8. Design Flashcards

1
Q
  1. Definition of Small Arms (SAA)
A

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

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2
Q

Definition of Calibre

A

The diameter of the barrel of the weapon measured between opposing lands of the rifling

Can be Imperial or Metric

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3
Q

The complete round is made up of four main parts

A

Cartridge case
ignition system / primer
propellant charge
projectile

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4
Q

Requirements of the Cart case

A
  • Designed to hold the propellant charge,
  • incorporate the ignition system
  • retain the projectile
  • provide obturation
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5
Q

The design of the Cart case depends on what factors?

(TRIP)

xx

A

Type of weapon
Role of the ammunition
Ignition sytem
Projectile design

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6
Q

The Cart case must be what (4)

A

Sufficiently elastic to expand IOT provide obturation
contract to original size forextraction
resist corrosion
strong enough to withstand transportation and handling

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7
Q

Materials used for Cart cases?

A
Brass                (Copper/ Zinc 70/30)
        - Strength
        - Hardness
        - elasticity
        - Resistance to corrosion
Cupro NIckel    (Copper/Nickel 80/20)
Gilding Metal    (Copper/inc 90/10)
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8
Q

Why is a Soft Mouth for Cart case required? (3)

A

Expand as soon as pressure rises in the chamber
to establish an early seal
and prevent gas leakage

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9
Q

Why is a Hard base necessary on SAA?

A

Enable case to withstand internal pressure and rearward movement
Stresses applied by extractors

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10
Q

Why is the projectile to BE SECURED to the mouth? (3)

A

A seal against moisture
Prevent accidental removal
retention by the Cart case to allow gas pressure to build up

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11
Q

What are the methods to secure bullet to the Cart case? (6)

A
Press fit
Canneluring
Indenting
Stabbing
Coning
Crimping
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12
Q

Four types of Cart case bases?

A

Rimmed
Rimless
Semi-rimmed
Belted Rimless

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13
Q

What are 3 types of ignition systems?

A

Berdan (Anvil)
Boxer (anvil)
Rimfire

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14
Q

What is the method of igntion?

A

Usually relies on a striker impinging onto a cap containing a sensitive composition

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15
Q

Projectile design is governed by its role (5)

A
Target characteristics
Effect required
Max effective range
Ballistics
Type of weapon
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16
Q

Lead Alloy Projectiles

A
  • Lead and tin or Antinomy
  • Combination of Incendiary and tracer may be encountered
  • Combination projectiles are used in observing and spotter rounds and 5.56mm
  • Tracer composition is ignited when fired
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17
Q

Accuracy depends on achieving consistent MV. What are the influences? (4)

A
  • Loading exact quantites of propellant
  • Consistent burning
  • Separation of the projectile and Cart case at correct pressure
  • Achieving correct obturation
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18
Q

What are the characteristics of an ideal Round ? (7)

A
  • Lightweight
  • High MV
  • Good ballistic performance
  • Ability to penetrate body armour
  • Dump energy at a high enough transfer rate to incapacitate a human with desired wound criteria
  • Fit all types of weapons
  • Equally effective over engagement distances
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19
Q

What is tracer used for? (1)

A

To assist aim and indicate targets to other firers

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20
Q
What does each of the colour coding for projectile tips indicate? (6)
Black 
Silver
Blue
Yellow
Red 
Uncoloured
A
Black - AP
Silver - API
Blue - Incendiary
Yellow - Observing
Red - Tracer
Uncoloured - Ball
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21
Q

Permanent Marking on rounds

xx

A

Manufacture symbol
Year of Manufacture
Calibre
Model Number

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22
Q
  1. Grenade - Definition (3 parts)

xx

A
  • A small explosive store
  • PROJECTION by hand or a personal weapon.
  • a special discharger or launcher may be used
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23
Q

