Germany
Flakpanzer IV 3.7cm (Ostwind)

Tweet The Flakpanzer IV 3.7cm based on the existing PzKpfw IV and was in use from 1944 to 1945. General Details Specifications Operational Date(s) 1944 - 1945 Ordnance classification Quantity Produced 44 Weight unknown Crew 6 M.G's small 2 M.G's large(>10mm) n/a Length 5.95 mtr Width 2.97 mtr Height 3.00 mtr Engine Details/Performance Max Road Speed 24 mph Max Cross Country Speed 10 mph Range Road 125 miles Range Cross Country unknown Fuel Type Petrol Fuel Capacity unknown Horse Power 300 hp Power/Weight unknown General Information The Flakpanzer IV 3.7cm based on the existing PzKpfw IV and was in use from 1944 to 1945. It was armed with 2 light machine guns. Its main armament consisted of a 3.7cm Flak 43 which could penetrate 30 mm of flat plate at 800 metres Armour Details Turret Front 25mm @ 37° (31mm) Side 25mm @ 30° (29mm) Rear 25mm @ 30° (29mm) Top n/a Superstructure Front 80mm @ 10° (81mm) Side 30mm @ 0° (30mm) Rear 20mm @ 11° (20mm) Top 12mm @ 87° (12mm) Hull Front 80mm @ 12° (82mm) Side 30mm @ 0° (30mm) Rear 20mm @ 9° (20mm) Top 10mm @ 90° (10mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 82 mm - Minimum 10 mm Weapon Details 3.7cm Flak 43 3.7cm Flugabwehrkanone 43 (translates as Anti Aircraft Gun) Calibre 37mm   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content 3.7cm Pzgr Patr 18 (AP Armor Piercing) 37mm 0.68Kg 762M/Sec Quoted Penetration 31mm @ 500mtr/30° ( ≈ 35mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 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) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.68 5.31 19.44 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 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% 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.

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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