Paper model PT-SAU ISU-152

Paper model PT-SAU IMS-152 - (Object 241)- Soviet heavy self-propelled artillery installation (SAU) during the Great Patriotic War.

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 ISU-152 fighter-self-propelled unit

At the initial stage of the Great Patriotic War, the heavy KV tank was a formidable opponent for the Wehrmacht armored forces.However, he practically had no potential for modernization, therefore by 1943 the issue of KV was going to stop. It should have been replaced by the IS-1 tank. However, there was one problem: a heavy self-propelled gun SU-152 was produced on the base of the KV, which the army was in dire need of. In June 1943, the design bureau of the Chelyabinsk plant began work on the creation of a new automatic control system. Managed the development of Josef Yakovlevich Kotin.

The base of the new self-propelled gun was quite naturally the IS-1 tank. Technical requirements for the car included an increase in frontal armor up to 100 mm, the maintenance of 152-mm guns, the addition of cannon weapons and machine guns, improved visibility and ventilation. The work had to be completed by the beginning of July 1943, but the designers had time earlier. They spent a few weeks on the creation of working drawings, and in early July they began to build a prototype. At this stage the self-propelled gun received the IS-152 index.

According to different researchers, the first demonstration of experimental machines took place on July 31 or August 31, 1943 at the Ivanovskaya Square of the Kremlin. Stalin, Beria, Molotov, Voroshilov came to get acquainted with the new technology.In order to ensure the safety of such significant people, the NKVD decided to replace all the crew members, except the driver, by the officers of the bodies. Stalin, greatly interested in the new self-propelled gun, decided to examine the car more closely. Looking into the fighting compartment, Iosif Vissarionovich inquired whether the problem with poor ventilation was solved on the IS-152. Naturally, the workers of the NKVD could not answer, because they did not understand the issues of the operation of armored vehicles. The Mechanics Committee intervened in time, who reported to Stalin that an additional fan of the fighting compartment was provided for in the design of the ACS. After inspecting the car, Joseph Vissarionovich approved it, and in November 1943 the State Defense Committee issued a decree on the adoption of weapons.

By this time, the first prototype of the self-propelled unit, which had the working name "Object 241", had already passed the factory and field tests. It was he who became the benchmark for the production of serial SAU. A new combat vehicle entered service under the ISU-152 index. From the point of view of design, the self-propelled gun was the sum of the decisions for the IS-1 tank and the SAU SU-152. &Nbsp;

From the tank ISU-152 borrowed the chassis: the same six twin rollers, rear wheel drive and independent torsion bar suspension.And from the SU-152, the new ACS got a howitzer ML-20C of the 1937/43 model. The ammunition 152-mm guns included armor-piercing and high-explosive shells. If necessary, part of the shots was replaced by concrete-concrete charges used to destroy enemy pillboxes. The work of the ISU-152 loader was very hard, as he had to turn 40 kg shells alone.

On the self-propelled gun was installed diesel engine V-2-IC with a capacity of 520 liters. from. He allowed the car to reach a speed of 35 km / h on the highway. Cross-country terrain ISU-152 traveled much slower —just10– 15 km / h. However, she did not need to set speed records, because this machine was not intended for rapid throws.

Production of ISU-152 began in November 1943. The new SAU was extremely similar to its predecessor, the SU-152. Due to this, the pace of construction was so high that in a month it was possible to begin the formation of the first heavy self-propelled regiment equipped with these self-propelled guns. Moreover, by the spring of 1944, the release of armored hulls of the new ACS exceeded the capabilities of gunsmiths for the production of the ML-20S howitzer. The understaffed cars decided to arm with a 122 mm gun. So there was another heavy self-propelled unit — ISU-122.

Starting its military way in the spring of 1944, the ISU-152 proved to be effective and universal combat vehicles. They were used as an assault gun to support tanks and infantry, and as a fighter of enemy tanks. However, the separate loading of the gun was a serious drawback, because of which the self-propelled gun was never able to become a full-fledged means of exterminating enemy tanks. Although the reputation of a formidable enemy armored vehicles ISU-152 deserved. In the Soviet troops it was even called "St. John's wort", and in German — "Dosen & of ffner" (can opener).

An example of how effectively ISU-152 is capable of fighting enemy tanks is the battle of the 1st Guards Army of Katukov near the town of Nizhnyuv in Transcarpathia. The fascists by forces of 40 tanks "Panther" broke through the combat formations of Soviet soldiers and threatened to reach the city of Chernivtsi, surrounding Katukov's troops. In order to prevent this, the ISU-152 regiment took up the height in the most tank-dangerous direction and fought off the advancing Nazis for several hours. In the end, the Germans withdrew, losing about 30 tanks.

Self-propelled guns of this type proved to be very good in urban battles.The most powerful high-explosive fragmentation shells of 152-mm howitzers often allowed literally one shot to eliminate the resistance of the enemy entrenched in houses. To protect the vehicles from soldiers armed with faust-cartridges, SAUs were used as part of assault groups along with infantry cover.

But with all its advantages, the ISU-152 had a number of shortcomings. Installing an additional fan (the one about which it was reported to Stalin) did not eliminate the problem of excessive gas pollution in the fighting compartment. During intensive firing inside the car there was literally nothing to breathe from the powder gases. Due to the inconvenience of the panoramic sight, the gunner was difficult to ensure effective destruction of targets at a distance of over 900 meters. Fuel tanks, located inside the hull, created a risk for the crew to burn alive if they were damaged and increased the likelihood of complete destruction of the SAU as a result of the detonation of fuel vapors. Burning diesel could also spill onto the floor of the fighting compartment. Fortunately, as noted in the documents, the fires on ISU-152 were extinguished relatively easily.

But even the totality of all these shortcomings could not outweigh the positive qualities of self-propelled guns. ISU-152 for a long time was in service with the army of the USSR. The last episode of the combat use of this machine was the suppression of the Hungarian uprising in 1956. It is worth noting that the Soviet commanders in the first stage of the fight against the rebels did not show their best, leading to a loss of about a dozen ISU-152, mainly from petrol bombs. The exact loss figures have not yet been established. After the events in Hungary, self-propelled guns of this type no longer participated in the battles, but were often involved in exercises and maneuvers.

The last ISU-152 were removed from the arsenal of the Soviet Army in 1972.

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