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Showing the details of the shells used(where known)

37mm COW 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.

Manufactured1918 - 1942
Calibre37mm
LengthL/62
Rate of Fire90rpm
 
Name/Id Calibre Weight MVelocity Quoted Penetration
 
AP 37mm 0.65Kg 594M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.17 0.36 0.76 1.72 3 4.75 7.34 11.56
Penetration(mm@0°) 30 29 27 24 21 17 14 10
Hit Probability(%) 98 98 98 77 29 8 2 0

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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