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) | |
|---|---|
| Type | Self-propelled anti-aircraft gun |
| Place of origin | Soviet Union |
| Service history | |
| In service | 1955–early 1970s (USSR) 1957–present (other countries) |
| Used by | See Operators |
| Wars | See Service history and Combat history |
| Production history | |
| Designer | Design Bureaus of Omsk Works No. 174 and Research Institute No. 58 in Kaliningrad, Moscow Oblast |
| Designed | 1947–1954 |
| Manufacturer | Omsk Works No. 174 |
| Produced | 1948–1955 (prototypes) 1957–1960 (serial production) |
| No. built | More than 2,023 (USSR) 250 (North Korea, old turrets on new hulls) ? (PRC, Type 80) |
| Specifications | |
| Mass | 28.1 tonnes |
| Length | 8.46 m with gun in forward position (6.22 m hull only) |
| Width | 3.27 m |
| Height | 2.71 m 2.75 m (with a tarpaulin top) |
| Crew | 6 (commander, driver, gunner, sight adjuster, and two loaders) |
| Armor | 8–15 mm |
Main armament | 2 × 57 mm L/76.6 S-60 anti-aircraft autocannons (57 mm S-68A variant) (300 rounds) |
| Engine | V-54, 4-stroke, airless (mechanical)-injection, water-cooled 38.88 liter V12 diesel 520 hp (388 kW) at 2,000 rpm |
| Power/weight | 18.5 hp/tonne (13.81 kW/tonne) |
| Suspension | individual torsion bar with hydraulic shock absorbers on the first and last road wheels |
| Ground clearance | 425 mm |
| Fuel capacity | 830 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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