SUM 4 - Cartridge and Projectiles Flashcards
1
Q
Components that make up a breech load system
A
- Tubes / Primers
- Bagged Charge
- Projectile
2
Q
Types of quick fire cart systems and define the major difference an example of what they are
A
- Separate – PROJ loaded then CartCase charge adjusted loaded afterwards
- Semi-fixed – PROJ and Cart Case charge adjusted, mated and then loaded
- Fixed – PROJ fixed to CartCase loaded together
3
Q
Requirements for a driving band
A
- The requirements of driving bands are:
- 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, and
- Cause no excessive friction - bore wear
- Simple to make and fit
4
Q
Understand the operation of a cart case with a blowout disc
A
- Pressure builds, disc ruptures, projectile propelled forward
- Propellant gases escape through breech hole & out through venturi
5
Q
Explain base bleed
A
- Non-ballistic solution achieved by generating gases and filling the vacuum at the base of the shell during flight
6
Q
Explain rocket assist
A
- Rocket motor inserted in the base of projectile
- Activated after shot ejection
7
Q
Requirements of the cart case
A
- Protection of contents.
- Provide efficient obturation.
- Easy loading and extraction.
- Able to house a primer.
8
Q
Three ways to manufacture a shell
A
- Cast
- Forged
- Extruded
9
Q
Carrier definition
A
- Those in which the body is used as vehicle conveying a payload to the target
10
Q
3 benefits from the 1960 exploder system
A
- Ease of removal
- Setback movement eliminated
- No explosive migration, ie no explosive dust escapes the container
11
Q
What is brass made of?
A
- 70% copper 30% zinc
12
Q
4 types of bag charge ?
A
- equal
- un equal
- stem - ring
- stem - segment
13
Q
3 components that make up breech loaded ?
A
- Tube
- ## Bag charge
14
Q
why do we use brass
A
- Performs well in most equipment.
- Metallurgy and techniques are well know.
- Does not corrode to give hard abrasive particles.
15
Q
components of a cap
A
- Base
- Pole unit
- Cap
- Magazine
15
Q
types of corrosion
A
- Rust
- Aluminum oxide
15
Q
3 types of tracers
A
- Tracer Projectile
- Tracer and Igniter Projectile
- Integral Tracer
16
Q
4 filling techniques
A
- Casting;
- Pressing;
- Extruding
- Pre-forming / cocooning
17
Q
what dose a driving band do
A
- To centre projectile in bore and impart spin.
- To prevent the forward escape of propellant gases.
- To assist in prevention of slipback of the projectile when loaded at high elevations.
18
Q
how is rearward obturation achieved in Quick Fire systems.
A
Rearward obturation is provided by the Cart Case.
19
Q
Quick fire components
A
- Cart Case with Primer.
- Propelling Charge (can be Charge Bags ).
- Projectile.
20
Q
Breech loading components
A
- Tubes / Primers
- Bagged Charge
- Projectile
