Bofors 57 mm Naval Automatic Gun L/60
Bofors 57 mm Naval Automatic Gun L/60 (Swedish: 57 mm sjöautomatkanon L/60 (57 mm SAK 60)), also known as 57 mm/60 (2.25") SAK Model 1950 and the like (full English product name: Bofors 57 mm Automatic A.A. Gun L/60 In Stabilized Twin Turret), was a twin-barreled 57 mm (2.2 in) caliber fully automatic dual purpose naval artillery piece designed by the Swedish arms manufacturer Bofors from the early 1940s to the early 1950s to meet a request from the Dutch Navy. Besides the Dutch Navy, the weapon was also adopted by the Swedish and the French Navy, most predominantly by the latter.
| Bofors 57 mm Naval Automatic Gun L/60 | |
|---|---|
Swedish Bofors 57 mm SAK 60 (57 mm akan m/50) on the destroyer HSwMS Småland | |
| Type | Naval Gun |
| Place of origin | Sweden |
| Service history | |
| In service | 1952–1990 |
| Used by | Dutch Navy Swedish Navy French Navy |
| Production history | |
| Designed | 1950 |
| Manufacturer | Bofors |
| Produced | 1950 |
| Specifications | |
| Mass | Traversing mass: 24 t (24 long tons; 26 short tons) |
| Barrel length | 60 calibres 3.420 m (11.22 ft) |
| Crew | 8 |
| Shell | 57 × 438 mm R (m/50) |
| Shell weight | 2.6 kg (5.7 lb) |
| Calibre | 57 mm (2.2 in) |
| Elevation | -9°/+90°, 30°/s |
| Traverse | -360°, 30°/s |
| Rate of fire | 2 × 130 rounds/min |
| Muzzle velocity | 850–920 m/s (2,800–3,000 ft/s) |
| Effective firing range | 13,000 m (43,000 ft) (max) 5,000 m (16,000 ft) (practical) 5,500 m (18,000 ft) AA ceiling |
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