The first post-World War I naval gun developed by Germany. A good weapon for its size but considered to be somewhat heavy for a hand-worked mount. Not widely used and ammunition for it was scarce during the last years of the war. Most of the Torpedo Boats had these guns replaced by the 10.5 cm/45 (4.1") SK C/32 in the 1930s, but Jaguar still carried them as late as 1944 and was often short of ammunition at that time.
Some of these guns were bored out and became the early models of the 12.7 cm/45 (5") SK C/34.
| Designation | 10.5 cm/55 (4.1") SK C/28 |
|---|---|
| Ship Class Used On | Torpedo Boat Type 23 (Wolf) class and Training Ship Bremse |
| Date Of Design | 1928 |
| Date In Service | 1930 |
| Gun Weight | 8,070 lbs. (3,660 kg) |
| Gun Length oa | 226.8 in (5.760 m) |
| Bore Length | 213.8 in (5.431 m) |
| Rifling Length | N/A |
| Grooves | N/A |
| Lands | N/A |
| Twist | N/A |
| Chamber Volume | 513 in3 (8.4 dm3) |
| Rate Of Fire | 15 rounds per minute |
| Type | Fixed | |
|---|---|---|
| Complete Round Weight | N/A [probably around 53 lbs. (24 kg)] | |
| Projectile Types and Weights 1 | HE L/4,1 - 32.4 lbs. (14.7 kg)
HE incendiary L/4,1: 32.4 lbs. (14.7 kg) HE U-boat L/10: 32.4 lbs. (14.7 kg) 2 Illumination L/4,2: 32.2 lbs. (14.6 kg) |
|
| Bursting Charge 3 | HE L/4,1 | G: 2.33 lbs. (1.055 kg)
S: 2.09 lbs. (0.950 kg) TNT |
| HE incendiary L/4,1 | G: 2.33 lbs. (1.055 kg)
S: 1.10 lbs. (0.500 kg) TNT + 2.54 lbs. (1.150 kg) Incendiary (Brandkörper B) |
|
| HE U-boat L/10 | G: N/A
S: 12.79 lbs. (5,800 kg) TNT |
|
| Projectile Length | L/4,1: 18.1 in (459 mm)
U-boat L/10: about 41.3 in (105.0 cm) |
|
| Propellant Charge | L/4.1: 11.8 lbs. (5.37 kg) RPC/32 (6.5/3.5)
HE U-boat L/10: N/A Illum L/4,1: N/A |
|
| Muzzle Velocity | 3,035 fps (925 mps)
HE U-boat L/10: N/A Illum L/4,1: 2,130 fps (650 mps) |
|
| Working Pressure | N/A | |
| Approximate Barrel Life | N/A | |
| Ammunition stowage per gun | Torpedo Boats: 100 rounds
Bremse: N/A |
|
- ^
Actual German designations HE L/4,1 10.5 cm Spgr Patr 28 L/4,1 HE incendiary L/4,1/th> 10.5 cm Spgr Patr 28 L/4,1 Br HE U-boat 10,5 cm U-Spgr Patr 28 L/10 Illumination L/4,2 10,5 cm Lg Patr 28 L/4,2 - ^This was a special, oversized ASW round. It is not known if this actually entered service.
- ^Burster weights (G = Gesamtgewicht and S = reiner Sprengstoff) from M.Dv. Nr. 198.
| Elevation | Distance |
|---|---|
| 30 degrees | 18,860 yards (17,250 m) |
| Designation | Single Mounts
Bremse (4) and Wolf (3) 1a: MPL C/28 |
|---|---|
| Weight | N/A |
| Elevation | -10 / +30 degrees |
| Elevation Rate | Hand operated, only |
| Train | 360 degrees |
| Train Rate | Hand operated, only |
| Gun recoil | N/A |
- ^These guns were removed from Leopard, Luchs and Bremse and replaced with 12.7 cm/45 (5") SK C/34. All other Torpedo Boats except Jaguar had them replaced by the 10.5 cm/45 (4.1") SK C/32.
"Naval Weapons of World War Two" by John Campbell
"German Warships 1815-1945" by Erich Gröner
"Die Geschichte der deutschen Schiffsartillerie" by Paul Schmalenbach
"German Naval Guns: 1939 - 1945" by Miroslaw Skwiot
"German Warships of World War II" by J.C. Taylor
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"Übersicht über die für die Marinegeschütze und deren Abk K zu verwendende Munition und ihre Einzelteile einschließlich Salut-
und Manöverladungen" M.Dv. Nr. 198 by Oberkommando der Kriegsmarine
"Hauptsächliche Angaben über an Bord Befindliche Geschütze für das Handbuch für Admiralstabsoffiziere" dated 1/1/1939 by Oberkommando der Kriegsmarine
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Special help from Bene Adler
10 May 2006 - Benchmark
04 June 2011 - Minor updates
28 January 2019 - Converted to HTML 5 format
17 August 2024 - Added burster weight
20 June 2025 - Redid Burster table
05 November 2025 - Corrected typographical errors