Heavy tank KV-3 (Object 223)

The heavy tank KV-3 was another attempt to strengthen the power of the Russian designers of machines of this type through the use of thicker armor and more than a massive gun. The basis for the project was the tank KV-2, which is actually a self-propelled gun. Despite the fact that the 152-mm gun-howitzer M-10 has excellent ballistic characteristics to be very weighty for the installation of revolving turret mounted on a tank chassis everyday. Ultimately DP Pavlov, head ABTU recommend finish in the 1941 creation of the KV-2 in favor of the tank, which will develop a 122-millimeter cannon. But this caliber guns adapted to be mounted in the turret, while it was not simple. Choice was made in favor of the developed not so long 106.7-mm gun F-42 (ZIS-6).

In accordance with the decision of the Central Committee of the CPSU (b) and SNK number 548-232ss from 15.03.1941 was instructed to create heavy tank Tower and the frontal part of the body which will have a book of 115-120 mm. It was planned that the tower will be stamped, the angles of inclination of 30 degrees and adapted for the installation of 107-millimeter cannon. More specific requirements defined in the decree number 827-345ss. This decision determines the characteristics of the KV-3 also posed little problem for the design of super-heavy tank KV-4 and KV-5:

"On the KV-3.
1. Amending Decree of the Council of People's Commissars of the USSR and the Central Committee of the CPSU (b) № 548-232ss from 03.15.1941, the order:
a) establish the armor of the KV-3: tower 115 mm, 115-120 mm forehead;
b) to equip the tank KV-3 107-mm gun ZIS-6, the initial velocity of the projectile — 800 meters per second.
2. Tower tank KV-3 manufactured by punching at angles of 30 degrees at the installation 107-mm gun ZIS-6. Why would someone Zaltsman director of the Kirov factory:
a) to 15/04/1941 was done with Izhorskij and the drawings to give him a modified turret and hull tanks KV-3;
b) to 04/25/1941, the show along with Izhora factory layout of the tower of the KV-3 for the approval of the People's Commissar of Defense.
3. Kirov factory to create a plan to establish in 1941, 500 KV-3 filled with 107-millimeter cannon ZIS-6.
4. Comrade Salzmann director of the Kirov factory, to take control and note that:
a) Izhorskij plant must pass before 05/20/1941, the Kirov Plant first body KV-3, and a tower stamped with the full booking artillery systems and machining. Izhora factory in the upcoming release, and must provide data processing buildings and towers on the release schedule of the KV-3, which was approved by the Government;
b) People's Commissariat of arms (fellow Vannikov), plant number 92 (comrade Yelyan) as chief designer at the factory number 92 (comrade Grabin), together with the Kirov Plant must create drawings mounted 107-mm gun ZIS-6 in the turret and 30.05. 1941 to present the People's Commissar of Defense of the USSR for approval;
c) to 25/05/1941, the plant number 92 must pass Kirov factory 107-mm gun ZIS-6 curb mounting details, set in the tower of the KV-3, and to work together with the Kirov Plant armor protection systems;
g) the plant number 92 IEC should ensure the transfer of the Kirov factory 107-millimeter guns ZIS-6 on the program from 41 th year in subsequent periods:
July — 45 pcs.
August — 80 pcs.
September — 110 pcs.
October — 110 pcs.
November — 110 pcs.
and up to December 15 — 65 pieces. "

general views KV-3 with 107-mm gun

The new tank on the documentation held by the designation "Object 223", but later was used designation KV-3.

Lock and the first prototype of the KV-3 was launched in the spring of 1941. For the latest artillery system, which does not fit into the tower serial KV-1, had to start the development of the modern, which has broad shoulder straps. In addition, the tower acquired a conical shape, which increases snaryadoustoychivost tower. Because of the increased weight had to lengthen the chassis due to the addition of the 1st track roller and the fourth roller supports. With all this, the important units of the tank, such as suspension, engine, transmission, and cooling and lubrication systems with little or no configuration fled from the KV-1. For much potyazhelevshey machine this "continuity" for the benefit would not have gone, especially when you consider the operation prepyadstviya KV tanks of the first series, but in the course of designing and building this factor influenced indirectly.

Decoupling stories with assault KV-3 having on equipment 106.7 — millimeter gun, there was a very sudden. When the chassis and running gear were actually prepared, issued an order to cease its. In Armor Management felt that the ZIS-6 — gun high power — not suitable for KV, because there are plenty 76.2-mm guns of various types. Information intelligence confirmed that the Germans did not have tanks, which are comparable to HF, and means "three" enemies worthy of late will not have. It seems to be neither justified V. Grabin, a developer of ZIS-6, which is a heavy assault tank must be equipped with large-caliber weapon, controlled armored troops outlook was not changed. The proposed later option with 122-mm howitzer developed by a group of engineers led by N. Chicken, was also in demand. The main argument was the presence of a heavy KV-2 in the army, which was equipped with 152.4-mm howitzer M-10.

longitudinal section of the KV-3 with a 107-mm cannon

So Makarov, the Russian version of "tiger" in the 41 th year and has not done so. What turned this step, the management of armored troops found out in 1942, when it appeared on the front of the German tanks, kitted out 75 — and 88 — millimeter long-barreled guns.

As a result, the tank KV-3 has no tower remained LCZ wait the subsequent fate. When war broke out, he offered to install on the tower of the KV-1 curb the F-32. Prior to the war in the tank KV-3, taking into account operating experience languid tanks mass production planned to install the new engine and gearbox, but do not have time. The result is a fascinating "hybrid" HF has thicker armor and standard weapons. Tank 16 October 1941, held in the documentation of the military office under the designation KV-220-2, was sent to the disposal of the 124th Armored Brigade. That's what happened to him in the forthcoming (from the memoirs of D. Osadchy, the brigade commander)

"Our team won the fall of 1941 at the completion of KV tanks. One of them was named" For the Motherland. "This tank was made at the Kirov plant in one piece. It has the same capabilities as the standard HF, but was equipped with heavy armor Protected weight of more than 100 tons and more than a powerful engine kitted turbine. During the movement of the upper gears tank engine whistle and this was like a whistling whistling dive "Junkers." the first time after the tank were armed during its movement even in the brigade received a signal "Air". received my tank was a company commander, and at first it wanted to appoint me, but later appointed him commander of my deputy, Lieutenant Yahonin — the most experienced soldiers. Tank for enemy artillery was considered virtually invincib
le. His main purpose was assault fortified positions.

In December, 41-year (to the chagrin of a clear date can not remember) our brigade was ordered to break through German defenses at the site of Ust-Tosno — F / A bridge to cross the river and develop Tosna coming to Mga interacts with parts of the 43rd Infantry Division. First echelon attack were: 2nd Tank Battalion (commander — Major Pankin), a tank platoon of the 1st Battalion of my company, as a tank "For the Motherland". In this battle, put the puzzle before the tank to capture the railway bridge over the river Tosna and detain a foothold until the main forces. Real unfolded over open countryside. The upper layer of peat spruce stood tank. When the tank "For the Motherland" came to the bridge very tightly, the Germans met his languid fire guns, and then lost radio contact with the tank. At this time I was on the team Fri battalion. When your connection, I attempted to wade along the railway embankment to the place of battle. When I did it, I saw that the entire crew died and a tank hit by a tower. "

Osadchiy, determining the weight of the tank, made a mistake — a 100-ton HF is not built, although he was very close to the truth. As for the loss of the KV-3, it is likely to hit the tank 150-mm projectile, resulting in ammunition exploded. In any case the mention of this machine is the latest. After that, the projects languid tanks, armed with 107-mm gun, not vorachivalis.

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