Bofors 283 mm gun

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28 cm kanon M/12
HMS Gustav V.jpg
Aft 283 mm dual turret on Coastal defence ship Gustav V
Type Naval gun
Place of origin Sweden
Service history
In service 1916-1957
Production history
Designer Bofors
Designed 1912
Manufacturer Bofors
Number built 12
Specifications
Weight Barrel 44 ton
Length cal 45

Shell 305 kg
Caliber 283 millimetres (11.1 in)
Elevation 5°/sec, max 20°
Traverse 4°/sec
Rate of fire 4/min
Muzzle velocity 860 m/sec
Maximum range as built 20 400 m
from 1939 24 000 m


The Bofors 283 mm gun was a naval gun used in the Swedish Sverige class coastal defence ships


Distance[m] 6 000 18 000
Side armor belt penetration[mm] 350 155
Deck armor penetration[mm] - 87