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Formative 15 Revision > Formative 15 Revision > Flashcards

Formative 15 Revision Flashcards

1
Q

If you discovered a UXO fitted with a PD M739A1 fuze, what would be your primary concern?

A

-A Cocked Striker

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2
Q

What projectile in service and recently out of service can the fuze PD M739A1 be fitted to?

A
  • 105mm HOW HE & WP

- 155mm HE

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3
Q

What are the safety arrangements of the M739A1 series fuze?

A
  • Firing pin held over SQ det by collapsible spt
  • Interrupter blocks flash hole between det and S&A assembly
  • M55 det in S&A rotor held out of alignment by setback pin and spinlock detents
  • Detents stop delay plunger from moving forward
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4
Q

What are the five sub assemblies of the M739A1 fuze?

A
  • Safety and arming
  • Setting sleeve
  • Crossbar and holder
  • Firing pin and detonator
  • Delay
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5
Q

What are the four modes of operation for the M782 MOFA?

A
  • Proximity
  • Electronic time
  • PD
  • PD Delay
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6
Q

Describe the arming sequency for the MOFA M782:

A

Electrical Arming

  • On setback a post launch battery is activated which loads the mission data and confirms data is valid
  • Timer starts for electrical arming of the fuze

Mechanical Arming

  • S&A are disabled when round is fired
  • Setback forces force setback pin rearwards
  • Centrifugal forces move spin detents outwards
  • Rotor now free to rotate under centrifugal force, retarded by escapement
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7
Q

What is the following for the MOFA M782 fuze:

  • Height of burst on prox?
  • Time increments for ET?
  • Delay time in PD Delay?
A
  • 7-9m HOB
  • 0.5s - 199.9 in 0.1s increments
  • 7ms nominal delay
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8
Q

MOFA M782 can only be used on what projectile and what charge?

A
  • 155mm HE M795 projectiles

- MACS M231 or M231A1

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9
Q

What are the 6 sub-assemblies for the M782 MOFA?

A
  • Radome
  • Electronics
  • Detonator delay
  • Battery
  • Booster
  • Safe and arm module
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10
Q

What are some considerations when transporting the M767A1 fuze?

A
  • Setting mark must be aligned with setting mark. misalignment indicates battery may have been previously activated.
  • Battery life of 15 days
  • Once energised fuze cannot be deactivated
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11
Q

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

A
  • Setback - 1000g

- Centrifugal - 2100rps

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12
Q

What are the authorised projectiles for the M762A1 and M767A1?

A

M762A1

  • Proj 155 Smoke WP M825A1
  • Proj 155mm ILLUM M485A2
  • Proj SMART DM702A1

M767A1

  • Proj 155mm HE M795
  • Proj 155mm HE M107
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13
Q

What are the authorised platforms for the M762A1 and M767A1?

A
  • 155mm M198 Howitzer towed

- 155mm M777A2 Howitzer towed

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14
Q

How can the fuze on the M762A1 and M767A1 be set?

A

-Manually or inductively to ET or PD

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15
Q

What is a booster in relation to a fuze?

A

-Device attached to the baser of a fuze incorporating a safety and arming mechanism designed to receive initial detonation wave and increase it to function a projectile

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16
Q

What is the booster M125A1 fitted to?

A
  • Fuze MTSQ M520A1

- Fuze PD M557

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17
Q

What is the safety arm stimuli for the fuze MTSQ M582A1?

A

Setback
-No arm 300g - Arm 600g
Spin
-No arm 16.7 rps - Arm 30rps

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18
Q

What is the difference between the M577A1/M577A1 VECP to the M582A1?

A

-Identical by design by M582A1 has a booster

19
Q

The MTSQ M582A1 should always be shipped in a safe mode, at what setting?

A

-Set in the safe mode, with the small triangle marked between 93.5 and 95.5 seconds

20
Q

For PD or SQ function on the MTSQ M582 A1 the fuze is required to be set at what setting?

