microplastic
Well-Known Member
Cutaway model of the Bulgarian 40mm OG-7V High Explosive Fragmentation round, used with the rpg-7 grenade launcher. The PG-7V round consists of the OG-7 projectile and the screwed PG-7P booster unit. The projectile is usually equipped with the O-4M fuze.
The booster unit is housed in a cardboard tube and consists of the fin stabilizing unit with tracer and turbine at the rear, the proppellent charge stripes and the ignition charge bags in the middle. At the end is a foam wad pad.
Upon launch, the flame from the percussion primer flashes the igniter bags in the fin-assembly, which ingits the propellant strips via the flash holes. The gas pressure pushes the round out of the tube, imparting initial spin and igniting the tracer element. The wings fold out and give the projectile a slow rotation.
When fired, setback forces the sleeve downwards and releases the upper safety ball. When setback is over, the sleeve spring pushes the striker sleeve and the fire pin in upper position and releases the primer carrier. The spring-loaded carrier is pushed sidewards in ignition position. The fuze is armed; arming distance: 6m – 25 m. If the round (with cap) hits a target, the insert runs onto the fire pin which hits the primer. If hit without a cap (Splinter effect), the membrane is destroyed and the fire pin is pushed into the primer. The primer initiates the booster and then the detonator. The detonator initiates the main charge.
Maximum effective fire range: 1 000m
Direct fire range: 170 m
Weight of round: 1.750 kg
Length of round: 595 mm
Weight of main charge TNT: 0.350 Kg
Number/radius of frags: Above 850 frags up to 70m
muzzle velocity: 152 m/s
Fuze arming distance: 6 to 25 m
The booster unit is housed in a cardboard tube and consists of the fin stabilizing unit with tracer and turbine at the rear, the proppellent charge stripes and the ignition charge bags in the middle. At the end is a foam wad pad.
Upon launch, the flame from the percussion primer flashes the igniter bags in the fin-assembly, which ingits the propellant strips via the flash holes. The gas pressure pushes the round out of the tube, imparting initial spin and igniting the tracer element. The wings fold out and give the projectile a slow rotation.
When fired, setback forces the sleeve downwards and releases the upper safety ball. When setback is over, the sleeve spring pushes the striker sleeve and the fire pin in upper position and releases the primer carrier. The spring-loaded carrier is pushed sidewards in ignition position. The fuze is armed; arming distance: 6m – 25 m. If the round (with cap) hits a target, the insert runs onto the fire pin which hits the primer. If hit without a cap (Splinter effect), the membrane is destroyed and the fire pin is pushed into the primer. The primer initiates the booster and then the detonator. The detonator initiates the main charge.
Maximum effective fire range: 1 000m
Direct fire range: 170 m
Weight of round: 1.750 kg
Length of round: 595 mm
Weight of main charge TNT: 0.350 Kg
Number/radius of frags: Above 850 frags up to 70m
muzzle velocity: 152 m/s
Fuze arming distance: 6 to 25 m
