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AV Laet QC > underwater weapons and pyrotechnics > Flashcards

underwater weapons and pyrotechnics Flashcards

1
Q

what are the depth charge handling procedures

A
  • depth charge have thin skin
  • before handling check for extrusion and exudation
  • fittted depth charges must be kept apart from unfitted
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2
Q

what are the three main units a depth charge is made up of?

A

Case - contians main explosive

Fuze - initiates the main charge

Tail - arming device

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3
Q

what does fitted and unfitted mean

A

FITTED

fitted means the activity of assempling armament stores and components to constitute a complete weapon

UNFITTED

process of disassembling a complete weapon

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4
Q

what are the operational requirments of a air launched depth charge

A
  1. able to stand up to handling
  2. can be attached to aircraft and safe carriage
  3. capable of live or safe release
  4. explode at a predetermined depth
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5
Q

what what makes up the fuze

A

a valve unit, a pistol unit, a detonator placer assembly and a primer

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6
Q

how are the different variants of the depth charge ID

A
  • 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
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7
Q

explain the operation of a DC in live release

A
  • 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
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8
Q

explain the operation of the depth charge in safe release

A
  • 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
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9
Q

what are the acceptance checks of the DC mk 11 MOD 3

A
  1. weapon has been correctly prepped for the required aircraft type
  2. weapon is in a safe and serviceable condition
  3. the AGSE that the weapon was supplied with is serviceable
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10
Q

what are the charges and fuzes lifed IAW

A

JSMCR

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11
Q

what 3 forms are used in the maintenance of DC

A
  1. DC mini log
  2. S2033 defect report
  3. fuze history sheet
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12
Q

with regards to the acceptance and main case what do you inspect

A

damage

distortion

exudation and extrusion

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13
Q

what parts of the trolley to you check

A

start at the front and sequentially move down the trolley

wheels

handles

bumper bar

castor wheels

detachable beams

paulin

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14
Q

what are the before use inspection of the trolley

A
  1. VI of frame security, corrosion, cracks and welds
  2. exam straps:

i - security of attachment

ii - corrosion on the metal components

iii - the webbing for contamination, fraying, cuts security of stitching

  1. correct operation of breaks
  2. castor wheel brakes and locking latches operate correctly and that they are free from corrosion
  3. that the appropriate bumper - bar is fitted
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15
Q

what are the different variants of stingray torpedo?

A

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

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16
Q

explain how the stingray finds and tracks targets

A

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

17
Q

what are the 5 main sections of a stingrey torpedo

A

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

18
Q

list and describe the components of the electrons section in a stingray torpedo

A

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

19
Q

what are the stingrey handling procautions

A

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

20
Q

what is the procedure if the red sleeve is visible in the arming wire

A

this means that the first arming section has been activated and the torpedo is to be isolated and returned to the depot

21
Q

what hazard does the seawater batter present to personnel

A
  • 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
22
Q

what action do you take with the stingray torpedo if smoke/fire is visible

A
  • 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
23
Q

what first aid should be done if you come into contact with stingray effluence

A

wash any conaminated area and seak immediate medical attention

24
Q

list the stingray flight in air material (FIAM)

A

nose cap

suspension bands

cable harness pull out

parachute assembly

improved release uunit adaptor (IRUA)

25
Q

what are the stingray acceptance checks

A

VI for damage

inspection of nose area and cap

inspect safety arming mechanism

torpedo is positioned correctly in trolley

inspect H bands

battery cover is intact and forms a good seal

arming wire is fitted and correct length

anti-vibration ring is fitted

parachute is inspected

26
Q

what is the torpedo weapon response simulator (TWRS)?

A

this gives aircrew a simulated responce for the stingray

it gives 9 separate practice releases from one aircraft station

after flight memory can repeat all switch slections made to check procedures

27
Q
A

AV Laet QC (13 decks)

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