Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Target Analysis > Tatget Analysis > Flashcards

Tatget Analysis Flashcards

1
Q

What is the definition of an explosion?

A

A nuclear, chemical or physical process leading to a sudden release of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

High explosives are split into two groups, what are they and give an example for each group?

A

Primary explosives- lead azide

Secondary explosives- COMP B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What factors affect the V of D of explosives?

A

Strength of detonators
Density of the charge
Charge diameter
Degree of confinement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Explain how burning to detonation occurs?

A

Occurs when there is an abrupt acceleration of the flame front until it becomes a shock wave

When explosives are confined in a tube and ignited at one end. The gas generated cannot escape

Pressure builds up the burning rate increases and pulses can be generated which may accelerate the building rate to sonic velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In your own words, explain rarefraction?

A

The area of low pressure immediately following the positive phase.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

In your own words explain reflection?

A

Reflection is when a blast wave hits an object and returns back in the opposite direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the advantages to a fuel air explosion?

A

Larger overpressures at greater then HE would provide

Requires little or no oxygen in the molecular structure therefore making a FAE explosion 3 to 5 times hotter then HE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In your own words explain the definition of blast?

A

A blast comes from a explosion
From the explosion gas and heat is produced
A shock wave comes from the centre of the explosion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the formula used for the probability product rate?

A

PK =PH X PR X PL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

List 3 levels of damage which an ammo designer may wish to achieve in regards to target analysis?

A

Destruction
Neutralisation
Disablement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

On the battlefield, people appear as many different targets. What factors affect their vulnerability and explain each of them?

A

Body armour, helmet PPE- if the personnel have body armour on or the type and what parts it covers.

The available cover- is the cover in the area that can be used for protection

Attitude- their presented area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the two energy sources employed in ammunition design. Briefly describe each below?

A

Kinetic energy- uses a solid shot which dissipates energy on impact to create penetration

Chemical energy- uses a chemical substance with a high V of D to create a shock wave or over pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Over pressure from a chemical energy source (blast) is one of the four basic techniques used in the attack of aircraft in flight. What are the other 3?

A

Fragmentation
Blast and fragmentation
Special kinetic energy missiles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Standard criteria for aircraft damage?

A

Kk-kill target immediate destruction
K-kill target destroyed in 10 secs
A-kill target destroyed in 5 mins
B-kill target disabled with in 5 hours
C-kill target abandons mission (mission abort)
E-kill target completes mission however requires maintenance before next flight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Effect does altitude have on a blast warhead?

A

Density
Attenuation
Miss distance
Altitude increases/warhead increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Cluster disc warheads are one type of attack available in the engagement of aircraft in flight, name 3 others?

A

Blast
Fragmentation
Blast and fragmentation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What % of fragmentation in an anti aircraft warhead is wasted?

A

80%

18
Q

How can a fragmentation warhead be made more efficient?

A

They can be made more efficient by arranging the fragments and HE so that the fragments are projected in a narrow beam or band in one chosen direction ( preferential fragmentation)

19
Q

7 Types of armour?

A 
Rolled homogeneous armour 
Spaced homogeneous armour
Face hardened 
Explosive reactive armour 
Ply 
Bar
Composite
20
Q

3 shot failures?

A

Barrelling
Shattering
Lateral stresses

21
Q

Explain shattering?

A

Hardness of a steel shot makes it brittle

On impact hoop stresses are set up in the nose of the shot

At high striking velocities the shot nose can fall under stresses and longitudinal cracks are formed

22
Q

Explain barrelling?

A

Direct compression failure in the shot material. The shot bellies at about mid point

Increase in cross sectional area and the shot fails to push through

Improved strength by a hardness gradient along the shot

Shot hardest at its tip and is soft at base

23
Q

Explain lateral bending?

A

At high angles of attack the shot is subjected to serve lateral stresses particularly its rear end

Reduced by increasing the toughness towards the rear end by fitting a toughened steel sheath over the rear end

24
Q

What is F-kill?

A

Fire power kill is disablement of the ordnance, crew or explosive ordnance of the target

25
Q

Types of behind armour effects?

A 
Spalling
Illumination 
Heat
Over pressure 
Fire
26
Q

In a combined kinetic/chemical energy attack, what problem arises in relation to the chemical energy portion of the round?

A

That the initiating device can with stand the initial forces of impact

27
Q

Ways of increasing penetration?

A 
Lengthening of barrel
Rocket assistance 
Improve steadiness of shot
Lengthen the projectile 
Use of segmented long rod penetrators
28
Q

Severity of a casualty or wound type is dependent on what 3 factors WRT energy transfer?

A

Tumbling/yawning reduce energy transfer

Rate of transfer of energy from projectile to target

The actual amount of energy transferred

The actual amount of energy transferred

29
Q

The ammunition designer can control the size of fragments obtained from a shell body by varying what design features?

A

The position of the fill in relation to the fragmentation

Wall thickness

The velocity of detonation of the main charge

The fragmentation material type

30
Q

A designer can control fragment velocity by varying what?

A

Amount of explosive behind wall and its V of D

The charge density and V of D

The density of the wall material

31
Q

Explain how HESH works?

A

The high explosive explosion on the armour plate creates a shock wave into the plate

The shock waves travel through the armour plate till it reaches the air pocket where the change in medium reflects the wave

The reflected shock waves tension stress over stresses the armour in the area of the rear face

32
Q

What is the point of initiation of HESH?

A

Base detonation

33
Q

What is reverse impact detonation?

A

Where the detonation occurs before the fuse has detonated the main fill. This will cause the blast to travel in the wrong direction

34
Q

In regards to external ballistics, how is air resistance reduced when designing a kinetic energy round?

A

High mass
High velocity
Aerodynamic design
Snail cross sectional area

35
Q

How to reduce spin on APFSDS?

A

Slipping band/ring to negate the effects of any rifling

36
Q

What forces are utilised to assist with discarding the sabot?

A

Residual gas pressure from firing

The momentum through the air will use the air resistance to remove the sabot

37
Q

Ratios applied to forms of fin stabilisation?

A

Spin- 7:1

Fin-15:1

38
Q

Factors that affect performance of a shapes charge?

A 
Cone diameter 
Shape of liner
Liner material 
Stand off distance 
Rate of spin
Uniformity of the fill
39
Q

Peak performance stand off distance of shape charge?

A

5 cone diameters

40
Q

Plate charge penetration of at least one cone diameters can be achieved at what distance?

A

1000 CD’s

Target Analysis (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions