Showing the details of the shells used(where known)
Polsten 20mm (Anti Aircraft)
A Polish redevelopment of the Oerlikon 20mm AA cannon but with a much simpler manufacturing process and number of parts.
1944 - 1954
Rate of Fire
20mm 0.13Kg 831M/Sec
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.