Paper model of the IS-7 tank

The paper model of the IS-7 tankis an experienced Soviet heavy tank. Developed in 1945-1947, the issue was limited to six prototypes and a small number of pre-production machines produced in 1949. Like its predecessors, designed to break through the powerful defensive lines of the enemy, the IS-7 had good armor. The most powerful tank of its time and the heaviest among Soviet tanks. The Soviet Army was not accepted for service, but many of the solutions that were first used on this tank were subsequently successfully used in production vehicles.

Materials and tools:

  1. scissors, paper knife, drawing ruler
  2. tweezers;
  3. glue brushes and paint;
  4. watercolors (or pencils), toothpicks;
  5. clear acrylic glue ("Moment", etc.);
  6. to print the model matte photo paper with a density of 170-180 g / m2;
  7. for small parts - 70-80 g / m2.

Build Tips:

  1. Before you assemble the part, read the drawings and instructions. Determine the place of each part and imagine its assembly;
  2. Make holes in details before cutting out the part;
  3. Cut only the part (s) you need right now. Unpacked items in a box, and unused sheets in a closed folder (as an option). Throwing out trash after work, carefully inspect the scrap paper;
  4. To better fold the part, it is necessary to hold the ruler along the fold line, pressing lightly with the blunt side of the knife or a toothpick so as not to damage the paper surface. Better to do it from the wrong side of the part;
  5. Keep your fingers clean and be sure to use wipes to wipe your hands, because hands may get dirty in the process;
  6. wind up cylindrical parts before gluing onto a round object of a suitable diameter, this will give them shape;
  7. Before gluing it is necessary to paint the ends of the part. White crop lines spoil the overall look of the model. To paint the ends, use watercolors or gouache paints. After selecting the desired color, apply them in a thin layer, then allow the paint to dry. About markers better to forget;
  8. Take your time with gluing. First, cut out the part, paint it from the end, wait for the paint to dry, assemble the part.Attach it to the place where it should be to make sure everything is done correctly. And only then stick. Do not forget to let the glue dry.

A bit of history

Soviet IS-7 heavy tank

The development of a combat vehicle, now known as the IS-7, began in May 1945, when the design bureau of ChKZ (SKB-2) and Experimental Plant No. 100 (OKB) was assigned to develop draft designs for heavy tanks of powerful armor ( NKTP Order No. 66 of February 5, 1945). A variant of a heavy tank, created in SKB-2 ChKZ under the leadership of N.L. Dukhova, had the index "object 705". In the experimental design bureau of Experimental Plant No. 100, work on the machine, which received the name “object 257” (IS-7), was carried out under the direction of J. Ya. Kotin and A.S. Ermolaeva. However, the tank "object 705" was not embodied in the metal: according to the decree of the Council of Ministers of the USSR № 4752 1832 dated October 15, 1949 (order of the Minister of Transport Engineering № 501 dated October 26, 1949), works on its engine (also , as well as the car as a whole) were terminated.

The project "object 257" was a little more fortunate. Executed in May 1945, it was reviewed and approved by the People's Commissar of the Tank Industry V.A. Malyshev (order NKTP number 312).In the experimental design bureau of Experimental Plant No. 100, in the period from July to September 1945, technical projects of four different types of machines (leading engineers — GN Moskvin and PP Isakov) were prepared according to the classical scheme. The armor protection of the frontal part of the hull was of an original form (a two-edged nose). For further work and the manufacture of prototypes, one of the projects of the tank was chosen, the “object 260”, in two versions: with mechanical and electromechanical transmissions. In the first half of 1946, the LKZ plant was asked to build two prototypes of the tank, and TsAKB to manufacture three 130mm guns for them. In addition, for the successful fulfillment of the government assignment, it was proposed to transfer the Kotin design bureau with a part of the research staff to Leningrad at the Kirov Plant (LKZ) from Chelyabinsk and approve the latter as the chief designer of the plant.

