Airborne Forces - B-11 recoilless gun
- defeat / destruction tanksenemy armored and unarmored ground equipment;
- defeat / destruction of enemy personnel and weapons, both in shelters and outside shelters;
- defeat / destruction of various types of DOS / DZOS direct fire;
- creating aisles for their own infantry units in wire-type obstacles.
The development of the recoilless 107mm gun began at the end of the 1940-s under the direction of B.Shavyrin in SKB-4. The work was carried out on the basis of the B-10 gun, a similar design and principle of operation was used, which greatly simplified further mass production. The gun entered the troops in 1954 year as a recoilless gun B-11 caliber 107mm. The main manufacturer of the Tula machine-building plant. It was in service with the airborne and subdivisions. Delivered abroad in the Warsaw Pact states, China, Egypt, Cambodia and Vietnam.
Device and construction
Gun B-11 consists of a barrel, bolt, bed and aiming mechanisms. The barrel is made without autofretching, has a smooth channel with an end thread for the transport hook. The hook is connected to the truck during transportation, and special handles are made to manually roll it on the hook. In the middle of the barrel positioned holder for mounting the frame front location and sheet pile for mounting the frame and sight. The breech section has a charging chamber with a breech, connected shutter, valves and parts of the trigger mechanism. The gate valves serve to prevent the ammunition that is placed in the rear chamber from falling out when the barrel of the weapon for firing is raised at a large vertical angle.
The shutter consists of:
- impact mechanism;
- trigger mechanism;
- extractor;
- replaceable ring.
The extractor serves to eject the charging system after the shot is made, the replaceable ring with 2 holes serves to form a nozzle throat. When firing a shot, some of the gases pass through the nozzle orifice in the opposite direction of movement of the munition along the barrel, thus providing a recoilless shooting effect. The opening of the jam occurs on the left side, for which you must first press on the handle of the mechanism for unlocking / locking the shutter.
The barrel is located on the tripod frame and is connected to it by a hinge. Both rear supports of a fixed version and a front movable support, a wheel axle with 2 wheels (wheels are located on rotary rollers with springs) and guiding mechanisms are attached to the frame of the bed. The handle of the turning mechanism is located on the left side of the gun, the handle of the lifting mechanism is located directly under the barrel.
Used sighting device - PBO-4. Attached is lighting equipment. As an additional (emergency) sighting device, a mechanical frame sight is used, which makes it possible to conduct aimed fire at a distance of up to 1.2 kilometers. The sight of the PBO-4 is provided with 2.5-fold magnification from the field of view to 9 degrees, shooting direct fire - a threefold increase from the field of view to 18 degrees.
For destruction of equipment and structures used cumulative ammunition BK-883 (MK-11), with an effective range up to 1.4 kilometer with armor penetration to 381mm. For the destruction of the personnel of enemy units used high-explosive ordnance O-883A (MO-11) with a maximum range of 6.6 kilometers. The shells are drop-shaped and equipped with a GK-2 fuse, charging system with a centered disc, main charge, primer and additional charge.
Due to the applied recoilless shooting method, when fired, the powder gases are ejected away from the gun at 90 degrees and this creates a hazardous area with a length of up to 40 meters. Recoilless gun B-11 can be transported at speeds up to 60 km / h, carry out transportation manually. The gun is transferred in parts - the trunk, the frame and the wheel part.
Main characteristics of the B-11:
- maximum length up to 3.5 meters;
- maximum width up to 1.45 meter;
- height - 0.9 meters;
- combat weight - 305 kilogram;
- line of fire - from 710 to 1200mm;
- ground clearance - 32 centimeter;
- wheel travel - 1.25 meter;
- direct fire shooting (cumulative projectile) - 450 meters;
- The maximum range of fire - 6.65 kilometers;
- the initial speed of CS / OFS is 400 / 375 m / s;
- weight characteristics: barrel / frame / wheel travel - 128 / 101 / 37 kilograms;
- weight characteristics of ammunition KS / OFS - 7.5 / 8.5 kilogram;
- The mass of the charging system - 5 kilogram;
- pointing angles vertical / horizontal to 45 / 35 degrees;
- translation into combat / marching position - 60 / 60 seconds;
- firing speed up to 5 vyst / minutes;
- weight PBO-4 - 2.3 kilogram;
- calculation - commander, gunner, shells carriers and loader (5 people).
Information sources:
http://russianarms.mybb.ru/viewtopic.php?id=993
http://cris9.narod.ru/rva_b11.htm
http://zw-observer.narod.ru/books/cannon/107-mm_recoil_gun_B_11.html
Information