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Mortars > Service Ammunition > Flashcards

Service Ammunition Flashcards

1
Q

Name 3 types of ammunition

A
  1. HE
  2. WP
  3. Illum (White/IR)
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2
Q

What is the lethal radius of a HE round?

A

40m

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3
Q

What is the casualty radius of a HE round?

A

190m

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4
Q

What ground conditions can effect a HE round when it explodes?

A

Wet or Dry

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5
Q

What fuse is a HE round fitted with?

A

L127A3/4

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6
Q

Where is the fuse on a mortar round?

A

Silver bit at the top

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7
Q

Colour of a HE round and stencil writing?

A

Deep Broze Green and Yellow Stencil Writing

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8
Q

How heavy is a HE round?

A

4.5 kg

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9
Q

Does the HE round have a discarded Obturating Ring?

A

Yes

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10
Q

How much RDX TNT mix does a HE round have in it?

A

0.733kg

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11
Q

Name 3 characteristics of the tail fin

A
  1. Centre tube
  2. Primary cartridge
  3. Flash Holes
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12
Q

Two types of impact of the L127A3/A4 fuse

A

Super Quick (SQ) or Slight Delay (0.05) Sec

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13
Q

What distance does the L127 A3/4 round arm its self?

A

73-292m

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14
Q

How far does the armoured striker pertrude?

A

4mm

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15
Q

How much does a Brown Ammo Box of HE weigh?

A

32.8kg

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16
Q

How much does a greeny of HE weigh?

A

11.8kg

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17
Q

What fuse is a WP round fitted with?

A

L127A3/A4

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18
Q

Name the identifying features of a WP round

A

Has a small step to identify at night, light green in colour, red hazard band and yellow stencil and discarded Obturating ring

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19
Q

How much does a WP round weigh?

A

4.5kg

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20
Q

How much does a brown ammo box of WP weigh?

A

33.2kg

21
Q

What is the weight of a WP greeny

A

11.8kg

22
Q

There are 5 WP saftey rules. Name some

A
  1. WP must be checked regularly for leaks
  2. Done leave in direct sunlight, provide shade
  3. WP Must be stacked seperate
  4. Provide shelter sheet, must be raised for ventilation
  5. Any unpacked rounds that are dripped, must be put to one side and destroyed
23
Q

What is the range of the Illum L54A1 round?

A

400-4800m

24
Q

What candle power is the Illum round equivalent to?

A

1,000,000

25
Q

Burn time of Illum?

A

33 seconds

26
Q

What the the burst height of Illum?

A

500m

27
Q

How far does the Illum round light up?

A

400m

28
Q

What is the rate of decent for Illum?

A

3.7mps

29
Q

What fuse does Illum use?

A

DM93 Fuse

30
Q

How heavy is an Illum round?

A

4.6kg

31
Q

What is the colour, and writing of the Illum round.

A

White and Black Stencil

32
Q

What are the two main difference between a L54A1 Illum round vs a L58A1 IR Illum?

A

2 minute burn time and black band around the round

33
Q

What rounds use the DM 93(M) fuse?

A

Illum and WP

34
Q

How heavy is the brown ammo box of Illum?

A

35kg

35
Q

How heavy is an Illum greeny?

A

12.3kg

36
Q

What type of fuse does the M73A1 have?

A

Electrical and Mechanical Proximity Fuse

37
Q

What is the burst height of the M73A1 fuse?

A

4.2m

38
Q

How do you set the M73A1 Fuse?

A

By hand

39
Q

What is the M73A1 Proxy Burst Height?

A

6081mm

40
Q

Is there a saftey on the M73A1 Fuse?

A

No safety fitted

41
Q

What shouldn’t you do to the M73A1 round?

A

Remove the rubber cap

42
Q

Name 4 characteristics of the primary charge?

A
  1. Aluminium tube
  2. Waterproof
  3. Firing Cap at the bottom (is fully enclosed)
  4. Tail Fins
43
Q

3 things you look for with charge selection

A
  1. It’s a MK4 Charge System (UK)
  2. Has 6 Augmenting Cartridges
  3. Is serial numbered to the ammunition nature
44
Q

Explain the action on firing

A
  1. The round slides down the tube under its own weight
  2. The primary charge hits the firing pin
  3. The flash passes through the flash holes and ignites the augmenting cartridges
  4. These burn rapidly and causes gasses that push the round out of the barrel
45
Q

Name the characteristics of a L37/L38 drill round

A

Dark Blue in colour, White stencil and says Inert primary Cartridge

46
Q

HOW DO YOU RECONDITION A ROUND AT THE END OF FIRING?

A
  • Check saftey pin is in position
  • If it has been removed, place for destruction
  • Don’t re-pin
47
Q

How do you recondition a fuse

A
  • Must be set to SQ or S
  • On a M734A1 round it must be set to 6081 prox
48
Q

What is the magnification of a C2 sight?

A

1.7x magnification

49
Q

What is the field of view for a C2 sight

A

180mils

Mortars (2 decks)

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