57mm ZIF-31


AK-257 | China: Type 66


Overview

57mm ZIF-31

57mm ZIF-31 naval gun mount on display in a museum.
Source: Andrey! - © Public domain

Origin
Soviet Union
Type
Naval gun
Entered service
1958
Status
Obsolete
Development
1954
Developer
Soviet Union - TsKB No.7 named after M.V. Frunze
Production
1954 - Mid 1960's
Producer
Soviet Union - No.7 "Arsenal" plant
China
Number produced
About 510 ZIF-31
About 300 Type 66
Designations
AK-257 (Soviet service)
Type 66 (Chinese production model)
Notable users
Soviet Union
China

Details

Facts 57mm ZIF-31
General
Origin
Soviet Union
Type
Naval dual purpose gun turret
Ordnance
Type
2x 57mm L/75 autocannon
Rate of fire
120 rpm cyclic per gun
240 rpm cyclic combined
Volume of fire
Maximum of 50 round burst before cooling for 1.5 minutes
Range
4.5 km anti aircraft
8.5 km against surface targets
Muzzle velocity
1.020 m/s
Mount
Feed mechanism
3 round clips loaded by hand
Ammunition
57x348mm SR
Traverse
-200° to +200°
Traverse rate
30°/s powered
5.4°/s manual
Elevation
-10° to +75°
Elevation rate
25°/s powered
5.4°/s manual
Operation
Crew
5 or 6 on mount
Fire control
Fut-B radar for ZIF-31 and ZIF-31S
AMZ-57-2 optical sight for ZIF-31B and BS
Mount type
Open gun mount
Armor
6 to 8 mm steel
Dimensions
Weight
10.8 t empty for ZIF-31B
Radius
4.46 m with guns horizontal
Length
6 m
Height
3 m
Width
3.6 m

Media

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