The heavy tank KV-9

First months of the war Russian majestically clearly demonstrated successful concept languid tanks with massive weaponry. KV-1 tanks during this period represented a severe threat to the majority of German armored vehicles and once this had been "too tough" the bulk of the German anti-tank weapons. But for some tasks weapons tanks KV-1 in the form of a 76-mm gun was missing. The available as tanks KV-2 with a 152 mm caliber gun produced in apparently missing quantities. As a result, Tanks HF 2 is collected seven times less than KB-1. Hardly three tanks with excessive with strong gun could change the situation on the fronts. Small rate of output KV-2 did not cover the needs of the Red Army in the so-called assault tanks. Because the November 41th design office Chelyabinsk Tractor Plant has been entrusted to a new multi-purpose tank, able to beat both the armor and fortified enemy.

Heavy tank KV-9

For the base of the tank "Object 229" were taken to the unique design of the KV-1 and KV-2. From the second version of the "HF" was derived chassis with a 600-horsepower diesel engine, torsion bar suspension and sufficient for the tank features languid stroke. It was set a little modified tower KV-1. First configuration for the size window to set the gun. In addition, the situation has changed some devices inside the tower. And these changes are a consequence of the installation of a new instrument. In accordance with the purpose of assault "Object 229" was changed body armor protection. Thus, the thickness of the front plate was increased to tremendous for those times 135 mm. Another huge thick brow acquired the tower. Assault on the new tank this option equated 210 millimeters.

As the lead instrument "Object 229" at the very beginning of the design was proposed gun U-11. This 122-mm tank howitzer created from July 41 th, at the design bureau of the Ural Machine-Building Plant under control engineers and N. Sidorenko Usenko. The aim of the design was to create a work of a promising type of weapons with which one could significantly improve the properties of existing military tanks KV-1. With all of this breech of the gun was bound to fit in the turret. Requirements in size somewhat complicated the work of engineers, but by September, the month they were able to eliminate all the difficulties and hiccups. At the same time the military-political leadership of the country approved a continuation of the U-11 and gave the order to build a test batch of these guns. In December, he assembled the first reference.

Heavy tank KV-9

Prior to April of next year at the experimental production plant number 9 was manufactured 10 new howitzers, two of which were sent to other factories for use in the testing of new tanks. Delivered by CTZ instance was installed in the tower modifed KV-1 and the resulting "Object 229" was sent for tests. Tank tool separate loading has been sufficiently brought before the test batch production, special problems because the testers did not have. U-11 howitzer was developed on the basis of the M-30 gun and had similar ballistics with him. Because for the shooting of the U-11 used 122-mm ammunition, which were created for the M-30. In laying the tank "Object 229" fits within 48 shells and liners. The loading was done manually by individual crew members. The suspension system helps to build his gun in a circle in the horizontal plane by the rotation of the tower and in the range from -4 ° to +19,5 ° in the vertical plane. The gun was equipped with a telescopic sight TMPD, which allows you to fire at ranges of up to 1,300 meters.

Begun in the spring of 42 th tests of the new tank proved the correctness of the chosen path. Massive weapons allowed "Object 229" great fight with all the available at Germans types of armored vehicles, and in addition tool U-11 was comfortable for the destruction of long gun emplacements, bunkers and other fortifications. But in the process of testing more than once appeared a problem with recoil device. This node U-11 howitzer was designed almost from scratch and had a significantly smallest size compared with other guns recoil device. The testers and engineers Chelyabinsk Tractor Plant, joined forces with the designers' Uralmasha "still able to cope with the" childhood diseases "howitzers and tank tests have been successfully completed. The Commission, to monitor the tests "Object 229", recognized the project successful and recommended it for adoption by the arms. There was even coined a new index — in accordance with the established tradition of naming languid tanks, "Object 229" was renamed KV-9.

Heavy tank KV-9

According to initial plans, adopted immediately after the issuance of advice, Chelyabinsk Tractor had to make a pre-series batch of 10 tanks KV-9. It was supposed to be applied to all experienced U-11 howitzer. But for a number of circumstances of different nature has been collected only one pre-series tank. In 1-x, the plant number 9 could not go to the creation of new tools quickly and without sacrificing other products, in-2, began to change in the eyes of the command role languid tanks. In the end, going full speed the creation of self-propelled gun SU-122 and the start of production of the tank with the same weapon was considered unprofitable. The "Object 229" was closed, and the efforts of the design office CTZ were redirected to other, more promising direction.

Heavy tank KV-9

According to the materials of websites:
http://redtanks.bos.ru/
http://battlefield.ru/
http://armor.kiev.ua/

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