Description

A Bofors design, this weapon was also used on Netherlands destroyers. Models 1924 and 1924B were little different, but Model 1924C was of loose barrel construction. Also built under license by Wilton-Fijenoord.

The Design 1047 battlecruisers would have used a similar design, but in twin mountings. This may have been planned to be a more modern Bofors gun, but these weapons were not available for service use prior to the end of World War II.

All guns fired the same ammunition, which was semi-fixed. Actual bore size was 12 cm (4.724").

After these destroyers were scrapped in the 1960s and 1970s, their guns were then used to arm thirteen fortifications in northern Sweden. The guns were then given new ammunition for use against ground targets. These fortifications have all now been demilitarized and some have been turned into museums.

Gun Characteristics

Designation 12 cm/50 (4.7") Bofors 1924, 1924B, 1924C and Mark 4
12 cm/50 (4.7") Wilton-Fijenoord Marks 5, 6 and 7
Ship Class Used On
  • Sweden
    • Ehrensköld, Klas Horn, Göteborg and Visby Classes
  • Netherlands
    • Van Ghent Class: Mark 4
    • Van Galen Class: Mark 5
    • Van Kinsbergen: Mark 6
    • Willem van der Zaan: Mark 7
    • Design 1047: N/A
Date Of Design 1924
Date In Service 1928
Gun Weight Model 1924C: 2.95 tons (3.00 mt)
Gun Length about 251.6 in (6.390 m)
Bore Length about 236.2 in (6.000 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 10 rounds per minute

Ammunition

Type Separate
Weight of Complete Round N/A
Projectile Types and Weights HE: 52.9 lbs. (24 kg)
Bursting Charge N/A
Projectile Length N/A
Propellant Charge 19.4 lbs. (8.8 kg)
Cartridge: 18.3 lbs. (8.3 kg) [empty]
Muzzle Velocity HE - 2,952 fps (900 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun N/A

Range

Range with 52.9 lbs. (24 kg) HE
Elevation Distance
30 degrees 21,300 yards (19,500 m)

I have difficulty in believing this figure, as it is quite long for such a low elevation and this muzzle velocity.

Mount/Turret Data

Designation
  • Destroyers and Sloops: Single Half shield Mounts
    • Sweden: Ehrenskold (3), Klas Horn (3), Göteborg (3) and Visby (3)
    • Netherlands: Van Ghent (4), Van Galen (4), Van Kinsbergen (4) and Willem van der Zaan (2)
  • Design 1047 (6): Twin mountings
Weight
  • Single Mountings
    • Mark 4: 9.84 tons (10 mt)
    • Others: 8.56 tons (8.7 mt)
  • Twin Mounting: N/A
Elevation
  • Single mountings
    • -5 / +30 to +35 degrees
    • Possibly -5 / +45 degrees in Van Kinsbergen
  • Twin Mountings:-5 / +70 degrees
Elevation Rate Single mounts: Manually operated, only
Twin mounts: N/A
Train about +120 / -120 degrees
Train Rate N/A
Gun recoil N/A

Additional Pictures

Sources

Data from:

  • "Naval Weapons of World War Two" by John Campbell
  • "Destroyers of World War Two" by M.J. Whitley

Page History

21 May 2006
Benchmark
18 May 2010
Added information on coastal fortifications, number of guns on ships
16 June 2012
Deleted picture of Kortenaer, added picture of Evertsen