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Use:
The ground burst antipersonnel mine M74 can be emplaced only by the ground vehicle mine dispenser M128.
This mine may be used in mixed minefields to protect antitank mines against enemy breaching parties.



Description:
The mine is green, cylindrical in shape, and fabricated of thick-wall steel tubing which is internally scored for maintaining uniform fragment size. It has an internal Safing and Arming (S&A) device, an electronic assembly, a power supply, and four tripline assemblies at each end (eight total). The mine is set for a specific (normal) self-destruct time by the manufacturer; however, during operations it can be set for a long selfdestruct time, depending on the mission requirement.
The mines are shipped and stored in a sealed desiccated container. The container holds eight sleeves, each containing five mines for a total of 40 mines per container. The containers are palletized, with six containers per pallet.
Functioning:
Partial arming results from the angular velocity obtained as the mine travels through the launcher of the dispenser. A magnetic impulse provided by two transmitter coils located in the launcher muzzle initiates a low-order detonating primer, which activates two electrical power for mine functioning. After the mine comes to rest on the ground, a signal from the electronic assembly initiates a pressure cartridge, which causes ejection of the four tripline assemblies. The triplines uncoil from their bobbins until the tripline assemblies impact the ground. The mine is completely armed in 40 to 60 seconds after launch and is ready to detect a target.
The mine will function in response to any of the following conditions: (1) movement of a tripline, (2) physical disturbance of the mine, (3) expiration of the self-destruct time, or (4) power rundown.

Tabulated Data:
Mine, Antipersonnel: HE, M74:
Painting .............................Green
Marking .............................Black
Height (max) .....................2.60 in. (6.60 cm)
Diameter (max) .................4.75 in. (12.07 cm)
Weight...............................3.10 lb (1.41 kg)
Material .............................Steel tubing
Operational Temperature Limits:
Minimum ...........................-40F (-40°C)
Maximum ..........................+150F (+660C)
Explosive Weight per Mine:
Composition B4.................0.90 lb (0.41 kg)
Composition A5.................0.22 oz (6.35 g)
PBXN-5 .............................0.17 oz (4.70 g)
Self-destruct Times after Launch: Normal ..............................5 days
Long ................................15 days

Source: TM 43-0001-36 Ammunition Data Sheets for Landmines