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}} The SU-100 (''Samokhodnaya ustanovka'' 100) was a Soviet casemate-style tank destroyer armed with a powerful 100 mm anti-tank gun. It was used extensively during the last year of World War II and saw service for many years afterwards with the armies of Soviet allies around the world.〔 == Development == The SU-85 was developed from the same chassis as the T-34 tank, but replaced its turret with a casemate-hulled installation allowing larger guns to be fitted. This was used with the 85 mm D-5 gun, providing dramatically upgraded firepower compared to the T-34's 76.2 mm models. Introduced to service in 1943, the SU-85 was quickly rendered obsolete when designers managed to mount the same gun on the T-34-85.〔 This led to efforts to up-gun the SU-85 as quickly as possible. Development was conducted under supervision of L. I. Gorlitskiy, chief designer of all medium Soviet self-propelled guns. The work started in February 1944 and first prototype of SU-100, called "Object 138", was built in March. After intensive testing with different models of 100 mm gun Soviet engineers approved the D-10S gun for mass production.〔 This gun was developed in Constructors Bureau of Artillery Factory No. 9 under guidance of F. F. Petrov. After the Second World War this gun was installed on T-54 and T-55 tanks and its derivatives were in service forty years after initial development. It was built at the UZTM (Russian abbreviature УЗТМ for Уральский Завод Тяжелого Машиностроения – Ural Heavy Machinery Factory, also called ''Uralmash'') in Yekaterinburg. The SU-100 quickly proved itself to be able to penetrate around of vertical armor from a range of and the sloped front armor of the German Panther from .〔 The hull of SU-100 had major improvements over the SU-85; the thickness of the front armour was increased from , and the commander's workplace was made in a small sponson on the right side of the hull; combined with the commander's cupola this improved the commander's effectiveness. Its German casemate-hulled ''Jagdpanzer''-family counterparts — the Jagdpanzer IV, Jagdpanther and Jagdtiger, by comparison lacked this key piece of observational equipment giving the SU-100 far better situational awareness. For better ventilation two ventilator units were installed, instead of only one as in the SU-85. Mass production began in September 1944. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SU-100」の詳細全文を読む スポンサード リンク
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