underwater weapons and pyrotechnics Flashcards
what are the depth charge handling procedures
- depth charge have thin skin
- before handling check for extrusion and exudation
- fittted depth charges must be kept apart from unfitted
what are the three main units a depth charge is made up of?
Case - contians main explosive
Fuze - initiates the main charge
Tail - arming device
what does fitted and unfitted mean
FITTED
fitted means the activity of assempling armament stores and components to constitute a complete weapon
UNFITTED
process of disassembling a complete weapon
what are the operational requirments of a air launched depth charge
- able to stand up to handling
- can be attached to aircraft and safe carriage
- capable of live or safe release
- explode at a predetermined depth
what what makes up the fuze
a valve unit, a pistol unit, a detonator placer assembly and a primer
how are the different variants of the depth charge ID
- warshot - deep bronze green with 2 golden yellow bands
- drill - oxford blue with unpainted top
- practice - saxe blue
- Fuze DC N1 - self colourd with golden yellow band
- Fuze DC N1 (drill) - dark grey with DC N1 DRILL marked in black on body
- Fuze, DC N1 (dummy) - connecting tube being painted saxe blue with the letters PRAC in white
explain the operation of a DC in live release
- live release from A/C pulls saftey wire in tail out by the arming lanyard against the tension of the arming spring
- while in the air, the tail driver sping rotates the fuze arming spindle, closing the fuze rubber
- when it enters the water a quarter of the detonation depth the twin shuttered detonator placer operates. this alaigns the explosive train
- as the DC sinks the hydrostatic pressure acting on the W-shaped diaphragm seperates the two sleeves, compressing the striker until the ball bearing is free, this unlocks the striker releasing the spring energy and causing the striker to hit the detonator initiating the explosive train
explain the operation of the depth charge in safe release
- DC released in safe condition, this will not cause the safety wire to be released from the tail and prevent the arming plate from driving the arming spindle and fork
- the rubber seated valve will remain open
- because the valve is open there will be a flooding of the fuze and an equal pressure created on both sides of the W-shape, the spring wont rise the train wont align and the detonator filling will be flooded with water preventing detonation
what are the acceptance checks of the DC mk 11 MOD 3
- weapon has been correctly prepped for the required aircraft type
- weapon is in a safe and serviceable condition
- the AGSE that the weapon was supplied with is serviceable
what are the charges and fuzes lifed IAW
JSMCR
what 3 forms are used in the maintenance of DC
- DC mini log
- S2033 defect report
- fuze history sheet
with regards to the acceptance and main case what do you inspect
damage
distortion
exudation and extrusion
what parts of the trolley to you check
start at the front and sequentially move down the trolley
wheels
handles
bumper bar
castor wheels
detachable beams
paulin
what are the before use inspection of the trolley
- VI of frame security, corrosion, cracks and welds
- exam straps:
i - security of attachment
ii - corrosion on the metal components
iii - the webbing for contamination, fraying, cuts security of stitching
- correct operation of breaks
- castor wheel brakes and locking latches operate correctly and that they are free from corrosion
- that the appropriate bumper - bar is fitted
what are the different variants of stingray torpedo?
warshot - operational body with live head - yellow band
EVT - operational body with exercise head - saxe blue band
TVT - non running head used for drill and launching - oxford blue band, fluorescent red head and tail
explain how the stingray finds and tracks targets
transducer arrey emit and pick up accoustic pressure waves,
as these waes hit a target they are reflected back and the transducers converts them into electrical signals, these signals contain information about position of target.
this info is sent to torpedo control circuits to produce rudder and elevator deflections to put the torpedo on a collision course with the target
the torpedo uses the munro effect to penetrate hull of submarine
what are the 5 main sections of a stingrey torpedo
nose - the sensor array
warhead - shaped charge
electronics section - solid state digital signal processing
power supply unit - seawater battery
motor control section - electro-magnetic actuators
list and describe the components of the electrons section in a stingray torpedo
safety and arming mechanism - helps safe carriage and stowage, detonates warhead with impact
control sensor unit - inertial measurmement system. uses solid state gyros, measures torpedo attitude, depth heading and acceleration for use of the autopilot
autopilot - controls torpedo in search/attack
signal processing unit - solid state digital system, interprets control information
what are the stingrey handling procautions
trolley bumper bar is fitted
do not handle control surfaces
sufficient personnel are available to handle
do not lean across or stand in front of suspension bands with safety pin removed
what is the procedure if the red sleeve is visible in the arming wire
this means that the first arming section has been activated and the torpedo is to be isolated and returned to the depot
what hazard does the seawater batter present to personnel
- a small amount of water entering the SWB port could start an exothermic reaction, leading to a fire
- SWB contains thallium which is toxic
- hydrogen is produced by the SWB when wet
- flames of the SWB burn with intense light
- battery cotents can deflegrate during fire
what action do you take with the stingray torpedo if smoke/fire is visible
- water is not to be applied until a fire is seen whith absolute certainty
- if a fire is confirmed fight with copious amunts of water
- water added by other means will be dangerous
- firefighter are to wear full kit
- correct PPE whe clearing away debris
- post fire. follow procedures laid down in instructions
what first aid should be done if you come into contact with stingray effluence
wash any conaminated area and seak immediate medical attention
list the stingray flight in air material (FIAM)
nose cap
suspension bands
cable harness pull out
parachute assembly
improved release uunit adaptor (IRUA)