A

98.0 secs

21
Q

What type of projectile is the MTSQ M577A1 used to initiate?

A

-105 and 155 carrier shells

22
Q

What type of projectile is the MTSQ M582A1 used to initiate?

A

-105 and 155 HE projectiles

23
Q

What does the FZ PROX M732 A2 eliminate?

A
  • Need for deep intrusion prox fuzes

- Removal of supplementary charges

24
Q

List the 5 sub-assemblies for the FZ PROX M732 A2

A
  • Power supple
  • Electronic timer
  • Safety and arming module
  • Oscillator
  • Amplifier
25
Q

What is the time setting for the FZ PROX M732 A2 between?

A

4-156 seconds in 2 second increments

26
Q

How is the battery activated during flight on the FZ PROX M732 A2?

A
  • Setback forces actuate cutters that open the battery ampoule releasing acid
  • Centrifugal forces disperse acid into cells activiating the battery
27
Q

What modes can the M732 be used in?

A
  • Proximity

- PD

28
Q

the S&A module on the M732 arms after how many calibre of air travel?

A

400

29
Q

What are the conventional natures of 155mm HOW ammunition currently in service?

A
  • HE M765
  • HE M107
  • ILLUM M485A2
  • WP M825A1
30
Q

Are the MACS propelling charges authorised to be mixed with M3A1 propelling charges in the M777A2?

A

No

31
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

32
Q

What zones can you fire green and white charge bags on?

A
  • Green authorised for 3-5 only (zones 1-5)

- White authorised 3-7 (zones 3-7)

33
Q

What is the NEQ of the Proj HE M107 and it’s supplementary charge?

A
  • 6.99kg COMP B

- 0.136kg COMP B or TNT

34
Q

What is the Filling of the Primer Percussion M82?

A

22GR of Black Powder

35
Q

Describe the operation of the Proj 155mm from fuze function to candle ejection/illumination

A
  • Interval time on mechanical or electrical time fuze is reached, fuze functions and primary expelling charge is ignited
  • Ignition generates gas pressure and ignites the delay holder on top of the canister
  • Gas pressure causes shear pins to fail and contents of projectile are ejected rearwards due to pressure
  • Drouge parachute deploys bringing internal assembly to a vertical plane.
  • Spin retardant fins on candle housing deploy, slowing rate of rotation
  • After approx 8 secs, delay composition burns through and ignites secondary expelling charge
  • Secondary expelling charge ignites candle and expells candle with a main parachute.
  • Candle burns for 120secs at 1,000,000 candela
36
Q

What is the authorised fuze for the 155mm SMART M702A1?

A

-Fuze ET M762A1

37
Q

When the submunitin on the SMART stabilises, what angle does it tilt?

A

30 degrees

38
Q

At what height does the submunition self destruct in the SMART?

A

-20m

39
Q

Each submunition in the SMART contains three major sub-components, what are they?

A
  • Orientation and stabilisation unit
  • Multi mode sensor
  • Warhead containg S&A mech
40
Q

What are the two variants of the Projectile 155mm HE XM982 Excalibur Block 1A-1?

A
  • Tactical projectile

- Tacitical/telemetry projectile

41
Q

What 3 barrteries are locatin the GNC unit?

A
  • Electronics
  • Actuator
  • Data hold
42
Q

The TTM antenna is only present on the TTM variant of the Projectile 155mm HE XM982 Excalibur, true or false?

A

True RATTGGGDMPH

43
Q

What components make up the Guidance and Navigation Unit?

A
  • Radome
  • Anti-Jam Module
  • Telemetry Module
  • Tactical Telemetry Antenna
  • GPS antennas
  • GPS receiver
  • Guidance and Navigation Unit shell
  • Data Hold Battery (DHB)
  • Mission Computer (MC)
  • Power Conditioning Unit (PCU)
  • Height of Burst (HOB) sensor
44
Q

What does EPIADS stand for?

A

Electonric Portable Inductive Artillery Fuze Setter

Formative 15 Revision (1 decks)

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