PzGr40
28.04.2010, 23:39
Cutaway model of a Russian OZM-72 bounding anti personel mine. The mine is build up of a steel launching bushing (mortar) with a loose base cup placed in the base that forms the reinforced launching pad for the mine. The mine itself is placed on the upper ridge of the base cup and the cable of the pull igniter of the mine is connected to the base cup with the other side. In the factory, the mine and base cup are placed in the mortar bushing after which a crimpring is applied approximately 1 cm over the base of the launching pipe to fixate the base cup in the mortar pipe. The mine itself is build up of a upper and lower flange, held toghether by the central -firing pin and booster housing- pipe. This pipe houses the firing pin (release) mechanism in the lower part and the detonator and booster charge (white) in the upper part.
The fragmentation sleeve exists of steel slugs -ø5 x 5 mm long- cast in white plastic. An aluminium pipe between the upper and lower flange with a bag of powder in it forms the expulsion charge. In top of the pipe an adepter piece is placed which has a ball on the inside. This ball enshures the flame of the MUV-2 fuze can travel down, however the gasses of the expulsion charge cannot travel upward , preventing loss of pressure ( a kind of non return valve). The complete mine is fixated in the launching bushing by a roundgoing crimp at the upper edge of the launching bushing under which a rubber O-ring is placed to enshure the mine is moisture proof.
Functioning of the mine:
The mine is placed in a cilindrical hole in the ground. A trip wire is deployed and connected to the MUV-2 fuze. The fuze is activated by removing the arming delay pin (upper pin with ring) after which a steel wire on the back of the firing pin starts cutting through a lead strip. This delays the arming of the mine to avoid accidents. When the lead strip is cut, the firing pin has moved down appr. 8mm, leaving the fuze fully armed. If someone pulls the tripwire, the butterfly pin is pulled from the fuze and the firing pin hits the firing cap. This flame ignites the bag of powder in the aluminium pipe, building up pressure in the base cup, hurling the mine up in the air.
When the mine is thrown upward it will reach the end of the cable and it will pull back the firing pin, tensioning the firing pin spring. The firing pin exists of two parts; the upper half with the point and the spring and the lower half that is connected to the cable. The two parts are connected with an interlocking construction (detail A) which only allows the pin to fall apart if the firing pin is pulled out of the hole that keeps the parts together. When the pin falls apart , the upper part is launched upward by the tensioned spring into the firing cap. This flame ignites the detonator, igniting the booster (white), which ignites the main charge of TNT at approxamately one meter above the ground. The purple “lipring” (detail B) enshures the firing pin combination cannot creep down during storage and handling to avoid accidents.
The mine has been used in Afghanistan, Angola, Cambodja, Cuba, Eritrea, Ethiopia, Mozambique, Namibia, Nicaragua, Sudan, Vietnam, Yemen and Zambia.
Height : 172 mm
Diameter : 106 mm
Explosive charge : 500 gram TNT
Length of mine with fuze : 238 mm
Regards, DJH
The fragmentation sleeve exists of steel slugs -ø5 x 5 mm long- cast in white plastic. An aluminium pipe between the upper and lower flange with a bag of powder in it forms the expulsion charge. In top of the pipe an adepter piece is placed which has a ball on the inside. This ball enshures the flame of the MUV-2 fuze can travel down, however the gasses of the expulsion charge cannot travel upward , preventing loss of pressure ( a kind of non return valve). The complete mine is fixated in the launching bushing by a roundgoing crimp at the upper edge of the launching bushing under which a rubber O-ring is placed to enshure the mine is moisture proof.
Functioning of the mine:
The mine is placed in a cilindrical hole in the ground. A trip wire is deployed and connected to the MUV-2 fuze. The fuze is activated by removing the arming delay pin (upper pin with ring) after which a steel wire on the back of the firing pin starts cutting through a lead strip. This delays the arming of the mine to avoid accidents. When the lead strip is cut, the firing pin has moved down appr. 8mm, leaving the fuze fully armed. If someone pulls the tripwire, the butterfly pin is pulled from the fuze and the firing pin hits the firing cap. This flame ignites the bag of powder in the aluminium pipe, building up pressure in the base cup, hurling the mine up in the air.
When the mine is thrown upward it will reach the end of the cable and it will pull back the firing pin, tensioning the firing pin spring. The firing pin exists of two parts; the upper half with the point and the spring and the lower half that is connected to the cable. The two parts are connected with an interlocking construction (detail A) which only allows the pin to fall apart if the firing pin is pulled out of the hole that keeps the parts together. When the pin falls apart , the upper part is launched upward by the tensioned spring into the firing cap. This flame ignites the detonator, igniting the booster (white), which ignites the main charge of TNT at approxamately one meter above the ground. The purple “lipring” (detail B) enshures the firing pin combination cannot creep down during storage and handling to avoid accidents.
The mine has been used in Afghanistan, Angola, Cambodja, Cuba, Eritrea, Ethiopia, Mozambique, Namibia, Nicaragua, Sudan, Vietnam, Yemen and Zambia.
Height : 172 mm
Diameter : 106 mm
Explosive charge : 500 gram TNT
Length of mine with fuze : 238 mm
Regards, DJH