Grenade Payloads / types

A
  • HE (anti-pers)
  • HEAT and HEDP
  • Smoke (screen & signal)
  • Chemical or Irritant (CS, riot, rubber balls)
  • Flash or Noise (stun)
  • Incendiary (IEDD tool, initiator; red body)
  • Practice
  • Illuminating
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24
Q

Typical Components of a Grenade (5)

xx

A
Body
Filling
Fragmentation
Fuze Cavity
Fuze
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25
Fuze Components (6)
``` Safety Pin Fly-off lever Spring Striker Detonator Delay pellet ```
26
Grenades Offensive xx
Offensive: - Rely solely on the effect of blast for anti-personnel effect To cause any physical damage to a man, a burst must be very close to him or at least in a confined space Usual effect is to stun or disorientate a man so he is incapable of rational reaction for a short time
27
HE Anti-tank Grenades
Usually projected or dispersed Not usually hand Limited effect against tanks; more anti-vehicle
28
Grenade / Defensive xx
Defensive: These grenades are designed for use when the thrower is fully or partially protected The large lethal area is achieved using fragments projected at high velocity.
29
Grenade Design Categories What are normal means of delivery? xx
Hand Thrown Projected - Rifle launched / gun fired Discharger - Weapon/vehicle launched
30
Free Flight Rockets (FFR) are made up of 2 sections. What are they? xx
- Motor: (inc. the combustion chamber, fins and nozzle) -Warhead (incl. the fuze) Launcher is also required. Hand held platform or ground mounted
31
Characteristics of FFR Motors? (4) xx
- A casing which provides a combustion chamber in which the charge can burn - The motor casing must be strong enough to withstand the high temperature & pressures reached during combustion - Usually made of various steels; however, have been made from glass-reinforced plates - De Lavel nozzles normally used.
32
FFR Motors Consist of? (6)
``` Casing Combustion Chamber Propellant Igniter Nozzle Fins ```
33
Casing Propellant
Casing A structure used to hold the combustion chamber Propellant Solid propellants are preferred to liquid propellants
34
Igniter Nozzles
Igniter Essential for solid propellant ignition and usually electrical Nozzles Purpose is to change heat and pressure into kinetic energy
35
What is the main type of propellant used in rocket motors? xx
Solid
36
What are the types of Warheads that can be fitted to FFRs (6) xx
``` Nuclear HE Chemical (incl. smoke) Preformed Fragments Sub-munitions Terminally guided munitions. ```
37
Where are rocket fuzes usually located? What about newer fuzes?
Normally positioned inside the ballistic nose cone Newer fuzes incorporate electronics for fuzing
38
What are FFR Launchers for?
Support, transport and aim the rockets | In simpliest form they may be expendable
39
Thrust Misalignment
A condition caused when the thrust does not pass through the CoG and causes the rocket to PITCH or YAW
40
How do we overcome Thrust Alignment?
- Manufacturing to closer tolerances - Impart a slow rate of spin - Reduce motor burning time - Addition of fins
41
Factors Affecting Rocket Accuracy (3) xx
Surface Cross Winds Propellant burning rate Launcher induced errors
42
4. Principles of RCL
If 2 weights can be fired at equal velocity in opposite directions then the weapon will be recoiless
43
Disadvantages of RCL
- Low velocity - Flash dust signature - Large propelling charge (recoiless!)
44
Advantages of RCL
No recoil low weight man portable
45
Ammunition types *(84mm) (9)
``` HE HEAT HEDP Smoke Illum ASM (Anti-structure) PRAC 6.5mm sub-cal Drill ```
46
In the RCL system, the breech obturator is replaced by what?
