Object 907

Object 907
Type	Prototype
Place of origin	Research Institute No. 100, Soviet Russia
Service history
In service	Never saw service
Used by	Soviet Union
Production history
Designed	1953-1955
Manufacturer	Research Institute No. 100
Produced	1955
Number built	1
Specifications
Weight	36 tons (Estimated)
Crew	4
Armor	45-228 mm
Main armament	100 mm D-54TS tank gun (45 rounds)
Engine	Model V-12-5U 610 hp
Power/weight	16.9 hp/ton
Speed	55 kph (Estimated)

On 20.5.1952, Ministry of Defense industry of USSR organized a meeting with tank constructors and with the marshal of tank forces, I.S.Bogdanov, to discuss the future of armored forces development. The result of this meeting was a set of tank requirements from 18.6.1952. The resulting tank was to be better than T-54 - that was however no easy tasks and several teams (notably from plants no. 75, 174, 183 and research institute no.100) were tasked to make a preliminary study. The design, produced by the research institute was designated "Object 907" and - as requested - its armor was significantly better than the one of the T-54. From 1954 to 1956 the metal prototypes of the hull and turret were manufactured in order to conduct armor tests and to find ways to improve the protection even more. There two variants of the hull. The first hull was cast as whole, the second was welded from cast components. After the tests, the protection levels of the vehicle were found to be significantly higher than the ones of the T-54 (by as much as 30 percent). The turret was (thanks to its angles) as well protected as the one of the T-10 heavy tank. The vehicle was to be equipped with the 100mm D-10T gun, but there was a plan to install even the 122mm M-62 gun. It was to be propelled by the 700hp B12-5 diesel engine with two transmission types: hydrodynamic (like in T-54) and mechanical (like in T-34). The vehicle stayed in the semi-prototype phase, apparently because by the time it was introduced, the production of T-54 tanks was already underway.