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Germany
3.7cm Flak 43
3.7cm Flugabwehrkanone 43
(translates as Anti Aircraft Gun)

Showing the details of the shells used(where known)
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Weapon Details
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3.7cm Flak 43
3.7cm Flugabwehrkanone 43
(translates as Anti Aircraft Gun)
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photo of 3.7cm Flak 43 from 3.7cm Flak 43 from ww2technik.de
Calibre37mm
 
3.7cm Pzgr Patr 18
(AP Armor Piercing)
37mm 0.68Kg 762M/Sec
Quoted Penetration 31mm @ 500mtr/30° ( ≈ 35mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.28 0.59 1.34 2.33 3.7 5.71 8.97
Penetration(mm@30°) 41 38 32 25 20 15 11 6
Penetration(mm@0°) 48 44 38 30 24 18 13 8
Hit Probability(%) 98 98 98 90 54 22 3 1



3.7cm Sprgr Patr 18(AA)
(HE High Explosive)
37mm 0.64Kg 820M/Sec ≈0.095Kg explosive
Maximum Range 6000 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 1.68 5.31 19.44
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.26 0.55 1.25 2.17 3.44 5.31 8.37
Hit Probability(%) 98 98 98 93 60 25 6 2
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
 3.7cm Flak 43 auf Schwere Wermachtschlepper 
 Flakpanzer IV 3.7cmOstwind 
 

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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