The Venturi
47
5. Definition of a Mine
An explosive or other material, normally encased, designed to destroy or damage, vehicles, boats or aircraft, designed to wound, kill or otherwise incapacitate personnel. It may be detonated by the action of its victim by the passage of time, or by controlled means
48
What are the 5 components that make up a mine? xx
``` Warhead Sensor and fuze - Mechanical - Electronic Safety and Arming Unit Power Source Case ```
49
Mine effects categorised by type of obstacle: (4)
Disrupt Turn Fix Block
50
Operational Characteristics of Mines? (10)
``` Sensitivity Ease of Laying Resistance to Counter measures Delaying arming Sterilisation (neutralisation) Self-neutralisation Self-Destruct Remote Control Recording and marking ```
51
Sensitivity: Actuation Weights for pressure-operated fuzes for Anti-Pers and Anti-Vehicle (Anti-tank)
AP: 8-50kg AV: 200-250kg
52
3 Types of Warheads?
HE blast Shrapnel Shaped charges/EFP
53
Dependent upon their use, 4 groups/types of AT Mines ?(4)
- Pattern - Scatterable - Side Attack / Off-route - Area Defence Weapons
54
3 categories of Anti-Pers Mines? xx
Pressure activated Omni-directional Directional Fragmentation
55
Mine Laying Methods
``` Hand Mechanical Scatterable Mine Laying Systems - Vehicle - Artillery - Aircraft ```
56
Mine Counter Measures (3) xx
``` Hand breaching Explosive breaching Mechanical breaching - Flail - Roller - Plough ```
57
6. What is the in-service artillery
Howitzer, Towed, 155mm M777A2
58
Projectile HE M107.
# Fill Comp B ``` Tapered boat tail Fuzes - PD - MT - PROX ```
59
Projectile HE M795
``` TNT main fill Fuzes - PD - MT - ET - Multi-option ```
60
SMArt DM702A1
2 x sub-munitions | HMX; EFP warhead
61
Types of Projectiles for M777A2
``` HE M107 (blast and Frag) HE M795 (B&F) SMArt (Fire and Forget) HE XM982 (GPS guided, Fin stabilised) Illuminating M485A2 (Illuminating) WP M825A1 (WP - dense smoke screen) ```
62
Propellants.
M232A1 M231 M.
63
M1A1 Abrams MBT
120mm M256 Smoothbore
64
Capabilities of Armour
``` Firepower  Mobility  Protection  Networked Communication  Sensors ```
65
120mm natures - overview
- 120mm APFSDS-T KE-W A2 - 120mm TPCSDS-T M865 - 120mm CANISTER M1028 - 120mm HEAT-MP-T M830A1 - 120mm TP-T M831A1 - .05 Cal SLAP-T
66
What is to be used when handling 120mm tank ammunition? xx
Dry cotton gloves
67
What does CCC stand for? xx
Combustible Car case
68
What are the types of Fuzes for a Projectile - 155mm HE M795 - M107? xx
M107 - PD - MT - PROX M795 - PD - MT - ET - Multi-option
69
Max rate of fire of M777A2? xx
4 rounds per minute for 2 mins, then 2 every min
70
Types of Mortar fire xx
``` Preparation fire Covering fire Defensive fire Counter Battery fire Harassing fire Smoke (screening and blinding) Illuminating ```
71
Four main characteristics: xx
``` Smooth Bore  No Recoil Mechanism  Restricted to use at elevations above 800 mils  Muzzle loaded ```
72
There are 4 TYPES of 81mm mortar Ammunition in service?
``` HE  Smoke - WP and RP  Illumination - IR iIlumination and Visible Light  Training ```
73
Components of a Mortar
Barrel Baseplate Bipod Sight
74
81mm Mortar Ammunition
``` HE, illum illum IR Smk WP Training ```
75
60mm Mortar Ammunition
``` HE, illum illum IR Smk WP Prac ```
76
Difference bxn Single and double based propellants
double is 15-20% more energetic, but increased erosion
77
``` SAA Colour coding of projectile tips: Black Silver Blue Yellow Red Uncoloured ```
``` Black - AP Silver - API Blue - Incendiary Yellow - Observing Red - Tracer Uncoloured - Ball ```
78
Name the 8 types of grenades
- HE Anti-pers - HEAT/HEDP - Smoke - Chemical - Flash / Noise - Incendiary - Prac - Illuminating