SUM 3 - Target Analysis Flashcards
Factors that affect VOD
- charge in density
- charge diameter
- degree of confinement
- strength of the detonator
What is VOD
The rate, in meters per second at which the wave of detonation passes through an explosive substance. 1500-9000 m/s
what is burning to detonation
When the rate heats up so much it becomes a shockwave and results in detonation
Explain how refraction and reflection work
- Reflection - Reflection involves a change in direction of waves when they bounce off a barrier
- Refraction - Refraction of waves involves a change in the direction of waves as they pass from one medium to another.
List 3 levels of damage an ammo designer wish’s to achieve in target analysis
- Disablement
- Destruction
- Neutralisation
Understand and describe energy sources
- Kinetic energy – solid missile dissipates energy to impact requires no triggering device
- Chemical energy – a substance with a considerable potential energy which can liberate that energy when intended.
- Combination of both -
the standard criteria for aircraft damage ( codes )
- KK- kill – target immediate and catastrophic disintegration
- K - kill – destroyed in less than 10 sec
- A - kill – destroyed in less than 5 min
- B – kill – defeated in less than 5 hours
- C – Kill – mission abort
- E – kill – target can complete mission but requires repair
different types of attack on an aircraft in flight
- Over pressure blast
- Kinetic energy
- Special kinetic energy
- Shape charge
types of armour
- Rolled homogeneous armour ( RHA )
- Spaced armour
- Ply
- Face hardened
- Reactive
- Slat
- Composite
ways of increasing the penetration of armour
- Lengthening of barrel
- Rocket assist
- Improve steadiness of shot
Attack on pers 3 factors in regards to energy transfer
- Fragment mass and velocity
- Fragment cross sectional area
- Stability of the fragment
How an ammo designer controls the size of frag from a shell
- Case material and its mechanical properties
- Thickness of the wall
- Quantity of explosives and its position in relation to the frag case
- VOD of the explosive
Understand how hesh works and its effects
- Munitio hits the armour squashing the nose a base fuse is functioned causing an explosion. Shockwaves ripple back and forth in the armour causing a scab to form on the other side, this peels off and flys around the destroying pers on the other side.
Reverse impact detonation definition
- When the explosive fill detonates from impact before the fuze can initiate detonation from the rear causes shock wave to form in the wrong direction
Kinetic energy attack on armour how is air resistance reduced when designing a kinetic round
- a small cross sectional area. Mass and velocity contribute equally to its momentum
Factors that would affect the performance of a shape charge
- cone diameter
- shape of liner
- liner material
- stand off
- rate of spin
what is Figure of insensitivity
- A relative number based on the ability of an explosive to withstand stimuli
what is Brisance
- Shattering affect
3 Rapid expanding gasses
- Physical
- Chemical
- Nuclear
Explosive shock phase
- Positive – push
- Negative – pull
- Result is chaos
Explosion definition
- An explosion is the violent and rapid decomposition of energetic materials to produce heat and gas which leads to violent pressure rupturing
Tank damage assessment
- M – Mobility kill
- F – Firepower kill
- K – Completely Destroyed
Blast Phases
- Shock front
- Positive pressure phase
- Negative pressure phase
3 primary blast effects
- Blast
- Heat
- frag
Advantage of Fuel Air Explosion ( FAE )
Require little to no oxygen in the molecular struscure therefor FAE is 3-5 times hotter that HE
FAE Fuels
- Butane
- Acetylene
- Kerosene
- Aluminium
- Etheleyne oxide
- Propylene oxide
