• Source: 3.7 cm Flak 43

The 3.7 cm Flak 43 was a light anti-aircraft (AA) gun used by Nazi Germany during World War II. It was derived from the 3.7-centimeter (1.5 in) Flak 18/36/37 series of AA guns. It was provided with single- and twin-gun mounts, the latter being designated as the 3.7 cm Flak 43 Zwilling and was in service from 1944 to 1945. In addition to versions used by the Kriegsmarine (German Navy), it served as the main armament of the Ostwind and Möbelwagen and was proposed for use in the Flakpanzer Coelian self-propelled AA guns.




Background and description


Rheinmetall-Borsig redesigned the Flak 36/37 to incorporate the gas-operated breech mechanism of the 3-centimeter (1.18 in) MK 103 and to reduce the number of man-hours required to manufacture it from 4320 to 1000. The most obvious change was the adoption of a horizontal feed system from the vertical system of the earlier guns. The feed tray was positioned inside the oversized trunnions at the gun's center of gravity so it could be reloaded without disturbing the gun's aim. These changes significantly lightened the gun and made it faster to traverse and elevate.




= Naval use

=

The Kriegsmarine used a version of it on surface ships as the 3.7 cm Flak M43 in its own single- and twin-gun mounts; its Flak LM 44 mount had the guns side-by-side, unlike the Zwilling.




Service


The first Flak 43s were reported in Luftwaffe service in August 1944, 431 single guns and 41 Zwilling mounts. By February 1945, these increased to 1032 single guns and 380 Zwillings.




References






Bibliography


Campbell, John (1985). Naval Weapons of World War II. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-459-4.
Chamberlain, Peter & Gander, Terry (1975). Anti-Aircraft Guns. World War 2 Fact Files. New York: Arco Publishing Co. ISBN 0-668-03818-7.
DiGiulian, Tony (2 December 2015). "Germany 3.7 cm/57 (1.5") Flak M43". NavWeaps. Retrieved 22 December 2019.
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. Garden City, New York: Doubleday. ISBN 0-385-15090-3.
Hogg, Ian V. (2013). German Artillery of World War Two. Barnsley, UK: Frontline Books. ISBN 978-1-84832-725-2.
Skwiot, Miroslaw (2011). German Naval Guns 1939–1945. Annapolis, Maryland: Naval Institute Press. ISBN 978-1-59114-311-6.
Williams, Tony G. (2000). Rapid Fire: The Development of Automatic Cannon, Heavy Machine Guns and Their Ammunition for Armies, Navies and Air Forces. Shrewsbury, UK: Airlife Publishing. ISBN 1-84037-122-6.




Further reading


Williams, Anthony G. (2022). Autocannon: A History of Automatic Cannon and Ammunition. Ramsbury, UK: The Crowood Press. ISBN 978-1-78500-920-4.




External links



3.7 cm Flak 43 in U.S. Ordnance Catalog Archived 2020-11-24 at the Wayback Machine

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