Comparing: VK 36.01 (H) vs. O-I

An experimental German WWII heavy tank developed by Henschel. The vehicle was a further development of the VK 30.01 (H) project and a stage in the design process for the Tiger. A total of eight chassis and one prototype were built in 1942. During the development, various technical solutions were trialed. Some of them later served as a basis for German heavy tank designs during the WWII. The chassis was also used in armored recovery vehicles.

Development of the superheavy tank was started after the Battles of Khalkhyn Gol in 1939. The vehicle was designed as a maneuverable fire unit that was unprecedented in scale—its hull alone weighted 100 tons. Only one prototype was built, without a turret and made of construction steel. Trials were discontinued due to the unreliable engine; at the end of 1944, the prototype was scrapped. The 15-cm howitzer was to be mounted on the tank after the assemble.