Russian tank guns. Eminent EP,

Plant's number 8 at the end of 1931, stuck in a case 37-millimeter anti-tank gun reference 1931 newest 45-mm tube and reinforced carriage. This system in March 1932 adopted the title under the "45-mm anti-tank gun reference 1932" (factory index 19K). Later designers of the plant has been designed installation 19K in the tank, factory index 20K and the title "45-mm tank gun standard in 1932." Tank gun 20K before the PS-2 had several advantages. Increased armor using armor-piercing projectiles, fragmentation has increased dramatically projectile weight (from 645 g to 2150 g) and the mass of the explosive in the projectile has increased from 22 to 118 gr. In the end, due to the introduction of the V-vertical shutter automatically increased rate of fire. But for a semi-automatic debugging took about 4 years old and the first series produced with 20K fourth automation, later with the semi-automatic using armor-piercing shells and fourth automation in the high-explosive shells. Only in 1935 was started with a semi-automatic gun for all types of ammunition. Apart from that gun at 20K had a significant drawback — it does not fit in the small tower BT-2 and T-26. At the theoretical level, the gun can be installed in a tower, but this would have to enter the balancing mechanism and a new linkage, as well throw in the tower only 1 person, because the second room just did not fit. Management at it's gone and tanks BT and T-26 started to produce with larger towers. Accordingly, the T-26 was removed the second tower. First experienced single-turret T-26 kitted 45-millimeter cannon standard in 1932 joined the Research artillery range (NIAP) May 31, 1933

Russian tank guns.  The famous "EP,"
Tank T-26M35 with a 45-mm cannon 20K

The plant number 8 guns 20K executed serially in 1932.

45-mm cannon mounted on a 20K tank BT-5, BT-7, T-26, T-35, T-70, T-80 and armored cars BA-3, BA-6, BA-10, BA-11, PB-4.

On Rembaza № 6 October 25, 1938 have been tested 45-mm tank gun 20K installed on the tank MC-1. The turret of the tank did not make any configuration except for special performances. box for the mask with a gun. Produced 30 shots. The tests were considered a success. Later, several 10-s MS-1 rearmed 45-millimeter cannon 20K and adopted a fortified. There, the tanks were used as self-propelled or buried in the ground and used as pillboxes. As of 22.03.1941, 68 (according to other sources 75) MS-1 tanks filled with 45-millimeter cannon was on the move.

The plant number 8 in 1941 were given an assignment to create a 2664 45-mm tank guns 20K, and the upcoming phase-out was not planned, because they had to arm a new main infantry support tank (T-126SP or T-50).

In 1942, the creation of guns 20K transferred to the plant number 235, where it lasted until 1943 inclusive.

Volumes of production of 45-mm tank guns in different years were: 1932 — 10, 1933 — 2099, 1934 — 2005, 1935 — 2443, 1936 — 2236, 1937 — 1988, 1938 . — 3604, 1939 — 3949, 1940 — 3230, 1941 — 2759, 1942 — 5090, 1943 — 3040. Total was 32,453 guns.

20K modified a couple of times. So, for example, the standard cannon in 1934 differed from the standard gun 1932 device recoil systems, semi-automatic, hoist, etc., and in the gun standard 1938 introduced electric trigger.

Russian tank guns.  The famous "EP,"
Setting the gun 20K in a conical tower of the T-26-1 (sample 1939)

In the 38th, on the part of the tanks BT-7 and T-26 for a 45 — millimeter guns with standard 1938 began installing electric trigger sight "CBT" having a band aiming to stabilize the vertical plane. Stabilization was carried out using a gyroscope suspended in the housing in the head of sight. First World War this system was removed from service due to missing development in the military, operational and structural shortcomings.

It is worth noting that the idea of stabilization tank shells belongs specifically Russia. 02.09.1916, the Commission under the general Manikovsky project could see two-plane gyro stabilizer, a developer who was kammerjunker PP Shilov. The stabilizer was designed for 47-mm single-barrel gun Hotchkiss, which was mounted on an armored car. It was decided to make a prototype of the facility. In 1936, at the Military Academy of Electrical Engineering Workers and Peasants Red Army Christmas project done by an experienced standard Feed mechanism for 45-mm tank guns. The plant number 8 assigned to debug the mechanism and start serial automatic document creation, but the plant during the 2-year delayed the start of a work, and then gave up the job.

Russian tank guns.  The famous "EP,"
20K gun in the turret of a light tank T-50

In THREADS in 1938 on the basis of 45-millimeter cannon 20K made 45-mm automatic cannon tank "VETOG" having a belt fed by the standard 37-millimeter gun "Maxim". Ordnance Department in the same year decided to finish all the work on the "VETOG", "as the plant number 8 is engaged in 45 — and 37-mm automatic cannon. Cannon that will be worked out before, will give for the use of the tanks. "

Fascinating and the work on the 45-mm armor-piercing shells for chemical 19K and 20K. Given shell, tearing the armor, generate poisonous gas that destroyed the armored vehicle crew. In 1934, Scientific Testing artillery range began testing 45-mm armor-piercing projectile chemical "blueprint 180."

Russian tank guns.  The famous "EP,"
45-mm gun in a small turret 20K languid tank T-35

22/02/1938, the Ordnance Department had approved the design TTT 45-mm tank gun has improved ballistics for the new towers tanks BT-7 and T-26. Piercing shell modern guns (mass 1420) was due to punching 40-mm armor at a distance of 1 km at an angle of meetings of 30 °. The initial velocity of the projectile to be equated with 860 meters per second. Sleeve chuck old, in other words, the original speed was assumed to increment by increasing the length of the barrel or the weight of the charge. The vertical guidance from -5 ° to +3
0 °. Weight of the gun was about 400 kg. Implementation of the intended target was completely real, and by 1941 there were new experienced 45-mm cannon with advanced ballistics: Anti 7-1 (plant number 7, the initial velocity of the projectile — 885 m / s), ship's 80-K (plant number 8, the initial velocity of the projectile — 960 m / s). In the design office Shpitalniy began developing a 45-millimeter automatic tank gun with an improved ballistics. But these works were soon gone. Also, the tests were carried out 37-mm automatic gun Shpitalniy installed in the tower T-26. Initially designed as an anti-aircraft gun, but the corners of the vertical guidance to the T-26 ranged from -7 ° to +12 °. 37-mm gun OKB-2 in the series did not go.

In 1942 he made a 45-millimeter PTP standard 1942 (M-42), which differed from the 19K increased length of the barrel to 68.6 calibers. In the OKB-172 on the basis of M-42 in the 42-43's. standards have made seasoned 45-mm tank gun BT-42 and BT-43 with a barrel length 68.6 calibers. Guns BT-42 was created for the T-70 and BT-43 — T-80. These guns were not taken into service.

Russian tank guns.  The famous "EP,"
The tanks of the 1st Guards Tank Brigade in an ambush. On the frontal plane — light tank BT-7, followed by the T-34 is shown. The Western Front
Russian tank guns.  The famous "EP,"
Russian light tank T-70 passes by the destruction of the German medium tank PzKpfw IV. Kursk
Russian tank guns.  The famous "EP,"
Russian light armored car BA-64 is discharged from the captured German high-speed landing barges (BDB) type D. In the Baltic, two such barges «V-31" and «V-1" were captured by Russian troops in 1944 in Vyborg offensive and were included the Baltic Fleet
Russian tank guns.  The famous "EP,"
English and Russian armored column BA-10 in Iran. September 1941

According to the article by Alexander Shirokorad, the magazine "Arms and equipment"

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