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ATO 2024 > 120mm Ammo > Flashcards

120mm Ammo Flashcards

1
Q

CART 120mm M830A1 HEAT MP T and Fuze PIBD M774 Projectile Assembly

A

Three piece aluminium sabot

Shaped charge warhead containing
composition A3 type 2 with a HMX booster

FISA houses M74 Proximity and nose
impact switches

Fuze M774 PIBD

Detonator M69

Booster/Lead PBXN 5 (1.1grams)

Tracer element ––(10.4 grams)

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2
Q

CART 120mm M830A1 HEAT MP T Cartridge characteristics

A

Case Base and Seal Assembly (CBSA)

Case base steel

Seal silicon rubber

Combustible Cart Case (CCC)

Painted and sealed NC mixed with wood pulp,
polyurethane and N Methyl N, N diphenylurea

Main Charge propellant (JA 2)

Electric Primer (M129)

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3
Q

CART 120mm M830A1 HEAT MP T markings

A

Cart case is Silver

Projectile is Black with Yellow Markings

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4
Q

What type of propellants are JA-2 vs M14

A

Double and single base respectively

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5
Q

M830 HEAT MPT Dimensions

A

Round Length: 984mm (max)

Cartridge Diameter: 169mm (max)

Projectile Length: 778mm (max)

Projectile Diameter w/sabot: 119.8mm

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6
Q

M830 HEAT MP-T Weights

A

Round Mass: 22.7kg

Projectile Mass: 11.4kg

Propellant: 7.5kg

Remaining Mass: 3.6kg (sabot, case
base/primer and CCC)

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7
Q

M830 HEAT MP-T Fill

A

Main fill is COMP A3 type II with a HMX
booster (939g)

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8
Q

Operation of M830 HEAT MP-T

A

Fuze set prior to loading

Voltage applied to electric primer (M129)

Ignites propellant (JA 2), tracer element and CCC

Gases generated propel projectile down barrel

Silicon seal at rear of the sabot provides obturation

Aerodynamic forces cause sabot and obturator to separate

Setback allows the release mechanism in the M774 to release rotor from first safe position

Voltage generators activated on setback, charging the M774 firing capacitor and M74 proximity fuze capacitor

Deceleration on exiting the barrel allows rotor to move into the armed position aligning the explosive train

Target sensed by M74, firing signal is sent to M774 fuze

M774 firing capacitor provides energy to initiate M69 detonator

M69 detonator initiates fuze lead cup, initiates
booster cup, initiates warhead

Copper jet formed along with shrapnel and blast.

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9
Q

Prior to loading, what can the Fuze PIBD
M774 be set to ?

A

Ground (G) point detonating

Air (A) proximity mode

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10
Q

KE-W sabot construction

A

3 piece Sabot made from thermo plastic

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11
Q

120mm APFSDS T KE W A2 Primer?

A

M129 Primer

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12
Q

120mm APFSDS T KE W A2 weights

A

Round Mass: 20.5kg

Projectile Mass: 7.8kg

Propellant: 8.7kg

Remaining Mass: 4kg (sabot, case
base/primer and CCC)

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13
Q

120mm APFSDS T KE W A2 dimensions

A

Round Length: 985mm

Cartridge Diameter: 169mm

Projectile Length: 795mm

Projectile Diameter w/sabot: 119.8mm

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14
Q

KE-W Operation

A

Fired electrically thru the M256 Firing System

Voltage applied to the M129 Primer

Initiates primers ignition charge to a small gunpowder charge which in turn initiates the primer’s Benite Strands.

These benite strands are evenly distributed within the primer tube and is designed to give maximum initiation of the main propellant charge JA 2

JA 2 burns which consumes the CCC and ignites the tracer element

Expanding gases accelerates the projectile into and thru the barrel

The steel case base and seal assembly (CBSA) and theprimer tube are left behind

Obturation is provided by the Nylon obturator and seal on the projectile

Projectile exits Barrel allowing the Sabot/Obturator to peel off and discard

Leaving the penetrator to travel to the target

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15
Q

Number of balls in CART 120mm M1028 CANISTER and their individual weight?

A

1100 8.3g tungsten steel balls

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16
Q

CART 120mm M1028 CANISTER weights

A

Round Mass: 22.9kg

Projectile Mass: 11kg

Propellant: 7.2kg

Remaining Mass: 5.3kg (case base/primer
and CCC)

17
Q

M1028 dimensions

A

Round Length: 779mm
Cartridge Diameter: 169mm
Projectile Length: 222.3mm
Projectile Diameter: 119.7mm (max)

18
Q

M1028 Primer?

A

Modified M125 Primer (Rubber
Coated)

19
Q

M1028 construction?

A

Aluminium Cap – Frangible , no interference
with payload dispersion from canister.
Fwd Body – Contains 4 “V” notched axial
slots to facilitate body sidewall separation on
muzzle exit
Aft Body – Houses obturatiing band and
payload.
Payload – Packed from top with foam
material reinforced with 4 PVC posts ensures
compactness of payload.

20
Q

Describe the role of the 120mm Canister
round?

A

Offensive fire against exposed enemy
Defensive fire against massed infantry
assaults

21
Q

120mm TPCSDS-T M865 range

A

8000m

22
Q

120mm TPCSDS-T M865 primer

A

M125 Primer

23
Q

Cart 120mm TPCSDS T M865 weights

A

Round Mass 17kg

Projectile Mass 2.75kg

Main Propellant Mass 7.7kg

Remaining Mass 6.41kg ( sabot, case base/primer and CCC)

24
Q

Cart 120mm TPCSDS T M865 dimensions

A

Round Length: 881mm

Cartridge Diameter: 169mm

Projectile Length: 470mm

Projectile Diameter: 38mm

25
Q

CART 120mm M831A1 TP-T weights

A

Round Mass: 22.9kg
Projectile Mass: 12.0kg
Propellant: 6.9kg
Remaining Mass: 4.0kg ( case base/primer
and CCC)

26
Q

CART 120mm M831A1 TP-T primer

A

M125

27
Q

CART 120mm M831A1 TP-T dimensions

A

Round Length: 981mm (max)

Cartridge Diameter: 169mm (max)

Projectile Length: 522mm (max)

Projectile Diameter: 119.8mm (max)

28
Q

The Cart 120mm M831A1 TP T is used to
Simulate which round ?

A

Obsolete M830 HEAT MP T

29
Q

Cart 120mm M1002 Target Practice
Multi Purpose Tracer (TPMP T) primer

A

M125

30
Q

Cart 120mm M1002 Target Practice
Multi Purpose Tracer (TPMP T) dimensions

A

Round Length: 984mm
Cartridge Diameter: 169mm (max - base)
Projectile Length: 532mm
Projectile Diameter (sabot): 119.8mm
(max)

31
Q

Cart 120mm M1002 Target Practice Multi Purpose Tracer (TPMP T) weights

A

Round mass 20.9kg
Projectile mass with sabot 8.2kg
Main propellant 7.6kg

ATO 2024 (31 decks)

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