Test Four Flashcards
What are the different types of corrosion
- Rust
- Aluminum oxidisation
- Muzak contamination
- Zinc exudation
- Cupourus oxide contamination
What are the different types of metal defects
- Chemical
2. Mechanical
What are the 4 different types of filling used in projos
- Casting
- Pressing
- Extruding
- Preforming/concooning
What are the 3 methods of casting explosinves
- Pouring
- Creaming
- Liquid and biscuits
Driving bands are one use of copper in ammo where the rest
- SAA jackets
- Shape charge liners
- Dets
- Cart cases (brass)
What is brass?
70% copper
30% zinc
What are 3 different types of QF cart cases/systems
Separate
Semi fixed
Fixed
What is AO and BO
AO = ammunition obutration cart case seals BO = breach seals obutration
What are the different ways too ignite tracers
Direct ignition
Propellant ignition
How are cart cases stuck to projos
Conning
Cannularing
Combo of Cannularing and conning
Why are driving bands used
Center projectile in the bore
Obturation
Stops slip back when rammed in barrel at high angle
How are driving bands stuck on projos
Knurling
Wavey ribs
What are 2 types of primers
Percussion
Electric
What are 2 types of recolis rifle rounds
Blow out disc
Perforated cart case (106 recolis rifle, chinease recoiless)
How are promo shells made
Casting
Forging
Extruding
What is in a conducting cap electric and how’s it work
- Base
- Pole
- Cap
- Magazine
Electric current passed up pole to cap and passed through mixture causing heating and ignition
What are the classifications of tracers
Tracer projectile Tracer and igniter projectile (self distruct) Integral tracer (small arms)
The 1960s explorer system had 3 main benifets what are they
Ease of removal
Setback forces eliminated
No migration of explosive.
Requirments of a cart case
Holds the primer
Provides obturation
Protection of contents
Ease of extraction
What is a non permanent seal
Luting
Name the types of natural fibres which may be used with ammunition explosives
Cellulose
Silk
Wool
Rubber
What are the types of bagged charges
Equal cylinder
Steam and ring
Unequal cylinder
Steam and segmented
What are the types of QF cart systems?
Fixed cart and promo joined
Semi fixed parts mated before ramming
Seperate mated in gun
What are the types of metal defects
Chemical
Mechanical
Why do we use brass in cart cases
Does not corrode and give abrasive particals
Performs well in most equipment
Know it’s mettelurgy and techniques are well know
What advantage does a combustible cart case offer
All helps ballistics
Attaching cart case too projo
Cone
Cannaluring
Cone - cannaluring
How are tracers ignited
Direct
Propellants
Methods of sealing tracer
Brass or celluloid discs
Nitroglycerin and carbamite
Bakelite discs
How are tracers fitted to projectiles
Externally to the base
Internally to the spigot
Grub screwed passing through tracer body
Design requirements of driving band
…
What are the classifications of weapon shells
Operational
Weapon functioning/inspection
Training
What are the four parts in a conducting caps
Base, pole unit, cap, magazine
What are the design requirements for driving bands
Must not alter ballistics
No excessive friction in the bore
Must remain attached
Simple to fit
