155mm HE XM982 Excalibur Block 1A-1
What is the composition and NEQ for:

Main charge
Booster

A

PBXN-9 HMX 5530g

HMX 55g

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16
Q

FUZE ELECTRONIC TIME (ET) M767A1 and M762A1.

What is the difference?

A

Are identical except the ET M767A1 incorporates a booster

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17
Q

FUZE ELECTRONIC TIME (ET) M767A1
Basic data:

  • battery life
  • fuze settings; how set
  • ET setting (in time)
    When does PD mode set
A
  • 15 days
  • Fuze can be set manually or inductively to ET or PD
  • 05 to 199.9 sec (0.1 sec intervals)
  • 0.45 sec after barrel exit
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18
Q

What are the 3 MAIN components of the fuze

FUZE ELECTRONIC TIME (ET) M767A1

A
  • Ogive Assembly
  • Fuze Assembly
  • End cap Assembly
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19
Q

What stimuli and how much is required to
arm the M762A1 7 M767A1?

FUZE ELECTRONIC TIME (ET) M767A1

A

Setback 1000g

Centrifugal 2100rps

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20
Q

What are the four modes of operation?

Fuze MOFA M782?

A
  • Proximity
  • Electronic time
  • Point Detonating
  • PD Delay
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21
Q

Describe the mechanical arming sequence for the

Fuze MOFA M782?

A

Mechanical arming

- Safety and Arming (S&A) are disabled when the round is fired.
- Setback forces force Setback Pin rearward
- Centrifugal forces move spin detents outward
- Rotor now free to rotate under centrifugal force,
retarded by escapement.

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22
Q

Delay time in PD Delay mode?
Height of burst when set to Prox?
Fuze MOFA M782

A
  • 7millisec nominal delay

- 7m to 9m HOB

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23
Q

What is the only method of setting the M782?

A

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

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24
Q

What are the arming requirements of the M782?

Setback
Rotation

A 
Setback
- No arm – 30 g
- All arm – 40 g (but will relock without spin)
Rotation
- No arm – 18 rps
- All Arm – 28 rps
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25
Q

What is the mechanical safe arming distance?

Fuze MOFA M782

A

62 m

26
Q

When in proximity and electronic time mode when does electronic arming occur?
Fuze MOFA M782

A

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

27
Q

What are the required conditions for arming of the

Fuze Point Detonating M739A1/M739A1 TR1/ M739A1 with PBXN-5 booster?

A 
SQ
- No Arm – 1050 rpm
- Arm – 1800 rpm
Delay
- No Arm – 1075 rpm
- Arm – 2025 rpm
28
Q

What is the difference between the 3 variants of the fuzes, mentioned:
Fuze Point Detonating M739A1/M739A1 TR1/ M739A1 with PBXN-5 booster?

A

A change in the booster composition

29
Q

M1156 PGK uses the same SAI unit as what other fuze?

A

Uses the same S&A system as ET Fuze M762A1

30
Q

Chge Prop M3A1 Green

A

Propellant
- M1 Type2 2.57kg
Igniter Pad
- dyed red

31
Q

Chge Prop M4A2 White

Propellant type and weight?

A 
Containing an approximate total of 5.9kg of
M1 propellant (Single base)
32
Q

What does “MACS” expand to?

A

Modular Artillery Charge System

33
Q

What is the meaning of a bi-directional modular increment?

M232A1 MACS

A

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

34
Q

How many increments are there in the MACS system?

M232A1 MACS

A

5 tan coloured, coated in a nitrocellulose-based combustible case

35
Q

What is a single charge bag comprised of?

M232A1 MACS

A

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

36
Q

How does the MACS charge operate on firing?

M232A1 MACS

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
37
Q

Q

What are the conventional natures of 155MM HOW ammunition currently used in Australian Service?

A

A

  • HE M795 HE M107
  • illum M485A2
  • WP M825A1
38
Q

Projectiles and their compatible fuzes

A

.

39
Q

Functioning in flight of 155mm Illum M845A2 from fuze armed (not about the fuze)

A

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.

Post Expulsion.
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.

40
Q

SMArt round:
How does the pyrotechnic delay initiate?
What does it activate in turn?
At what angle does the submunition tilt afterwards?

