URL : https://www.valka.cz/SOV-AK-176-76-2-mm-universalni-kanon-t115697#401425
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AK-176 - universal on-board single-barrel automatic cannon caliber 76.2 mm.
The development of a universal automatic cannon caliber 76.2 mm in the Soviet Union began in the late 60s of the 20th century on the basis of requirements for a light and universal platform designed for small vessels and cutters, designed primarily to combat air and surface targets after rocket launches and also in areas where missiles cannot operate. The requirements for the new universal cannon were completed on September 30, 1969, and by the end of September 1971, the design office Burevestnik ( & # 1062; & # 1053; & # 1048; & # 1048; "& # 1041; & # 1091; & # 1088; & # 1077; & # 1074; & # 1077; & # 1089; & # 1090; & # 1085; & # 1080; & # 1082; ") project A-221 . Design work and production of the prototype lasted until 1977, when the prototype was from 14.04. to 14.07.1977 subjected to shooting tests at the Rževka shooting range ( & # 1056; & # 1078; & # 1077; & # 1074; & # 1082; & # 1072;) at Leningradu. These tests were followed by the installation of the system (in addition to the weapon itself, there was also a fire control system MR-123) on the vessel R-5 (project 1241.1) and other tests that took place from 23.01. to 30.01.1979 in the premises of the Baltijsk military base ( & # 1041; & # 1072; & # 1083; & # 1090; & # 1080; & # 1081; & # 1089; & # 1082;[/i ]). After successful testing, the system was under the factory designation AK-176-MR-12/176 ( & # 1040; & # 1050; -176 - & # 1052; & # 1056; -123/176) (cannon A-221 + fire control system) by the decision of the Minister of Defense of the USSR No. 101 of 22.07.1979 introduced into service as the AK-176.
The original AK-176 was gradually installed on all types of newly built small vessels not only in the USSR but also in friendly countries. Over time, the individual elements were modernized, the modernized shooting system is marked AK-176M (it also contains a modernized SRP MR-123-02 equipped with a radar and a television sight and laser rangefinder, with a range of 30 (with interference) -45 km (without interference) ). AK-176M also uses another tower with STEALTH elements and since 2010 it is offered to foreign interested parties. Among other things, its weight is reduced by almost 7 tons.
AK-176 can also work effectively against anti-ship missiles Harpoon and missiles with flat flight path Tomahawk (for tests he also successfully destroyed anti-tank guided missiles Falanga, which imitated Harpoon missiles, while to destroy one missile was used cannon can be guided to the target in 3 ways - automatically via ESP-221 ( & # 1069; & # 1057; & # 1055; -221) based on SRP data MR-123/175, semi-automatic - cannon operation based on SRP MR-123/175 data from ESP-221 indicators and manually, using the optical sight VD-221 ( & # 1042; & # 1044; -221) placed on the weapon.
The AK-176 is a single-barreled automatic cannon located in a covered turret. The construction of the tower is designed to reduce the weight of the weapon, while for the first time in the USSR a new, aluminum-magnesium alloy Amr61 with a thickness of 4 mm (a standard steel tower with a wall thickness of 5 mm was also designed, which would increase the weight by up to one ton) The control of the cannon is remote, in case of emergency, manual control directly from the tower is also possible. The barrel is grooved and consists of a monoblock housed in a case. The operation of the machine uses the energy of the slide, the end is wedge-mounted, placed vertically. The cooling of the barrel is permanent water with forced circulation (water flow speed 3.5 m/s, between the barrel itself and the case). Cooling allows you to fire a continuous dose of 70 (75) rounds every 30 minutes. The cartridge feeder feeds cartridges from both sides. Both mechanisms are identical, the power supply is provided by an external power supply.The feeding machine ensures the supply of ammunition from two magazines of 76 rounds under the weapon. The cannon uses ammunition identical to the ammunition used in the 76.2 mm AK-726 double cannon.
Other TTD: Firing height: 1570 mm Radius of rotation of the cannon with the barrel in the horizontal plane: 4400 mm Turning radius of the tower with the barrel in the maximum area: 1750 mm Mounting ring diameter: 3165 mm Number of fixing screws: 36 Aim: -15 ° - + 85 ° in manual mode/-10 ° - + 80 ° when using ESP-221 Measurement: +/- 175 ° from the axis of the vessel in manual mode/+/- 168.5 ° when using ESP-221 Survey speed: 1.3 °/s in manual mode, 13 °/s in manual tower guidance, 30 °/s when using ESP-221 Measuring speed: 3 °/s in manual mode, 14 °/s in manual tower guidance/35 °/s when using ESP-221 Cannon tower weight: 2796 kg Weight of automatic feeder with magazines: 1750 kg Weight of power supply systems (outside the tower): 1274 kg
Barrel length: 4496 mm (L/59) Number of grooves: 24 Slot pitch: 5 ° 51´42 " Slip: 380-500 mm Muzzle velocity: 980 m/s Range (effective): 11600 m (air targets)/15700 m (surface and ground targets) Range (ballistic): 16000 m Max. altitude range for air targets: 11000 m (restriction by self-destruction) Minimum flight altitude: 3-5 m Hub length: 818 mm Grenade length: 355 mm Hub weight: 12.8 kg Grenade weight: 5.9 kg Cartridge weight: approx. 4.5 kg
Time required to transfer elements of fire to another target: 5-10 s Preparation time for firing (from marching to combat position): up to 3 minutes Standby reaction time 1: up to 15 s Max. tracking time: 60 minutes
URL : https://www.valka.cz/SOV-AK-176-76-2-mm-universalni-kanon-t115697#401421
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