3.7 cm SK C/30
|3.7 cm SK C/30|
3.7 cm SK C/30 on a Dopp L C/30 stabilized mount
|Place of origin||Nazi Germany|
|Used by||Nazi Germany
|Wars||Second World War|
|Variants||3.7 cm SK C/30U|
|Weight||243 kilograms (536 lb)|
|Length||3.074 metres (10 ft 1 in)|
|Barrel length||2.962 metres (9 ft 9 in) L/83|
|Shell||fixed, cased charge|
|Shell weight||0.68 kilograms (1 lb 8 oz)|
|Caliber||3.7 centimetres (1.5 in)|
|Breech||semi-automatic, vertical sliding block|
|Elevation||depends on the mount|
|Rate of fire||30 rpm (practical)|
|Muzzle velocity||1,000 m/s (3,300 ft/s)|
|Effective firing range||2,000 m (6,600 ft) (effective ceiling)|
|Maximum firing range||8,500 m (9,300 yd) at 37.5°|
The 3.7 cm SK C/30[Note 1] was the German Kriegsmarine's primary 3.7 cm (1.5 in) anti-aircraft gun during the Second World War. It was superseded by the fully automatic 3.7 cm FlaK 43 late in the war.
The C/30 was a single-shot anti-aircraft gun that was loaded one round at a time which dropped its effective rate of fire to a mere 30 rounds per minute, far inferior to the 80-100 rounds per minute of its contemporary, the Bofors 40 mm anti-aircraft gun. Its muzzle velocity was on the other hand far superior (about 25% higher), which greatly eased the aiming. The SK C/30U gun was modified for use by submarines. All mountings were suitable for use against both air and soft surface targets.
The Doppellafette C/30 (Dopp L C/30) was a twin mount with each gun in a separate cradle. It had a six-man crew on the mount itself plus additional ammunition handlers. The mounting was manually traversed and elevated and was gyro-stabilized up to a limit of 19.5° degrees to counteract the roll and pitch of the ship. Most German ships, fleet torpedo boat or larger, carried at least one Dopp L C/30 mounting. The Einheitslafette C/34 (Einh L C/34, universal mounting model 34) was a single gun mounted on a pedestal with a two-man crew. Some mounts were fitted with a 8 millimetres (0.31 in) gun shield. It was used on the smaller Kriegsmarine ships like the Schnellboot. A number were used on land to supplement the anti-aircraft defenses of ports. The Ubts L C/39 submarine mount used the SK C/30U gun. It was a simple pedestal mount with a two-man crew, one of whom trained the gun with the shoulder stirrup; the other used gears to elevate the gun.
|Dopp L C/30||3,670 kg (8,090 lb)||-9° to +85°|
|Einh L C/34||1,860–2,020 kg (4,100–4,450 lb)||-10° to +80°|
|Ubts L C/39||1,450 kg (3,200 lb)||-10° to +90°|
The SK C/30 used two types of tracer rounds. The 3.7 cm Br Sprgr Patr 40 L/4.1 Lh 37M was a high-explosive round with an incendiary filling while the 3.7 cm Sprgr Patr 40 L/4.1 Lh 37 lacked the incendiary fill, but was otherwise identical. Tracers were available in red, yellow or white and were marked on the shell by a painted band of the appropriate color. A complete round weighed 1.78 kilograms (3.9 lb).
- SK - Schnelladekanone (quick loading cannon); C - Construktionsjahr (year of design)
- Campbell, p. 256
- "German 3.7 cm/L83 (1.5") SK C/30 3.7 cm/L83 (1.5") SK C/30U". 23 March 2009. Retrieved 2009-06-11.
- Hogg, p. 223
- Campbell, John (2002). Naval Weapons of World War Two. London: Conway Maritime Press. ISBN 0-87021-459-4.
- Gander, Terry; Chamberlain, Peter (1979). 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. ISBN 0-385-15090-3.
- Hogg, Ian V. (1997). German Artillery of World War Two (2nd corrected ed.). Mechanicsville, PA: Stackpole Books. ISBN 1-85367-480-X.
- Stehr, Werner (1999). Leichte und mittlere Artillerie auf deutschen Kriegsschiffen [Light and Medium Artillery on German Warships] (in German). Wölfersheim-Berstadt: Podzun-Pallas-Verlag. pp. 8–11. ISBN 3790906646.
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