349:, was the head of the OKB-520 design bureau of Uralvagonzavod factory (UVZ) in Nizhny Tagil. He was responsible for the T-54A (Object 137G) and T-54B (Object 137G2) modernizations of T-54 main battle tank. After work on the T-54M (Object 139) modernization was abandoned he and his design team started working on a new tank, called Object 140. The new tank had a suspension with six light road wheels made of aluminum. The turret was cast and armed with a 100 mm D-54TS tank gun with the Molniya two-plane stabilization system. The tank carried 50 rounds. The chief designer of the legendary V-2 diesel engine, Ivan Trashutin refused to modify the engine to demanded 580hp specification, so Kartsev turned to Barnaul engine plants chief designer Evgeny Artiemejev. The plant manufactured V-series engines for agricultural and other domestic applications. Artiemejev received the idea well and agreed to develop the 580hp version.
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Soviet Union was able to cast some of the necessary plates, and specific parts on the engine compartment were not serially producible at all. Kartsev mentions that his engineers needed to use a dentist mirror to install exhaust collectors from a hatch below the tank. After few sleepless nights, Kartsev decided to write a letter himself to the
Central Committee, and demand the cancellation of the project. To his surprise, he was agreed and not even punished for wasting 16 million rubles of public money on the project.
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Whilst still feeling moral guilt from his failure, he started working on yet another T-54 main battle tank modernization called the T-55 (Object 155) in which he included one of the key innovations from his Object 140 tank: the upper fuel tanks were fitted with mounts for tank gun ammunition. This
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In 1957 Uralvagonzavod built two Object 140 prototypes which were put on trials soon after. In his memoirs
Kartsev recalled that during assembly and factory tests he became more and more aware that the tank was unjustifiably complicated, difficult to operate and repair. Only one plant in the whole
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After initial prototypes were completed, the weight stood at 36.5t, a half ton over the design specification. Kartsev choose to work the weight down for real, instead of hiding it to the paperwork (a usual procedure among designers of the era). To overcome this, aluminum roadwheels and an aluminum
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engine cover were introduced among other minor modifications. The engine was turned on its lap to the bottom of the hull, a solution which reduced the height of the engine compartment but caused further modifications to the engine and considerably complicated maintenance.
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increased the ammunition load carried by the tank to 45 rounds. The aluminum roadwheels designed for the Object 140 later made it to the T-72 tank.
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medium tank. Two prototypes were completed before the project was cancelled in 1958 in favor of the
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391:Kinnear, James L. & Sewell, Stephen (2019).
435:Abandoned military projects of the Soviet Union
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430:Trial and research tanks of the Soviet Union
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109:Learn how and when to remove this message
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47:adding citations to reliable sources
420:Cold War tanks of the Soviet Union
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425:Medium tanks of the Soviet Union
325:Project, which would become the
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313:developed from 1953 to 1958 in
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16:Soviet experimental medium tank
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395:. Oxford: Osprey Publishing.
393:Soviet T-55 Main Battle Tank
377:Kinnear & Sewell, p. 27
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154:Place of origin
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137:Complete Obiekt 140
179:Production history
402:978-1-4728-3855-1
347:Leonid N. Kartsev
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192:Manufacturer
169:Used by
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99:January 2024
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58:"Obiekt 140"
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41:Please help
36:verification
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281:16.1 hp/ton
271:Model TD-12
205: built
125:Obiekt 140
414:Categories
365:References
323:Object 430
303:Object 140
299:Obiekt 140
69:newspapers
337:designs.
307:prototype
260:mm U-8TS
244:55–240 mm
187:1953–1958
305:, was a
262:tank gun
252:armament
184:Designed
341:History
309:medium
291:55 km/h
221:36 tons
83:scholar
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273:580 hp
268:Engine
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240:Armor
90:JSTOR
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335:T-62
333:and
331:T-55
327:T-64
319:T-54
311:tank
297:The
250:Main
226:Crew
218:Mass
173:USSR
148:Tank
143:Type
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