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AT Course > Theory of design > Flashcards

Theory of design Flashcards

1
Q

What is the definition of SAA?

A

Ammunition for weapons such as pistols, rifles, and machine guns below 20mm in calibre

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2
Q

What four main parts make up a small arms round?

A

Cartridge case
Ignition system
Propellant charge
Bullet

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3
Q

The contour of the cartridge case depends on what factors?

A

Role of the cartridge
Type of weapon
Projectile design
Ignition system

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4
Q

What are the four main types of cartridge case bases?

A

Rimmed
Rimless
Semi rimless
Belted rimless

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5
Q

What are the three types of ignition systems in SAA?

A

Integral anvil
Seperate anvil
Rimfire

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6
Q

What are the four methods of securing percussion primers to cart cases?

A

Press fit
Ringing
Burring
Punch stabbing

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7
Q

What are the two main categories that projectiles fit into?

A

Solid projectiles

Filled projectiles

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8
Q

Name six ways of securing projectiles to cart cases

A 
Press fitting
Canneluring
Indenting
Coning
Crimping
Stabbing
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9
Q

What are the four base markings found on SAA?

A

Manufacturers symbol
Year of manufacture
Calibre
Model number

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10
Q 
Colour coding for tips of SAA:
Black
Silver
Blue
Yellow
Red
Uncouloured
A 
Black - AP
Silver - API
Blue - Incendiary
Yellow - Observing
Red - Tracer
Uncoloured - Ball
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11
Q

How does a SAA round work?

A

Round goes in to the chamber. The bolt is locked to stop rearward movement of the case. The firing pin strikes the primer, the flame flashes through the flash holes to ignite the propellant. The propellant burns and builds up pressure and expands the cart case to provide rearward obturation. The bullet engages with the rifling and creates forward obturationThe bullet is held firmly in the cart case to ensure a high start pressure builds up before it moves up the barrel. Riffling in the barrel imparts spin. Gases are used to re-cycle auto and semi auto weapons.

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12
Q

Definition of a grenade

A

A small explosive store designed for projection by hand or from a personal weapon, special discharger or launcher

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13
Q

What are four types of payloads in a grenade?

A 
HE anti pers
HEAT
Smoke
Chemical or smoke
Flash or noise composition
Incendiary
Practice
Illuminating
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14
Q

What are the five main components of a typical grenade?

A 
Body
Filling
Fragmentation
Fuze cavity
Fuze
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15
Q

What are the two types of HE grenades?

A

Offensive

Defensive

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16
Q

What are the three means of delivery for grenades?

A

Hand thrown
Projected
Discharger

17
Q

What are the five components that make up a mine?

A

Warhead
Sensor and fuze
Safety and arming unit
Power source case

18
Q

What are the three categories of mines?

A

Anti Pers
Anti tank
Anti helicopter

19
Q

What are the three categories of AP mines?

A

Pressure/ direct contact
Omni-directional frag
Directional frag

20
Q

FFR are made up of 2 main sections and 1 other item, what are they?

A

Warhead including fuze
Motor including igniter combustion chamber fins and nozzle
The Launcher

21
Q

Types of FFR warheads

A 
Nuclear
HE
Chem
Preformed frag
Sub munitions
Terminally guided munitions
22
Q

What factors affect the accuracy of FFR

A

Surface cross winds
Propellant burn rate
Launcher induced errors

23
Q

Advantages of RCL?

A

No recoil
Low weight
Man portable

24
Q

State the principle of RCL

A

If two weights can be fired in opposite directions at equal velocity then the weapon will be recoilless

25
Q

Define a mortar

A

Closed metal tube designed to project a bomb into the air so that it follows a predetermined trajectory.

26
Q

What are the characteristics of a Mortar?

A

Smooth bore
No recoil system
restricted elevation above 800mils
Muzzle loaded

27
Q

Components of a mortar?

A

Base plate
Bipod
barrel
Sight

28
Q

Name four types of mortar fire

A

Preparation fire
Covering fire
Defensive fire
Harassing fire

29
Q

What should be worn when handling 120mm ammo?

A

Dry Cotton gloves

30
Q

what 2 fire control systems does the M777 have?

A

Optical fire control system

Digital fire control system

31
Q

What is left over when firing 120mm ammo?

A

Case base & seal assembly

32
Q

Rates of fire for arty

A

Max 4rpm for 2 mins
sustained 2rpm
after 30mins 1rpm determined by elec thermal warning device

AT Course (14 decks)

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