Bofors 283 mm M/12 naval gun

28 cm kanon M/12
Aft 283 mm gun turret on the coastal defence ship HSwMS Gustav V
Type	Naval artillery
Place of origin	Sweden
Service history
In service	1916–1957
Production history
Designer	Bofors
Designed	1912
Manufacturer	Bofors
No. built	12
Specifications
Mass	44.1 t (43.4 long tons; 48.6 short tons)
Length	12,735 mm (41 ft 9 in)
Barrel length	12,295 mm (40 ft 4 in) (45 caliber)
Shell	305 kg (672 lb)
Caliber	283 mm (11.1 in)
Elevation	-10°/+20° (5°/s)
Traverse	150° from either side of centreline (4°/s)
Rate of fire	3-4 rpm
Muzzle velocity	860–870 m/s (2,800–2,900 ft/s)
Maximum firing range	19,600 m (21,400 yd) (25,000m post 1930's)

The Bofors 283 mm M/12 naval gun was a naval rifle of 283 millimetres (11.1 in) and 45 calibers used as the main battery of the Swedish Sverige-class coastal defence ships. It was designed and built by Bofors a few years before the First World War.

• Ahlberg, Lars (1986). "Gun Data for the Swedish Sverige Class Coastal Battleships". F.P.D.S. Newsletter. XIV (3): 1.
• Campbell, John (1985). Naval Weapons of World War II. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-459-4.
• Harris, Daniel G. (1992). "The Svierge Class Coastal Defense Ships". In Gardiner, Robert (ed.). Warship 1992. London: Naval Institute Press. pp. 80–98. ISBN 0-85177-603-5.

Wikimedia Commons has media related to Bofors 28 cm Model 1912 gun.

• Tony DiGiulian, Sweden 28.3 cm/45 (11.1") Model 1912

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