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
TypeAnti-aircraft cannon
Place of originNazi Germany
Service history
In service1935–1966
Used byNazi Germany
Spain
WarsSecond World War
Production history
DesignerRheinmetall
Designed1930–1935
ManufacturerRheinmetall
Produced1935–1943
Variants3.7 cm SK C/30U
Specifications
Mass243 kilograms (536 lb)
Length3.074 metres (10 ft 1 in)
Barrel length2.962 metres (9 ft 9 in) L/83

Shellfixed, cased charge
Shell weight0.68 kilograms (1 lb 8 oz)
Caliber37 x 380 mm R
Actionsingle-shot
Breechsemi-automatic, vertical sliding-block
Elevationdepends on the mount
Traverse360°
Rate of fire30 rpm (practical)
Muzzle velocity1,000 m/s (3,300 ft/s)
Effective firing range2,000 m (6,600 ft) (effective ceiling)
Maximum firing range8,500 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 It was superseded by the fully automatic 3.7 cm FlaK 43 late in the war.
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