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AT 2023 notes > LO10 - Detailed study Mortars > Flashcards

LO10 - Detailed study Mortars Flashcards

1
Q

What are the 2 different explosive fills in CART 60mm MORT HE M768 W/FZ PD M783 used by ADF?

A
  • PAX 21 (CAN) NEQ 0.400
  • COMP B (US) NEQ 0.403
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2
Q

Tech data for CART 60mm MORT HE M768 W/FZ
PD M783

A
  • Complete round
     Length 376.9mm
     Diameter 59.8mm
     Mass 1.669kg
  • Fuze
     Length 87.6mm
     Vis length 66.1mm
     Mass 226g
  • Materials
     Body - Alloy steel HF 1
     Fin Assy - Aluminium
     Fuze - Cast Alloy
     Fuze Adaptor - Plastic
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant (qty 4)
  • Fuze
     Det Mod M100 Elec
     M61 Det
     Lead chge PBXN 5
     Booster chge PBXN 5
  • Max Range
     3500m (approx)
  • Marking & Colour
     Body colour OD
     Yellow Nomenclature
     Not to be fired from the M2 or M19 60mm mortar systems
  • Rates of fire
     Maximum 30 rnd/min (2m)
     Sustained 15 rnd/min
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3
Q

Fuze PD783 operation

A
  • On firing setback sensor in S&A recognises launch acceleration releasing the 1st rotor lock (zigzag)
  • As the mortar travels through its flight
     air is forced into the venturi in the ogive of the fuze turning the turbine and generating power
     At the same time the turbine drives the gear train in the S&A to remove 2 nd rotor lock (jackscrew)
     The gear train provides 100m min arming distance.
     Once the rotor is unlocked it rotates 180 and latches.
    Aligning the primary & secondary explosive elements
    Connects the elec Det
    Disengages the gear train from the alternator shaft
     Once S&A fully armed
    There is an elec delay to the elec arming until post round apogee (top of the trajectory in flight) by monitoring the turbine frequency.
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4
Q

Log Data for HE M768

A
  • PA189 Cylinder - Qty 1 - 1.85kg
  • BAM PA124 - Qty 8 - 20.41kg
  • Wire Bound Box - Qty 16 - 52.62kg
  • 4 Way W/Pallet - Qty 384 - 1308.16kg
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5
Q

Limitations of HE M768

A
  • No safe drop height
  • OP use only (AU)
  • VERTREP
     1270kg total weight
     1 unit load (1219mm x 1016mm x 1117mm)
     Airspeed 100kn
     Banking angle 45
  • Hot barrel cook off time is 75sec (@235 C)
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6
Q

CART 60mm MORT HE M888 W/FZ PD M935

A

Used against troops in the open, light veh etc.
0.4078kg Comp B

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7
Q

Tech data for CART 60mm MORT HE M888 W/FZ PD M935

A
  • Complete round
     Length 374mm
     Diameter 59.8mm
     Mass 1.680kg
  • Fuze
     Length 90.9mm
     Vis length 62.99mm
     Mass 258.5g
  • Materials
     Body - Alloy steel HF 1
     Fin Assy - Aluminium
     Fuze - Cast Alloy
     Fuze Adaptor - Plastic
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant (qty 4)
     Fuze PD M935
    M53 Primer Delay
    Detonators M76 Stab DLY M98 Stab
    Lead chge RDX Type A or B
    Booster chge RDX Type Via or Vlb
  • Max Range
     3500m (approx)
  • Marking & Colour
     Body colour OD
     Yellow Nomenclature
     Not to be fired from the M2 or M19 60mm mortar systems
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8
Q

Fuze PD M935 characteristics

A
  • Mechanical Fuze SQ and Delay
  • Aluminium head
  • Aluminium base & booster pellet
  • Fuze head contains the firing pin
  • Base houses the safety & arming device
  • Function on Impact SQ or 0.05sec delay
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9
Q

Fuze PD M935 Operation

A
  • Set by rotating the slotted shaft and removing the pull wire.
  • On firing setback pin moves rearward releasing a ball detent, releasing firing pin
  • Firing pin moves forward partially releasing detonator slider
  • Second setback pin moves releasing a 2nd ball releasing striker.
  • Striker moves rearward functioning delay element
  • Delay element maintains the explosive train out of line.
  • 2-6 second delay removes the arming pin from slider, arming alignment
  • Impact functions detonator, initiating lead and booster
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10
Q

