3.7 cm SK C/30











































































































3.7 cm SK C/30

Bundesarchiv Bild 101II-MN-0945-08, Schulboot "Drache", Doppelflak.jpg
3.7 cm SK C/30 on a Dopp L C/30 stabilized mount

Type Anti-aircraft cannon
Place of origin Nazi Germany
Service history
In service 1935–66
Used by Nazi Germany
Spain
Wars Second World War
Production history
Designer Rheinmetall
Designed 1930—35
Manufacturer Rheinmetall
Produced 1935—43
Variants 3.7 cm SK C/30U
Specifications
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 37 x 380Rmm
Action single-shot
Breech semi-automatic, vertical sliding-block
Elevation depends on the mount
Traverse 360°
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 It was superseded by the fully automatic 3.7 cm FlaK 43 late in the war.




Contents






  • 1 Description


    • 1.1 Mountings


    • 1.2 Ammunition


    • 1.3 Comparison of anti-aircraft guns




  • 2 Footnotes


  • 3 Citations


  • 4 References


  • 5 External links





Description


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 120 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.[1]


Ship classes that carried the 3.7 cm SK C/30 include:




  • Admiral Hipper-class cruisers

  • Bismarck-class battleships

  • Chamois-class minesweeping sloops

  • Deutschland-class battleships

  • Deutschland-class cruisers

  • Elbing-class torpedo boats

  • F-class escort ships

  • German Type IXA submarines

  • German Type XIV submarines

  • Graf Zeppelin-class aircraft carriers

  • Königsberg-class cruisers

  • Leipzig-class cruisers

  • M-class minesweepers

  • PA-class patrol ships

  • R boats

  • Sperrbrecher

  • Scharnhorst-class battleships

  • Type 1934A-class destroyers

  • Type 1936-class destroyers

  • Type 1936A-class destroyers

  • Type 1936B destroyers

  • Type 35 torpedo boats

  • Type 37 torpedo boats




Mountings




SK C/30U on a type IX U-Boat (U-103) in 1939


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-millimetre (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.[2]























Mounting
weight
elevation
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°


Ammunition


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).[3]



Comparison of anti-aircraft guns


































































Country
Gun Model
RPM
Projectile Weight
Weight of fire

 Nazi Germany
3.7 cm SK C/30
30
.74 kg (1.6 lb)[4]
22.2 kg (49 lb)

 France

Canon de 37 mm Modèle 1925
15-21
.72 kg (1.6 lb)[5]
10.8–15.12 kg (23.8–33.3 lb)

 Italy

Cannone-Mitragliera da 37/54 (Breda)
60-120
.82 kg (1.8 lb)[6]
49.2–98.4 kg (108–217 lb)

 United States

37 mm Gun M1
120
.87 kg (1.9 lb)
104.4 kg (230 lb)

 Nazi Germany

3.7 cm Flak 18/36/37/43
150
.64 kg (1.4 lb)[7]
96 kg (212 lb)

 Soviet Union

37 mm automatic air defense gun M1939 (61-K)
80[8]
.73 kg (1.6 lb)[9]
58.4 kg (129 lb)

 United Kingdom

QF 2-pounder naval gun
115
.91 kg (2.0 lb)[10]
104.6 kg (231 lb)

 Sweden

Bofors 40 mm gun
120
.9 kg (2.0 lb)[11]
108 kg (238 lb)


Footnotes





  1. ^ SK - Schnelladekanone (quick loading cannon); C - Construktionsjahr (year of design)




Citations





  1. ^ Campbell, p. 256


  2. ^ "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..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  3. ^ Hogg, p. 223


  4. ^ DiGiulian, Tony. "Germany 3.7 cm/83 SK C/30 - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  5. ^ DiGiulian, Tony. "France 37 mm/50 (1.46") Model 1925 and CAIL Model 1933 - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  6. ^ DiGiulian, Tony. "Italy 37 mm/54 (1.5") Models 1932, 1938 and 1939 - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  7. ^ DiGiulian, Tony. "Germany 3.7 cm/57 (1.5") Flak M43 - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  8. ^ Foss, Christopher (1977). Jane's pocket book of towed artillery. New York: Collier. p. 229. ISBN 0020806000. OCLC 911907988.


  9. ^ DiGiulian, Tony. "Russia / USSR 37 mm/67 (1.5") 70-K - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  10. ^ DiGiulian, Tony. "United Kingdom / Britain 2-pdr QF Mark VIII - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.


  11. ^ DiGiulian, Tony. "USA Bofors 40 mm/60 Model 1936 - NavWeaps". www.navweaps.com. Retrieved 2017-06-07.




References




  • 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.



External links






  • SK C/30 on navweaps.com








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