AT SGT Theory of Design Flashcards
What are the 4 parts the make up SAA?
Cartridge case
Ignition system
Propellant charge
Projectile
What is small arms ammuniition?
Ammunition for weapons such as pistols, rifles and machine guns below 20mm.
What are the 4 factors considered in the design of SAA cartridges?
Role of the ammunition
Type of weapon
Projectile design
Ignition system
The 6 Methods of attaching a projectile to the cart case?
Press fit
Canneluring
Indenting
Stabbing
Coning
Crimping
What are the 4 cartridge case bases?
Rimmed
Rimless
Semi-rimmless
Belted cartridge case
What are the 3 ignition systems used in SAA?
Berdan - anvil Integral to case
Boxer - anvil separate to case
Rimfire
What are 4 methods of securing percussion primers?
Push fit
Ringing
Punch stabbing
Burring
What are the 2 types of SAA projectiles?
Solid and filled
What 4 permanent markings are commonly on SAA?
Manufacturers symbol
Year of manufacture
Calibre
Model number
A cartridge case for SAA must do 4 things?
Sufficiently elastic to expand to provide obturation
Contract to allow extraction
Resist corrosion
Strong enough to withstand transport and handling
What is a grenade?
A small explosive store designed to be projected by hand or a personal weapon. Special discharger or launchers may be used.
What are the 3 categories of grenade?
Hand thrown
Projected - Rifle or gun
Discharger - Weapon / Vehicle launcher
List 8 types of grenades?
HE anti Personnel
HEAT / Dual purpose
Smoke
Chemical / Irritant
Stun - Flash or Noise
Incendiary
Practice
Illuminating
What are the 5 components of a typical grenade?
Body
Filling
Fragmentation
Fuze cavity
Fuze
What are the difference between offensive and defencive grenades?
Offensive - Use blast to disorientate and stun
Defensive - Use Fragmentation to create a lethal zone
What 3 effects does reducing the firing pressure have on projected grenades?
Reduced recoil, muzzle velocity and range
Free fire rockets have 2 main components and one other required item?
Rocket Motor
Warhead
Launcher
What are the 2 types of propellants in FFRs?
Solid
Liquid
What is the normal type of nozzle for a FFR and it’s purpose?
The De Laval nozzle is a convergent-divergent type. It converts heat and pressure into kinetic energy.
What is the common warhead for shoulder fired rockets?
HEAT/shaped charge warheads
List 7 types of warheads are used on FFRs?
Nuclear
HE
Chemical (smoke)
Preformed fragments
Sub munitions
Terminally guided munitions
Practice munitions
What are the 3 factors that affect rocket accuracy?
Surface cross winds
Propellant burning rate
Launcher induced errors
What are 4 characteristics of free flight rocket motors?
Only use boost motors
Motor casing strong enough to withstand heat and pressure
Usually made of steel, some glass reinforced plastics
De Laval nozzle normally used - convergent-divergent
What are the 3 advantages of recoilless weapons?
No recoil
Low weight
Man portable
What are the 3 disadvantages of recoilless weapons?
Dust / Flash signature (BBDA)
Low velocity
Large propelling charge
What is the principle behind recoilless weapon operation?
To propel the projectile forward an equal force must be sent backwards so there is no recoil.
What is the BBDA on an 84mm?
60m to the rear, 820mils ESB (either side of the bore)
List the 9 84mm full munitions?
HE 441B
SMK 469B
HEDP 502
ASM 509
ILLUM 545C
HEAT 551
Practice TPT 65
Practice TPT 141
Practice TP 552
What are the 3 rates of fire of the M777A2?
Maximum 4rpm for 2 mins
Sustained 2rpm
After 30mins 1rpm or dictated by ETWD (electronic thermal warning device)
What is the effect of the 155mm HE M107 projectile?
Blast and fragmentation
What guidance system is used on the 155mm XM982 Excalibur projectile?
GPS
How many WP impregnated felt wedges are in the M825A1 WP 155mm projectile?
116
What is the overall body colour and markings on HE projectiles?
Olive drab with yellow markings
What are the 7 types of mortar fire?
Preparation
Covering
Defensive
Harassment
Counter battery
Smoke
Illuminating
What are the 4 characteristics of a mortar?
Smooth bore
no recoil mechanisum
Restricted to elevations over 800mils
Muzzle loaded
List the 5 ammunition types for 81mm mortars
HE - M889, M821
Illum - M853, M9769
Illum IR - M816
Smoke RP - M819
Prac - M879
What are the 3 methods of mine neutralisation?
Self-neutralisation
Self destruct
Remote Control
What are the 5 components of a mine?
Warhead
Sensor and fuze
Safety and arming unit
Power source
Case
What are 3 categories of anti personnel mines?
Pressure activated / direct contact
Omnidirectional fragmentation
Directional fragmentation
What are the 3 mine laying methods?
Hand
Mechanical
Scatterable
What are the 4 countermeasures to mines?
Hand breaching
Mechanical
Explosive breaching
Electromagnetic breaching
What are the 3 main mechanical mine breaching methods?
Rollers
Ploughs
Flails
What are the 4 common components of the 120mm smooth bore gun cartridge case?
Primer
Combustible cartridge case
Cartridge base and sealing assembly
Propellant
What are the 2 fuze settings on the M830A1 HEAT round?
A - proximity
G - impact
What is left after firing the Abrams CCC ammunition?
Steel base case and primer tube
