Description

This weapon was used to arm almost all Torpedo Boats built between 1936 and 1945 as well as on many smaller vessels. Originally designed as a surface-only weapon, later mounts provided a higher maximum elevation for anti-aircraft defense. A wet-mount version was developed for U-Boats. Also exported to Spain during the 1940s.

Earlier guns were monobloc types with barrel, jacket and breech-end piece. Later guns had a lighter, two-piece loose-liner barrel.

Many of the older, World War I-era, 10.5 cm SK L/45 weapons were modified during the 1930s and 1940s to use the same ammunition as the SK C/32 and these guns then had similar performance.

Some of these guns were still in service in Norwegian coastal defense batteries as late as 2002. The Norweigian firm of Nammo Raufoss AS produced anti-ship rounds for these guns during the 1980s.

Gun Characteristics

Designation 10.5 cm/45 (4.1") SK C/32
Ship Class Used On
  • Germany
    • T1 and T22 Torpedo Boat classes (Type 35 and Type 37)
    • Also used on F-boats and some M261 (Type 40) minesweepers
    • Wet-mount used on Type I, Type IX and Type X U-Boats
    • Schlesien class replaced their four 8.8 cm/45 guns with six of these guns in 1944
    • Emden replaced her three 8.8 cm/45 guns with three of these guns in 1944
  • Spain
    • Almirante Cervera, Eolo class minesweepers and gunboat Canalejas
Date Of Design 1932
Date In Service 1934
Gun Weight 3,494 lbs. (1,585 kg)
Gun Length oa 186.6 in (4.740 m)
Bore Length 173.2 in (4.400 m)
Rifling Length 145.43 in (3.694 m)
Grooves (32) 0.049 in deep x 0.268 in (1.25 mm x 6.8 mm)
Lands 0.138 in (3.5 mm)
Twist Increasing RH 1 in 45 to 1 in 30
Chamber Volume 328 in3 (5.380 dm3)
Rate Of Fire 15 rounds per minute

Ammunition

Type Fixed
Complete Round Weight
  • Germany
    • AP: N/A
    • HE: 53.35 lbs. (24.2 kg)
  • Norway
    • ASP M85: 53.8 lbs. (24.42 kg) 1
Projectiles and Weight
  • Germany
    • AP: N/A
    • HE: 33.3 lbs. (15.1 kg)
  • Norway
    • ASP M85: 33.3 lbs. (15.1 kg)
Bursting Charge
  • Germany
    • AP: N/A
    • HE: about 3.6 lbs. (1.63 kg)
  • Norway
    • ASP M85: 3.6 lbs. (1.63 kg) Composition A-3 plus 2.1 - 2.5 oz (60 - 70 gm) zirconium 1
Projectile Length
  • Germany
    • 18.1 in (45.9 cm)
    • Complete round was 41.4 in (105.2 cm)
  • Norway
    • 18.2 in (46.0 cm)
    • Complete round was 41.4 in (105.4 cm)
Propellant Charge Germany: 9.0 lbs. (4.08 kg) RPC/40N (4.4/1.7)
Norway: 9.1 lbs. (4.15 kg)
Cartridge Case Size and Empty Weight 105 x 459 mm, 10.1 lbs. (4.6 kg)
Muzzle Velocity Germany: 2,560 fps (780 mps)
Norway: 2,575 fps (785 mps)
Working Pressure 18.0 tons/in2 (2,850 kg/cm2)
Approximate Barrel Life 4,100 rounds
Ammunition stowage per gun T1, T22 and M261: 120 rounds 2
Type I U-boat: 120 rounds
Type IX U-boat: 110 rounds
  • ^1.11.2Nammo-Raufoss AS produced an anti-ship projectile (ASP M85) for the Norwegian Coastal Defense batteries between 1986 and 1988. This projectile had the same interior and external ballistics as the earlier German rounds. The zirconium in the burster was added to increase the incendiary effect.
  • ^Outfits for torpedo-boats, F-boats and minesweepers included HE incendiary and AP.

Range

Range with 33.3 lbs. (15.1 kg) HE
Elevation Range
44.4 degrees 16,600 yards (15,175 m)
AA Range @ 80 degrees 33,800 feet (10,300 m)
Range with 33.3 lbs. (15.1 kg) Norwegian
Elevation Range
45 degrees about 16,800 yards (15,350 m)

Mount/Turret Data

Designation 1a
  • Single mounts
    • Schlesien (6): MPL C/32ge
    • Torpedo Boats (1): MPL C/32 or MPL C/32ge
    • Type I and early Type IX U-Boats (1): Ubts LC/32
    • Later Type IX and Type X U-Boats (1) 2a: Ubts LC/36
    • Smaller boats: MPLC/30 (originally built for 8.8 cm guns)
    • Emden as rearmed in 1944 (3): MPL C/32ge
Weight MPL C/32: 14,297 lbs. (6,485 kg)
MPL C/32ge: 14,771 lbs. (6,750 kg)
Ubts LC/32: 10,957 lbs. (4,970 kg)
Ubts LC/36: 10,141 lbs. (4,600 kg)
MPLC/30: 15,234 lbs. (6,910 kg)
Elevation MPL C/32: -10 / +50 degrees
MPL C/32ge: -10 / +70 degrees
Ubts LC/32: -10 / +35 degrees
Ubts LC/36: -10 / +30 degrees
MPLC/30: -9 / +80 degrees
Elevation Rate Hand operated, only
Train 360 degrees
Train Rate Hand operated, only
Gun recoil N/A
  • ^I lack information on the mountings used on Spanish warships. Almirante Cervera carried four of these guns after being refitted during World War II.
  • ^Most Type IX and Type X U-boats had these guns removed after 1942 in order to mount additional light AA guns. Guns were then reused on Type 40 minesweepers.

Additional Pictures

Sources

Data from:

  • "German Navy at War 1935-1945: The U Boat" by Siegfried Breyer and Gerhard Koop
  • "Naval Weapons of World War Two" by John Campbell
  • "Jane's Ammunition Handbook: Ninth Edition 2000-2001" edited by Terry J. Gander and Charles Q. Cutshaw
  • "German Warships 1815-1945" by Erich Gröner
  • "German Destroyers of World War Two" (2nd Edition) and "German Capital Ships of World War Two" both by M.J. Whitley

Special help from Jamal Hannah

Page History

09 April 2008
Benchmark
20 May 2012
Updated to latest template
22 February 2014
Adjusted burster weights and added information and photograph about Norwegian ammunition