Tank Object 279 was a Soviet experimental heavy tank developed at the end of 1959.
The tank was developed at the Kirov Plant in Leningrad by a group headed by the engineer L. Troyanov. The work on the tank started in 1957, which was based on a heavy tank operational requirements developed in 1956, and a pre-production tank was completed at the end of 1959.
This unique tank boasted increased cross-country capability. It featured four-track running gear mounted on two longitudinal, rectangular hollow beams, which were also used as fuel tanks. The tank suspension was hydro-pneumatic with complex hydrotransformer and three-speed planetary gearbox. The track adjuster was worm-type. The specific ground pressure of this heavy vehicle did not exceed 0.6 kg/cm2. The track chain, running practically along the whole track length provided for increased cross-country capabilities on swampy terrain, soft soils and area full of cut trees, Czech hedgehogs, antitank obstacles and the like.
The tank was equipped with the powerful 1000 hp 2DG-8M diesel engine, enabling the 60 metric ton tank to attain 55 km/h speed, with active range of 300 km on one refuel. It also had auto fire-fighting systems, smoke laying equipment and a combat compartment heating and cooling system.