3 7 flak 43

3.7 cm Flak 18/36/37/43
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3.7 cm Flak 18/36/37/43
Bundesarchiv Bild 101I-301-1957-32, Nordfrankreich, Zwillings-Flak.jpg
A 3.7 cm Flakzwilling 43
Type Anti-aircraft cannon
Place of origin Nazi Germany
Service history
In service 1936–45
Used by Nazi Germany, Romania, Bulgaria
Wars World War II
Production history
Designer Rheinmetall
Produced 1936–45
Number built 20,243[1]
Variants BK 37 aircraft gun,
3.7 cm Flakzwilling 43
Specifications (3.7 cm Flak 43[1][why?])
Weight 2,000 kg (4,400 lb) (transport)
Crew 6–7
Shell 37 × 263 mm. B[citation needed]
Shell weight 623–659 grams (1.373–1.453 lb)
Caliber 37 millimetres (1.5 in)
Barrels 57 calibers
Breech gas-operated bolt
Carriage three-legged platform
Elevation -7° 30' to +90°[citation needed]
Traverse 360°
Rate of fire 150 rpm (practical), 250 rpm (theoretical)
Muzzle velocity 770–820 m/s (2,500–2,700 ft/s)
Effective firing range 4,800 m (15,700 ft) (anti-aircraft)
Maximum firing range 6,500 m (7,100 yd) (ground range)
Feed system 8-round clips
The 3.7 cm Flak 18/36/37/43 was a series of anti-aircraft cannon produced by Nazi Germany that saw widespread service in the Second World War. The cannon was fully automatic and effective against aircraft flying at altitudes up to 4,200 m.[2] The cannon was produced in both towed and self-propelled versions. Having a flexible doctrine, the Germans used their anti-aircraft pieces in ground support roles as well; 37 mm caliber guns were no exception to that. With Germany's defeat, production ceased and, overall, 37 mm caliber anti-aircraft cannon fell into gradual disuse, being replaced by the Bofors 40 mm gun and later, by 35-mm anti-aircraft pieces produced in Switzerland.

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