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Britain
37mm COW gun

Showing the details of the shells used(where known)
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Weapon Details
37mm COW gun
(Machine Gun)
Blank
History
The Coventry Ordnance Works designed this gun as an anti aircraft weapon during World War I, however it didn't go into production until late 1918.

It fired clips containing 5 rounds of shells, and was during World War II mounted on the Armadillo, a beach landing defence vehicle.
ManufacturerCoventry Ordnance Works
Manufactured1918 - 1942
Calibre37mm
LengthL/62
Rate of Fire90rpm
 
37x190R HE
(HE High Explosive)
37mm 0.65Kg 594M/Sec ≈0.098Kg explosive
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 2.31 7.34
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.17 0.36 0.76 1.72 3 4.75 7.34 11.56
Hit Probability(%) 98 98 98 77 29 8 2 0
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill2 mtr Burst radius Infantry in open 66% kill5 mtr
Burst radius Infantry in open 33% kill13 mtr  Armour Penetration inc roof at 1 mtr0 mm
An explosion within 2 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 5 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 13 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will not cause any significant armour damage.

Vehicles in our database using this gun
Vehicle NameCommon Name
 Armadillo MkIII 
 

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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