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Mortars Knowledge > 81mm Mortar Weapon System > Flashcards

81mm Mortar Weapon System Flashcards

1
Q

What is the name of the barrel used on the 81mm

A

L16 A2

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2
Q

What is the weight of the L16 A2 barrel?

A

13kg

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3
Q

What are the training restrictions of the L16 A2?

A

The barrel is limited to 90 rounds at charge 6, it must then be allowed to cool for 35 minutes. N/A from charge 1 to 5.

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4
Q

What is the name of the bipod?

A

L5 A5

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5
Q

What is the weight of the L5 A5?

A

12.9kg

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6
Q

What is the elevation of the L5 A5?

A

800mils - 1515mils

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7
Q

What is the traversal range of the L5 A5?

A

200mils (100mils each side)

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8
Q

What is the weight of the base plate?

A

11.6kg

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9
Q

What is the diameter of the baseplate?

A

55cm

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10
Q

What oil is used for cleaning?

A

OX18 / OX24

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11
Q

What is the grease used?

A

XG 279

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12
Q

What is the weight in box of the C2 sight?

A

3.8kg

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13
Q

What is the field of view of the C2 sight?

A

180mils

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14
Q

What magnification is the C2 sight?

A

x1.7

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15
Q

By what does the periscope raise the sight line?

A

356mm

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16
Q

At what does barrel obstruction occur?

A

Between 4600 - 5900mils

17
Q

Three ways to overcome barrel obstruction?

A

Periscope
Rear aiming post
Offset

18
Q

When should we sight test?

A

Before live firing
Before ops
When accuracy is in doubt
After repairs to instruments/bipod

19
Q

What are the trilux safety rules?

A

Don’t intake gas
Don’t touch broken glass
Open windows and doors, turn off gas/flame heaters
Extinguish all naked flames and cigarettes
Inform medical officer and armourer immediately

20
Q

Aim of mortar fire

A

The aim of mortar fire is to support furemdly forces by killing the enemy, neutralise his fire and deny him use of the ground.

21
Q

Reason for adjusting bearing scales

A

The reason for adjusting bearing scales is so that the C2 sight reads the same grid bearing along which the barrel points.

22
Q

Aim of adjustment

A

The aim of adjustment is to obtain accurate charge, bearing and elevation to the target with the minimum expenditure of time and ammunition so effective fire can be brought to bear on that target.

23
Q

10 point check

A

Base plate socket has been correctly aligned.
The breach plug is in position and locked, and that the firing pin is upper most.
Barrel clamp is correctly positioned and locked. (On “soft” if a L5 A3)
Sights locked, bubbles level, elevation is at 1100 and periscope bracket is fitted.
Buffers central and about 200mm of elevation showing.
Leg locking hand wheel is tight.
Bipod feet are parallel with the line of fire.
Aiming post has been positioned correctly.
Muzzle covers on.
Ammo prepared properly.

24
Q

Wet weather precautions

A

Muzzle cover on.
Keep bore dry and clean.
Prepared ammo must be returned to the greenie tail fin first out of prevailing winds.
Cover mortar (poncho)
Check flash holes are clear of ice and water.

25
Q

Fire power characteristics (HALFABECA)

A

High rate of fire
Accuracy
Long time of flight
Flexibility
Ability to fire on obscure targets
Beating zone
Effects of damp
Consistency
Ammunition

26
Q

Deployment characteristics (Her majesty’s government values women)

A

High trajectory
Mobility
Ground
Vulnerability
Weight of stores

27
Q

Rules of observation (RSM wants men)

A

Remember time of flight.
Smoke where observation of HEA is difficult.
Measure corrections onto line with binos or hand angles; don’t guess.
Watch for fall of shot with naked eye then use binos/laser.
MKA formula.

28
Q

Reasons for adjustment (HAM with cheese)

A

Human error
Altitude Meteor
Wind
Charge temperature

29
Q

Methods of adjustment (BCD)

A

Bracketing
Direct
Creeping

30
Q

Considerations before adjustment (she wears little pink crotchless knickers)

A

Safety of friendly forces
Wind
Lines of fire
Problem targets
Commanders adjustment policy
K to target

31
Q

Method of adjustment

A

Bracketing
Creeping
Direct
Fall of shot mode

32
Q

Use of smoke (STRICT)

A

Smoke screen (NSS - normal smoke screen, 5 RFFE R4)
Target indication
Reference point
Incendiary
Casualty
Target adjustment

33
Q

Factors affecting smoke (WITH G)

A

Wind
Ideal weather (cool, damp, cloudy day with 6 - 15knts, 7 - 17 mph)
Temperature
Humidity
Ground

34
Q

Use of Illum

A

General
General surveillance
Co-ord illum
Harassment

35
Q

Selection of a mortar line (Pretty little girls always come home crying)

A

Protection
Location
Ground
Alternative positions
Communication
Hides
Concealment

Mortars Knowledge (2 decks)

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