A
  • The opening of the submunition despin flaps initiates a pyrotechnic delay
  • which, in turn ignites the thermal battery allowing the various sensors to begin functioning and submunition to arm.
  • The main parachute deploys and the submunition stabilises and tilts to an angle of 30°.
41
Q

What are the Authorised Fuzes used in the ADF

for the 155mm Natures?

A 
M107 HE
Fuze; M739A1, M582A1, M732A1

M795 HE
Fuze; M767A1 ET, M782 Multi Option

M825A1 Smk WP
Fuze; M762A1

M485A2 Illum
Fuze; M577A1, M762A1
42
Q

ET M767A1 Fuze: How it can be set?

A

.

43
Q

Label the M4A2 White Charge bags

A 
Igniter Pad
Base Charge
Flash Reducer
Charge 4 Increment
Charge 5 Increment
Charge 6 Increment
Charge 7 Increment
Tie tape
Tie
44
Q

MO M782 Fuze: Actions on/from firing

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 (2) 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 (2) 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.
45
Q

MO M782 Fuze: Actions on firing - Explosive Train

A 
Detonator, Electric M100
→
Detonator,Stab M55
→
LeadPA 508
→
Booster
46
Q

What are the compatible fuzes for 155mm HE M107 and M1122?

A
  • ET M767A1
  • MOFA M782
  • PD M739A1 w/ PBXN-5 Booster
47
Q

What are the compatible fuzes for 155mm HE M795?

A
  • ET M767A1
  • MOFA M782
  • PD M739A1 w/ PBXN-5 Booster
  • MO PGK M1156 (PBXW-14 Booster)
48
Q

What are the compatible fuzes for 155mm Illum M485A1?

A
  • Fuze MTSQ M577A1 VECP

- Fuze ET M762A1

49
Q

What is the compatible fuze for 155mm Smoke White Phos M825A1?

A

Fuze Electronic Time (ET) M762A1.

50
Q

Describe the functions of the delay module for the Fuze PD M739A1?

A
  • Provides fuze initiation delay based upon the completion of mechanical actions caused by the projectile’s deceleration and will function immediately after passing through the target

Function occurs when a spring loaded firing pin is released

51
Q

How can the fuze be set?

ET M767A1

A

manually or inductively to:
(ET) mode
(PD) mode

52
Q

What are the components of the Excalibur?

A

Base assembly, attachments, etc

53
Q

Primer Percussion M82

What is the base called,

what seals the base and

Type and amount of propellant

A

Extraction flange

Copper alloy container cup

NEQ 1.43

black powder

54
Q

Height of Burst (HOB) - When does the MC (mission computer) activate the HOB sensor?

At what height does the submunition selfdestruct
if no target is detected

Proj 155mm SMArt DM702A1

A
  • 3.5 seconds before impact

- 20m

55
Q

M739A1 Fuze; Impact Delay Module (IDM)

List the functions? (5)

A
  • Provides fuze initiation delay
  • Functions immediately after passing through the
    target.
  • Function occurs when a spring loaded firing pin is
    released.
  • There are no explosive components contained
    within the IDM.
56
Q

Can Proj 155mm HE M107 be fired on M232A1 MACS Charge 5?

A

No, but M795 can

57
Q

Proj 155mm HE M795 Tab Data:

  • Description of body
  • Main fill type and qty
  • Supp Charge
A
  • Body: 36kg High frag steel forged body
  • Main: TNT - 10.80kg
  • Supp: 0.136kg TNT
58
Q

Illum composition

A

Magnesium 48.5%
Sodium Nitrate 43.7%
Binder 7.8%

59
Q

The Fuze MOFA M762 is armed when:

A

400 calibres or 62 metres from the barrel

60
Q

What do canard covers do on the PGK M1156..?

A

Protect the canards
Protects the user
Enable programming of the PGK

61
Q

PGK consists of what parts? (7)

A

a. M762A1 Safe and Arm (S&A) Module
b. Guidance Navigation and Control (GNC) System
c. Canards
d. Firing Train
e. Power Source
f. GPS Antenna
g. Radome and Proximity Sensor

62
Q

Charge Propelling M232A1 MACS
Propellant
Igniter Bag
Centre Core

A

M31A2 Triple Base 2.23kg
Black Powder 9g
WC864 Ball Powder 27g

AmmoTech (41 decks)

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