The Panzerkampfwagen VI “Tiger I” was, undoubtedly, the most advanced tank of those created in the first half of World War II. After Germany commenced it's advance through the Soviet Union, the Germans realized that despite the advantages of the Pz.Kpfw. III and Pz.Kpfw. IV vehicles such as visibility, ergonomics and quality of manufacturing, they had nothing that could compete with the heavily armoured KV tanks. The Germans needed a heavy tank that could reliably destroy any Soviet competitors and was capable of pushing its way through any defensive formations. Two leading manufacturers presented their projects for tender: “Henschel & Sohn AG” and “Porsche AG”. Ferdinand Porsche was so sure that his prototype would be chosen after the tests, that he ordered production to start on the chassisbefore the tests had even started. But German generals and Hitler himself gave preference to the “Henschel” design, noticing how positively its Schachtellaufwerk suspension influenced the accuracy in motion and the vehicle’s cross-country performance. However, the Porsche turret was used for the new tank, and the unused chassis were adopted to create the heavy “Ferdinand” tank destroyer.

By the middle of the 1942 it became obvious that even the “Tiger’s” abilities were not enough for the prolonged war on the Eastern front. The very same design bureaus presented their heavy tank projects codenamed VK 4502(P) and VK 4502(H) for a new tender, Erwin Anders’ creation came out victorious again. The Panzerkampfwagen VI Ausf. B “Tiger II” or “King Tiger” was produced in two main modifications: with a streamlined “Porsche” turret and with Anders’s turret, notable for its 180mm thick armour plate. Its main weapon was the 8,8 cm Pak 43 (StuK 43) gun. Until the end of the war the Allies never managed to create a mass produced fighting vehicle capable of withstanding its AP shell hit.

The USSR engineers were going neck and neck with the Germans, but did not try to create expensive state of the art war machines, focusing on simple and easy to reproduce designs instead. In the early 1943 the high command set a task to create a new vehicle based on the existing KV-1 and KV-13. The work was in full swing when the Soviet military experts managed to examine some of the “Tigers” captured during the Kursk battle and reported that none of the existing tank guns could reliably penetrate its frontal armour. It turned out that the new tank needed a more powerful gun, so the designers had to rework the turret, change the vehicle’s internal composition, add an additional wheel. The IS-1 received a new 85mm D-5T gun and the IS-2 that reached mass production one year later was equipped with a massive 122mm D-25T gun. Both tanks played a major role in the battles of the last two year of the war, particularly shining in the city assault operations.

After the end of the WW2 the IS series continued its evolution. Two models reached production: the IS-3 and the IS-4. The first one was notable for its unusual yet rational armouring; three 110mm armour plates joined in a star formation with optimal angles and a flattened turret made it almost impossible to penetrate the tank from the front. The IS-4 had a more conventional design; it used more thick armour, but this change reduced its power-to-weight ratio and harmed the tank’s reliability.

The War Thunder team