CART 60mm MORT ILLUM (VL) M721 W/FZ MTSQ M776

A
  • Intended for use as battlefield illumination
  • The mortar is assembled with fuze MTSQ M776
  • Designed to function at an optimum Height of Burst (HOB) of 300 or 400m AGL for chge 1 - 4
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11
Q

Tab data for CART 60mm MORT ILLUM (VL) M721 W/FZ MTSQ M776

A
  • Complete round
     Length 376.9mm
     Diameter 59.8mm
     Mass 1.710kg
  • Fuze
     Length 87.6mm
     Vis length 49mm
     Mass 225g
  • Materials
     Body Alloy steel, plastic split ring
     Fin Assy Aluminium
     Fuze Cast Alloy
     Fuze Adaptor Plastic
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant (qty 4) or
     M204 Augmenting Chges
    M10 Flake propellant
     Illum Candle composition U/K
     Fuze
    Det DM1029
    FS 5
    Dextrinated Lead Azide
    PETN
    Booster Black Powder
  • Arming distance - 40m
  • Effective Range - 3.2 3.8km (approx)
  • Illumination
     Max 400,000 Candela 40sec
     Min 250,000 Candela 32sec
  • Marking & Colour
     Body colour white
     Black Nomenclature
     Not to be fired from the M2 or M19 60mm mortar systems
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12
Q

Fuze MTSQ M776 characteristics

A
  • Designed for a base ejection rnd
  • Has a mechanical arming device
  • Contains a black powder expulsion chge
  • Time settings from 6 - 54sec of flight
  • When set to “S” or “AZ” positions will function in impact only
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13
Q

Fuze MTSQ M776 operation

A
  • Time is set by rotating the head of the fuze in a counter clockwise direction to the required time setting
     If the setting is passed keep turning all the way around
  • Pin removed before firing
  • On firing the rnd is accelerated to 500g
  • Setback sleeve withdraws
     Allowing the setback pins to retract
     Unlocking the escapement
  • Setback pins lower collars disengage
  • Releasing the spring loaded Det housing to move under spring tension after the locking shaft has turned out of the slot in the Det housing
  • The escapement barrel continues to turn until it aligns with the tongue of the firing lever
  • Once this happens the striker spring forces the striker downwards
  • This then forces the firing lever and the lever release apart
  • The firing lever strikes the firing pin into the Det initiating the explosive train at the set time
  • The expulsion chge ignites and ejects the candle assy
  • The spring in the base of the body ejects the parachute from the tail cone
  • Parachute deploys to slow the rate of decent to provide battle field illumination
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14
Q

Log data M721 Illum

A
  • PA175 Cylinder - qty 1 - 1.905kg
  • BAM PA124 - qty 8 - 20.41kg
  • Wire Bound Box - qty 16 - 50.8kg
  • 4 Way W/Pallet - qty 384 - 1302kg
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15
Q

Limitations M721 Illum

A
  • No safe drop height
  • Only VERTREP in BAM PA191
  • VERTREP
     1270kg total weight
     1 unit load (1219mm x 1016mm x 1117mm)
     Airspeed 100kn
     Banking angle 45 degrees
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16
Q

CART 60mm MORT IR ILLUM M767 W/FZ MTSQ M776

A
  • Designed for battlefield illumination with NVD considerations
  • M767 provides IR illumination and enhanced night vision capabilities
  • Designed for use with standard night vision devices
  • Proj is loaded with an illum candle assembly and parachute assembly
17
Q

Tab data for CART 60mm MORT IR ILLUM M767 W/FZ MTSQ M776

A
  • Complete round
     Length 326mm
     Diameter 59.8mm
     Mass 1.710kg
  • Fuze
     Length 87.6mm
     Vis length 49mm
     Mass 225g
  • Materials
     Body Alloy steel, plastic split ring
     Fin Assy Aluminium
     Fuze Cast Alloy
     Fuze Adaptor Plastic
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant (qty 4) or
     M204 Augmenting Chges
    M10 Flake propellant
     Illum Candle composition
    FW1418 (Black Nite) comp
    First Fire Comp
    Illum Comp
    Ignition Comp
  • Fuze
     As per M721 Illum
  • Effective Range
     As per M721 Illum
  • Illumination
     500 (at the near IR wavelength of the electromagnetic part of the spectrum (between 60 to 90µm))
  • Burn time
     40sec approx
  • Marking & Colour
     Body colour white w/orange band
     Black Nomenclature
     Not to be fired from the M2 or M19 60mm mortar systems
18
Q

