Grenade launcher DP-64 «Nepryadva» designed to protect surface ships from attack by divers in the open anchorage, exterior raids Fri-based, to protect it from attack frogmen offshore platforms, waterworks and other principal coastal and marine facilities. The grenade launcher was developed in the 1980s and in 1990 accepted for service. DP-64 is a double-barreled 45-mm grenade launcher with vertical shafts, it can be used with high-explosive grenade PG-45 and the signal — the SG-45. Grenade launcher for the first time was shown to possible buyers at the fair in 1993.
Shooting from the DP-64 «Nepryadva» done with each of the trunks at a time. To recharge his grenade launcher breech swings down, and in trunks laid grenades previously exposed deep tripping fuse from 0 to 40 meters. In the case of underwater blasting explosive ordnance FG-45 acoustic wave affected all living within 14 meters before a shot fuse located in the bow of the FG-45, exhibiting a suitable depth response, then the undermining of the fragmentation occurs at a given depth.
At the same time, SH-munition 45 intended to illuminate and indicate the place in which the enemy swimmers were detected. In the SH-45 used a mechanical fuse pin type. When you hit the water on light grenades triggered lifting charge, which pushes out the SH-45 pyrotechnic torch. Torch floats on the surface and glows quite catchy reddish color, illuminating all around. Action grenades signal every 50 seconds.
Resettled mechanical grenade fuse when the fuse is locked trigger. Flag Guard is specifically trigger guard. DP-64 grenade launcher resettled sectional sight increments division 50m Mounted on a grenade sight allows the shooter to keep the fire from concealed positions as on the cable line movement and direct fire. Weight grenade «Nepryadva» does not exceed 10 kg.
DP-64 grenade launcher «Nepryadva» works on the principle of the dynamo-rocket launchers. The main part of the grenade launcher comprises two x-smooth walled barrel having a length of 600 mm and fixed in the breech, where they are held together at the center by means of a clamp coupling and the sighting muzzle. Trunks grenade closed by the shutter with a large rubber butt pad on the shoulder rest. In the bottom part of the trunk is placed front handle, which serves to hold the grenade when fired, as the rear handle with the trigger. In the upper part of the gate are the cocking lever and locking. Sight-quadrant located in the upper part of the sighting clutch on the left side.
DP-64 grenade launcher never in mass production did not run, but at times it ran in small batches to ship weapons marine units, ship-crews katernogo composition, certain parts FSO ship-katernogo of maritime security Border Guard Service and PDSS troops (forces and anti-sabotage funds). Also, this instrument was offered for export, but information about its sales outside absent.
Story of creation and testing
History of creation of this grenade goes back to 1981, when TsKIB SOO act accordingly reference for the research work. The project «Nepryadva» had to create two grenade: a double-barreled 45-mm grenade launcher and an active 50-mm active-reactive, which later had to be only one. By the spring of 1983 were created layout standards both grenade caliber: 45 mm firing range of up to 400 meters and 50-mm firing range of up to 1,500 meters. By June 1983 they jointly ballistic units were sent for testing in Sevastopol.
In the course of these tests it was decided to halt work on 50-mm grenade. Also, from the construction of prototypes sailors asked to exclude the carrying handle, which also makes the role of sight when shooting straight shot. Other suggestions and comments were not sailors. Then there was a pause length of 2 years. TsKIB SOO received job development work on the project «Nepryadva» first in 1985.
By the time the development was approved by the double-barreled 45-mm grenade launcher closed. Was created operational and design documentation for standards and experienced series of adaptations. For example, on the rubberized mount that served to secure the grenade easily removable bulkheads at battle stations, and other places in which watchman or other member of the team, finding purpose in the water, could simultaneously detach grenade and use it as intended.
Vertical placement barrel grenade launcher allowed to make «Nepryavdu» fairly flat and very comfortable to wear behind, for example, when the forced march that soldiers and sailors had to make in the process of patrolling waters and the coast on foot. The introduction of the AKM belt for fastening it to swivel at the muzzle and on the body of a rubber recoil pad on the axis passing through the center of mass is shown to be a pretty good solution, although it required a number of modifications.
Later, one of the grenade was sent to Leningrad to the landfill (Rzhevka), where tests were conducted and the conclusion is made in energy recoil and sound level. Sound when fired grenade did not seek protection ears arrow, and the recoil energy of 45 J, which was below the allowable values for technical specifications — 59 J. Despite the fact that the actual recoil energy was higher than permitted by energometricheskim standards (35 J), firing grenade quite simply postponed due to implement the scheme and the presence of shot shoulder rest with a perforated rubber butt pad. Night tests with access to the sea showed that DP-64 «Nepryadva» rather weak, and nedemaskiruyuschee Antidazzle muzzle flash.
Pretty exciting came first combat firing a grenade launcher, which indirectly justify the higher efficiency of its striking underwater action. First series of shots, the first of them with the same side of the ship actually vertically in the water accompanied by a roar such force as if the diving board the ship crashed laden KamAZ. After the shot immediately ran on deck midshipman, who started yelling, «What are you doing! You will tear me all pipes! «. Then testers defected to the stern of the ship and shot him «under the tail.» Again accompanied by an underwater explosion and the emergence of a terrible crash on the deck of another midshipman, who shouted: «What are you doing! I will knock you glands! «. Taking all this into account, the profession of combat swimmer in these moments something did not look pretty.
State tests grenade were launched in October 1988 in Sevastopol. Tests accompanied by enough bad weather and were really fighting. After several days of waiting in vain sea diving ship had to leave for scheduled maintenance, and the testers had to go to sea on a small flat bottom vessel towing. October 12, when the complex began tests in the sea, the sea state, in the views of the most experienced sailors, was already 5 points, while «Nepryavda» could be used at sea to 4 points. But had nowhere to retreat, and the state commission gave the nod to start the test.
At this time the fire from a grenade launcher were not different members of the commission, and five selected sailors — all with secondary technical education. During the briefing they grasped almost on the fly and only first putting on a neck strap with weighty grenade launcher (though 10 kg), politely but quite impressively grunted. With all this sailors shoot grenades in sufficient criteria heavy seas sweep decks, noted that not tired.
Strategy combat use DP-64 grenade launcher meant in case of attack from the sea loading 1st signal from the trunks of the SG-45 grenade that was used to mark the location on the target aqua surface on which, as we know, there is no guidance. Signal Fires grenade after Cueing on the range and course objectives. Pineapple floated on the surface of reddish glowing torch, which was carried out by firing high-explosive ammunition FG-45, sometimes on purpose again produced signal grenades. Torches of SG-45 perfectly burned even in the criteria of the storm. According to the results of these tests grenade «Nepryadva» order dated March 4, 1990 was adopted by the Navy.