15 cm SK C/25
|15 cm SK C/25|
15 cm SK C/25 in Drh LC/35 turret on Nürnberg
|Place of origin||23x15px Nazi Germany|
|Used by||23x15px Nazi Germany|
|Wars||Second World War|
|Weight||11,970 kilograms (26,390 lb)|
|Length||9.08 metres (29.8 ft)|
|Barrel length||8.57 metres (28.1 ft)|
|Shell||separate-loading, cased charge|
|Caliber||149.1 millimetres (5.87 in)|
|Breech||semi-automatic, vertical sliding block|
|Elevation||-10° to +40°|
|Rate of fire||8 rpm (maximum)|
|Muzzle velocity||960 metres per second (3,100 ft/s)|
|Maximum range||25,700 metres (28,100 yd)|
The 15 cm SK C/25 (SK - Schiffskanone (ship's gun), C - Construktionsjahr (year of design)) was a German medium-caliber naval gun used during the Second World War. It served as the primary armament for the K-class and Leipzig-class cruisers. Oddly, no weapons of this type surplus appear to have been used as coast-defense guns.
The Drh. LC/25 triple-gun mount was the only mount used for this gun in the Kriegsmarine. The mount weighed between 136.91–147.15 tonnes (134.75–144.83 long tons; 150.92–162.21 short tons), depending on its armor thickness; the Nürnberg's mounts had between 20–80 mm (0.79–3.15 in) of armor while the other ships had 20–30 mm (0.79–1.18 in). Maximum elevation was 40°, giving a range of 25,700 metres (28,100 yd), and maximum depression was -10°, while the electric motors had a maximum elevating speed of 8° per second. Each mount was designed for full 360° of traverse, but was limited to much less than that by the ship's superstructure. Speed in train was a maximum of 6-8° per second using electrically-powered hydraulic pumps. The maximum firing cycle was 7.5 seconds, or 8 rounds per minute, despite being hand-loaded and rammed. Ammunition was supplied by three hoists, one between the left and center guns and the other two between center and right guns at the rear of the mount.
The SK C/25 had a number of different shells available.
|Shell name||Weight||Filling Weight||Muzzle velocity|
|base-fused HE shell with ballistic cap (Sprenggranate L/4.5 m Bdz m. Hb)||45.5 kg (100 lb)||3.058 kg (6.74 lb)||960 m/s (3,100 ft/s)|
|nose-fused HE shell with ballistic cap (15 cm Spgr. L/4.4 Kz m. Hb)||45.5 kg (100 lb)||3.892 kg (8.58 lb)||960 m/s (3,100 ft/s)|
|base-fused armor-piercing shell with ballistic cap (Panzer-Sprenggranate) L/3.7 m Bdz. m Hb)||45.5 kg (100 lb)||.885 kg (1.95 lb)||960 m/s (3,100 ft/s)|
|illumination shell||41 kg (90 lb)||Unknown||650 m/s (2,100 ft/s)|
Coast defense use?
No trace has been found of any SK C/25 guns used as coast defense guns. It is not listed in the reference works of either Gander and Chamberlain or Hogg, unlike most every other naval gun used by the Kriegsmarine, nor is it listed in the summary table of all German coast defense guns in Rolf. This is unusual considering the early loss of two of the K class cruisers Königsberg and Karlsruhe would have ordinarily have released the spare barrels held for both those ships for other duties if one can judge from the World War I experience with the 21 cm SK "Peter Adalbert".
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- Campbell, John. Naval Weapons of World War Two. London: Conway Maritime Press, 2002 ISBN 0-87021-459-4
- Gander, Terry and Chamberlain, Peter. Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939-1945. New York: Doubleday, 1979 ISBN 0-385-15090-3
- Hogg, Ian V. German Artillery of World War Two. 2nd corrected edition. Mechanicsville, PA: Stackpole Books, 1997 ISBN 1-85367-480-X
- Rolf, Rudi. Der Atlantikwall: Bauten der deutschen Küstenbefestigungen 1940-1945. Osnabrück: Biblio, 1998 ISBN 3-7648-2469-7
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