The T169 featured a hydrospring gun recoil system. The gun was mounted to the T169 mount located inside the vehicle's oscillating turret, which allowed for a maximum of 15 degrees of gun elevation or -8 degrees of depression by shifting the turret structure up and down rather than the gun itself. The T57 was armed with the 120 mm T179 rifled tank gun, a derivative of the T123E1 gun found on the failed T43 tank. When multiple problems were discovered in the turret oscillation system on account of the excess weight of the heavily armored turret and the gun, the project was dropped.ĭesign Armament T57 cutaway turret schematic Experiments were also conducted to investigate mounting a 203 mm gun, but this was soon found to be infeasible. Like the French AMX 50 project, it was to feature an oscillating turret and was also to receive a 153 mm gun. Armor on the hull front was to range between 5–8 in (130–200 mm) in thickness and the turret was to be 5.98 in (152 mm) at maximum on all sides. Featuring heavy armor and a long range 120 mm rifled gun, the T57 was supposed to serve as a replacement to the M103 in service with American heavy tank units in Europe. The T57 heavy tank was an experimental heavy tank developed by the American military during the Cold War era as a further development of the M103 heavy tank.
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