Limitations M767 IR ILLUM

A
  • No safe drop height
  • Only VERTREP in BAM PA191
  • VERTREP
     1270kg total weight
     1 unit load (1219mm x 1016mm x 1117mm)
     Airspeed 100kn
     Banking angle 45
19
Q

Log data for M767 IR ILLUM

A
  • PA123 Cylinder - qty 1 - 1.905kg
  • BAM PA124 - qty 8 - 20.41kg
  • Wire Bound Box - qty 16 - 50.8kg
  • 4 Way W/Pallet - qty 384 - 1302kg
20
Q

CART 60mm MORT SMK WP M722A1 W/FZ PD M783

A

Designed to provide battlefield screening and target marking

21
Q

Tab data for 60mm MORT SMK WP M722A1 W/FZ PD 783

A
  • Complete round
     Length 376.9mm approx
     Diameter 59.8mm
     Mass 1.669kg approx
  • Fuze
     Length 87.6mm
     Vis length 66.1mm
     Mass 226g
  • Materials
     Body Alloy steel, plastic split ring
     Fin Assy Aluminium
     Fuze Cast Alloy
     Fuze Adaptor Plastic
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant ( qty 4) or
     M204 Augmenting Chges
    M10 Flake propellant
     Fuze
    As per M768 HE
     M85 burster
  • Max Range
     3500m (approx)
  • Marking & Colour
     Body colour light green
     Red Nomenclature
     Yellow hazard band
     Not to be fired from the M2 or M19 60mm mortar systems
22
Q

60mm MOR WP Operation

A
  • Fuze functions initiating the M85 burster
  • Case ruptures and expellees WP
  • WP mixes with atmospheric oxygen and starts producing white smoke
23
Q

Log Data M722A1 SMK WP

A

PA189 Cylinder - qty 1 - 1.85kg
BAM PA124 - qty 8 - 20.41kg
Wire Bound Box - qty 16 - 52.62kg
4 Way W/Pallet - qty 384 - 1308.16kg

24
Q

Limitations M722A1 SMK WP

A
  • No safe drop height
  • OP use only (AU)
  • VERTREP
     1270kg total weight
     1 unit load (1219mm x 1016mm x 1117mm)
     Airspeed 100kn
     Banking angle 45
25
Q

CART 60mm PRAC M769 W/FUZE PD M775

A
  • Designed to replicate the utilisation and ballistics of the M720/M720A1 HE with the Fuze Multi Option M734A1
  • M769 is designed as a low cost, full range, practice alternative to HE rounds
  • Consists of a hollow shell body with no energetic fill
  • Utilises a centre vent tube to allow the visual and auditory fuze signature (flash/smoke accompanied by a bang)
  • Vented through the four exhaust vent holes in the aft body
26
Q

Tech data for Cart 60mm Prac

A
  • Complete round
     Length 377.9mm approx
     Diameter 59.8mm
     Mass 1.701kg approx
  • Fuze
     Length 104.4mm
  • Materials
     Body Alloy steel, plastic split ring
     Fin Assy Aluminium
     Fuze Cast Alloy
  • Energetic material
     M702 Ignition Cart
    Fed Primer 150
    Pellet (Black Powder) M9 Propellant
     M235 Augmenting Chges
    M38 Ball Propellant (qty 4) or
     M204 Augmenting Chges
    M10 Flake propellant
     Fuze M775
    SW592 Pyrotechnic Mixture
    Primer
  • Max Range
     3600m (approx)
  • Marking & Colour
     Body colour blue
    White Nomenclature
     Brown hazard band
     Not to be fired from the M2 or M19 60mm mortar systems
27
Q

60mm MOR M769 Operation

A
  • Fuze functions on impact
  • Pyro chge is initiated
  • Flash smoke are emitted from the exhaust holes located in the aft body of the Proj
  • An auditable bang is heard (if close enough)
28
Q

Log Data M769 Prac

A
  • PA189 Cylinder - qty 1 - 2.2kg
  • Wire Bound Box - qty 16 - 42.56kg
  • 4 Way W/Pallet - qty 384 - 1063kg

AT 2023 notes (9 decks)

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