Britain 37mm COW gun

Showing the details of the shells used(where known)   Tweet Weapon Details 37mm COW gun (Machine Gun) 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. Manufacturer Coventry Ordnance Works Manufactured 1918 - 1942 Calibre 37mm Length L/62 Rate of Fire 90rpm   37x190R HE (HE High Explosive) 37mm 0.65Kg 594M/Sec ≈0.098Kg explosive Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 2.31 7.34 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 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% kill 2 mtr Burst radius Infantry in open 66% kill 5 mtr Burst radius Infantry in open 33% kill 13 mtr  Armour Penetration inc roof at 1 mtr 0 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 Name Common 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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