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AT Course > Projectiles and cartridges > Flashcards

Projectiles and cartridges Flashcards

1
Q

What are the types of natural fibres?

A

Cellulose
Silk
Wool
Rubber

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2
Q

What are the 2 main types of plastics used?

A

Thermo plastic - can be reheated and re-shaped

Thermosetting plastic - incapable of being softened by heat

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3
Q

What are the 2 main types of metal defects?

A

Mechanical

Chemical

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4
Q

What are the types of corrosion?

A 
Rust (ferrous oxide)
aluminium oxidation
Mazak contamination
Cupric Azide
Zinc Exudation
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5
Q

What are the four filling techniques?

A

Casting
Pressing
Extruding
Pre-forming/ cocooning

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6
Q

What are the principles requirements of Tracer ammunition?

A

Luminosity
strength
consistency of performance
ease of ignition

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7
Q

What are the functions of the driving band?

A

To centre the projectile in the bore and impart spin
To prevent the forward escape of propellant gases
To assist in prevention of slip back of the projectile when loaded at high elevations

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8
Q

What are the requirements for a driving band?

A

No excessive pressure on the shell or barrel
Cater for change in bore diameter
Remain firmly attached to the projectile
Must not alter the ballistic shape of the projectile
cause no excessive friction or bore wear
simple to make and fit

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9
Q

What are the methods of preventing twisiting

A

wavy rib and knurling

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10
Q

What are slipping bands used for?

A

Slipping rings are designed to ensure that the spin
imparted by the weapons barrel does not reach a
rate that would influence the fin stabilisation of a
projectile or would reduce the effectiveness of a
hollow charge

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11
Q

How is separate ammunition loaded into a breech loaded system?

A

projectile and charge bags are loaded into chamber of the gun. The breech is closed to provide obturation.
a tube or primer is loaded into the breech

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12
Q

What are the 4 types of bagged charges?

A

Equal
Unequal
Stem and ring
Stem and segment

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13
Q

Two common RCL designs

A

Solid cart case with blow out rear disc

Perforated cart case system

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14
Q

Components of BL system

A

Tubes
Bagged charges
Projectile

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15
Q

Components of QF system?

A

Cart case and primer
Propelling charge
Projectile

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16
Q

What are the requirements of the cart case?

A
  • Protect contents
  • Easy loading and extracting
  • Provide efficient obturation
  • Able to house a primer
17
Q

Explain the blow out disc system

A

Pressure builds
Disk ruptures
Projectile propelled forward
Propellant gasses escape through breech hole and out Venturi

18
Q

Explain the Perforated cart case system

A

Prop gasses escapee through holes in cart case
into annular space
Out through Venturi

19
Q

What’s copper used for?

A 
Driving bands 
Detonators
Shape charged liners
Cart cases
SAA jackets
20
Q

3 tracer classifications

A

Tracer projectile
Tracer and igniter projectile
Integral tracer

21
Q

Methods of attaching cart cases to projectiles

A

Coning
Canneluring
Coming and canneluring

22
Q

3 methods of HE shell design

A

Cast
Forged
Extruded

23
Q

Classifications of projectiles?

A

Operational projectiles
Weapon functioning
Training projectiles

24
Q

Advantages of CCC

A
  • Everything loaded into chamber plays some part in ballistics
  • Reduced barrel wear
  • reduced cook off with low charges
  • less produce left over
25
Q

Why use brass?

A

Performs well in most equipment
Metallurgy and techniques are well known
- does not corrode to give hard abrasive particles

26
Q

Methods of sealing tracer

A

Brass or celluloid discs or cups
NG and carbamite
Bakelite discs

27
Q

Types of primers

A

Percussion

Electric - bridge wire, conducting cap

28
Q

Sup charges contained in metal provide what 3 main benefits?

A

Ease of removal
Setback movement eliminated
No explosive migration

29
Q

Define the term exploder

A

The components used for transmitting the impulse from th fuze or booster to the HE fill

30
Q

Define carrier projectile

A

Projectile body is used as a vehicle to deliver payload to target area.
The projectile itself plus little or no part in achieving the target effects

AT Course (14 decks)

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