The main ideas embodied in the construction of the EC-7 were:

  • High armor protection of the hull and turret, which protected from firing at point-blank range by armor-piercing shells of cannons of prospective tank and anti-tank artillery
  • Powerful artillery and machine gun armament, which provided real aimed fire at once;
  • High maximum speed combined with overall high maneuverability
  • To solve the problems posed, a number of completely new elements were introduced into the design of the vehicle, which provided it with superiority over all types of tanks available at that time, both domestic and foreign. The transverse profile of the tank hull had the original wedge-shaped form, the most rational of all that existed in armor. The upper frontal part of the body, made in the form of the original double-slope armored hub, was distinguished by increased armor resistance. The differentiated booking of the sides of the hull in height provided good protection for the tank when firing from the side. The tank armament included:
  • Powerful 130mm tank gun C-70 designed by TsAKB, the muzzle energy of which was almost 2 times the muzzle energy of the 122mm tank gun D-25T of the serial IS-3;
  • Powerful machine gun armament, which provided effective protection against enemy infantry during round-up at close range.

Actual aimed fire was immediately provided by a set of precision shooting mechanisms, fire rate and maneuverability of fire —mechanizationoftheloadingprocess.InordertoquicklyputtheRedArmyinservicewiththenewtank,itwasproposedtoinstallablockoftwoB-16dieselenginesinthevehiclesofthefirstbatch.Atthesametime,theindustrywaspreparingfortheproductionofapowerfuldieselengine,whichplannedtoreplacethe"two-wheeldrive".TransmissionTank—manualtransmission— six-speed, with synchronizers, executed on a two-shaft scheme. Hydraulic servos were used to facilitate the control of the main friction and gearbox. An electromechanical transmission was also being developed, which was supposed to be installed in the future instead of a mechanical one. One of the main issues in the manufacture of prototypes of the tank IS-7 was the choice of the power plant, due to the absence at that time of a tank engine with a capacity of 882 kW (1200 hp). Since March 1946, work in this direction has been carried out at several plants of the Ministry of Transport Engineering and the Ministry of Aviation Industry.

The assembly of the first prototype of the IS-7 tank (machine No. 01) was completed on September 8, 1946, but the machines began to be tested at the factory only on September 25, due to the identification of a large number of questionsrequiring the development of design solutions, low degree of readiness of component parts and assemblies, developed by related organizations, the lack of established links between plants for the manufacture of parts for cooperation. In parallel with the running tests, the tank was tested for safety. The tank hull was fired by domestic armor-piercing shells of caliber 152 (gun-howitzer ML-20), 122 (guns D-25 and A-19) and 57 mm (ZIS-2) and German armor-piercing shells of 128 and 88 mm from trophy artillery systems. One shot on the hull was produced by a 122-mm high-explosive fragmentation projectile. During the bombardment of the tower armor-piercing shells of caliber 128 and 122 mm were used. After 83 hits into the hull, the destruction of its welded joints was achieved, and this fact later had a negative impact on the fate of the tank.

The assembly of the second prototype of the IS-7 tank (machine No. 02) at the LKZ was completed on December 25, 1946. Until the end of the year, he passed a control-running run in the volume of 36 km. A motor-transmission block with a TD-30 engine (No. 01-05) and a mechanical transmission was installed on the machine, and in the tower – model of the C-70 gun. By this time, the first prototype of the IS-7 tank (machine No. 01) had already passed 900 kilometers.During the tests, the IS-7 tank was repeatedly demonstrated to the leadership of the VT and MB AF and the Ministry of Transport Engineering of the USSR. October 10, 1946 tank IS-7 (machine number 01) inspected V.A. Malyshev. March 1, 1947 tank IS-7 (machine number 02) was shown to Marshal of the armored troops P.A. Rotmistrov. During this demonstration, the car showed a maximum speed of 55 km / h. The assembly of the installation batch on the LKZ was blocked on June 1, 1948. It was built 2 more tanks (№ 3 and 4) in addition to the first two. All copies of the IS-7 were further refined and tested. However, the mass production of the IS-7 was not started, it was not accepted for service and did not enter the troops. According to the Resolution of the Council of Ministers of the USSR No. 701-270 of February 18, 1949, all work on the IS-7 was stopped. The only surviving IP-7 is on display at the Museum of armored vehicles in Kubinka.



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