ZSU-57-2

The ZSU-57-2 Ob'yekt 500 is a Soviet self-propelled anti-aircraft gun (SPAAG), armed with two 57 mm autocannons. 'ZSU' stands for Zenitnaya Samokhodnaya Ustanovka (Russian: Зенитная Самоходная Установка), meaning "anti-aircraft self-propelled mount", '57' stands for the bore of the armament in millimetres and '2' stands for the number of gun barrels. It was the first Soviet mass-produced tracked SPAAG. In the USSR it had the unofficial nickname "Sparka", meaning "twin mount", referring to the twin autocannon with which the vehicle is armed.

ZSU-57-2 (Ob'yekt 500)
TypeSelf-propelled anti-aircraft gun
Place of originSoviet Union
Service history
In service1955–early 1970s (USSR)
1957–present (other countries)
Used bySee Operators
WarsSee Service history and Combat history
Production history
DesignerDesign Bureaus of Omsk Works No. 174 and Research Institute No. 58 in Kaliningrad, Moscow Oblast
Designed1947–1954
ManufacturerOmsk Works No. 174
Produced1948–1955 (prototypes)
1957–1960 (serial production)
No. builtMore than 2,023 (USSR)
250 (North Korea, old turrets on new hulls)
 ? (PRC, Type 80)
Specifications
Mass28.1 tonnes
Length8.46 m with gun in forward position (6.22 m hull only)
Width3.27 m
Height2.71 m
2.75 m (with a tarpaulin top)
Crew6 (commander, driver, gunner, sight adjuster, and two loaders)

Armor8–15 mm
Main
armament
2 × 57 mm L/76.6 S-60 anti-aircraft autocannons (57 mm S-68A variant) (300 rounds)
EngineV-54, 4-stroke, airless (mechanical)-injection, water-cooled 38.88 liter V12 diesel
520 hp (388 kW) at 2,000 rpm
Power/weight18.5 hp/tonne (13.81 kW/tonne)
Suspensionindividual torsion bar with hydraulic shock absorbers on the first and last road wheels
Ground clearance425 mm
Fuel capacity830 L (including two externally mounted fuel tanks, 95 L each)
Operational
range
420 km (road)
320 km (off-road)
Maximum speed 50 km/h (31 mph) (road)
30 km/h (off-road)
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