Wehrmacht History 1935 to 1945


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3.7 cm BK


3.7 cm BK

Service Data

In Service: 1941 to 1945

Production Data

Manufacturer: Rheinmetall-Borsig
Number built:

Technical Data

Type: Bordkanone

Calibre: 37 mm
Length: 3.75 mm
Weight: 275 kg
Rate of fire: 160 rounds per minute
Muzzle velocity: 718 m/s
Effective range: m
3.7 cm Flak 18
3.7 cm Flak 36/37
3.7 cm Flak 43
3.7 cm Flakzwilling 43
3.7 cm BK

Other: Armaments


The 3.7 cm BK (Bordkanone 3.7 cm) was a anti-tank cannon designed and produced by Rheinmetall-Borsig in 1941. The 3.7 cm BK was also known as the 3.7 cm Flak 18 when used by anti-aircraft batteries, this weapon was recoil loading automatic weapon with a sliding barrel and central locking mechanism, which was installed under the wings of fuselage of the aircraft as a self-contained pod with a six round magazine, The 3.7 cm BK could either fire tungsten hardcore ammunition or high explosive shells,

The 3.7 cm BK was the weapon installed in Hans-Ulrich Rudel Stuka (dive bomber) and he completed over 2,530 combat missions destroying more than 2000 targets, 800 plus vehicles, 519 tanks, 150 artillery pieces, a destroyer, two cruisers, and a Soviet battleship called the Marat, Hans-Ulrich Rudel was one of the most highly decorated personnel within the Wehrmacht.

The 3.7 cm BK (Bordkanone 3.7 cm) anti-tank cannon was installed in the following Luftwaffe aircraft
Junkers Ju 87G


3.7 cm BK Ju 87G picture 2
3.7 cm BK Ju 87G picture 3
3.7 cm BK Ju 87G picture 4
3.7 cm BK Ju 87G picture 5
3.7 cm BK Ju 88P picture 6
3.7 cm BK Ju 88P picture 7

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The Warplanes of the Third Reich.
ISBN-10: 0385057822

Flying Guns World War II.
ISBN-10: 1840372273

German Aircraft Guns WW I WW II.
ISBN-10: 091196410X

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