81mm Mortar Weapon System Flashcards
What is the name of the barrel used on the 81mm
L16 A2
What is the weight of the L16 A2 barrel?
13kg
What are the training restrictions of the L16 A2?
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.
What is the name of the bipod?
L5 A5
What is the weight of the L5 A5?
12.9kg
What is the elevation of the L5 A5?
800mils - 1515mils
What is the traversal range of the L5 A5?
200mils (100mils each side)
What is the weight of the base plate?
11.6kg
What is the diameter of the baseplate?
55cm
What oil is used for cleaning?
OX18 / OX24
What is the grease used?
XG 279
What is the weight in box of the C2 sight?
3.8kg
What is the field of view of the C2 sight?
180mils
What magnification is the C2 sight?
x1.7
By what does the periscope raise the sight line?
356mm
At what does barrel obstruction occur?
Between 4600 - 5900mils
Three ways to overcome barrel obstruction?
Periscope
Rear aiming post
Offset
When should we sight test?
Before live firing
Before ops
When accuracy is in doubt
After repairs to instruments/bipod
What are the trilux safety rules?
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
Aim of mortar fire
The aim of mortar fire is to support furemdly forces by killing the enemy, neutralise his fire and deny him use of the ground.
Reason for adjusting bearing scales
The reason for adjusting bearing scales is so that the C2 sight reads the same grid bearing along which the barrel points.
Aim of adjustment
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.
10 point check
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.
Wet weather precautions
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.
Fire power characteristics (HALFABECA)
High rate of fire
Accuracy
Long time of flight
Flexibility
Ability to fire on obscure targets
Beating zone
Effects of damp
Consistency
Ammunition
Deployment characteristics (Her majesty’s government values women)
High trajectory
Mobility
Ground
Vulnerability
Weight of stores
Rules of observation (RSM wants men)
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.
Reasons for adjustment (HAM with cheese)
Human error
Altitude Meteor
Wind
Charge temperature
Methods of adjustment (BCD)
Bracketing
Direct
Creeping
Considerations before adjustment (she wears little pink crotchless knickers)
Safety of friendly forces
Wind
Lines of fire
Problem targets
Commanders adjustment policy
K to target
Method of adjustment
Bracketing
Creeping
Direct
Fall of shot mode
Use of smoke (STRICT)
Smoke screen (NSS - normal smoke screen, 5 RFFE R4)
Target indication
Reference point
Incendiary
Casualty
Target adjustment
Factors affecting smoke (WITH G)
Wind
Ideal weather (cool, damp, cloudy day with 6 - 15knts, 7 - 17 mph)
Temperature
Humidity
Ground
Use of Illum
General
General surveillance
Co-ord illum
Harassment
Selection of a mortar line (Pretty little girls always come home crying)
Protection
Location
Ground
Alternative positions
Communication
Hides
Concealment
