United States
Light Tank M2A4
Ordnance classification - M2A4

Tweet The Light Tank M2A4 based on the existing Light Tank and was in use from 1939. General Details Specifications Operational Date(s) 1939 Ordnance classification M2A4 Quantity Produced 375 Weight unknown Crew 4 M.G's small 4 M.G's large(>10mm) n/a Length 4.48 mtr Width 2.56 mtr Height 2.56 mtr Engine Details/Performance Max Road Speed 34 mph Max Cross Country Speed 25 mph Range Road 130 miles Range Cross Country unknown Fuel Type Petrol Fuel Capacity 54 gal Horse Power 250 hp Power/Weight unknown General Information The Light Tank M2A4 based on the existing Light Tank and was in use from 1939. It was armed with 4 light machine guns. Its main armament consisted of a 37mm Antitank Gun M6 which could penetrate 64 mm of flat plate at 200 metres Armour Details Turret Front 25mm @ 0° (25mm) Side 19mm @ 0° (19mm) Rear 19mm @ 0° (19mm) Top 10mm @ 90° (10mm) Superstructure Front 25mm @ 45° (35mm) Side 19mm @ 0° (19mm) Rear 19mm @ 0° (19mm) Top 9mm @ 90° (9mm) Hull Front 25mm @ 45° (35mm) Side 19mm @ 0° (19mm) Rear 19mm @ 0° (19mm) Top 9mm @ 90° (9mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 35 mm - Minimum 9 mm Weapon Details 37mm Antitank Gun M6 (Anti Tank Gun) History This was the Tank mounted version of the 37mm M3 Manufacturer Watervliet Arsenal Calibre 37mm   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content AP M74 Shot (AP Armor Piercing) 37mm 0.86Kg 885M/Sec Quoted Penetration 36mm @ 500mtr/0° Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.12 0.24 0.51 1.15 2.01 3.19 4.93 7.73 Penetration(mm@30°) 61 55 48 38 30 22 16 10 Penetration(mm@0°) 71 64 56 45 35 26 19 12 Hit Probability(%) 98 98 98 96 64 25 8 2 HE M63 Shell (HE High Explosive) 37mm 0.73Kg 792M/Sec 0.039Kg explosive Maximum Range not shown as gun elevation is limited Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.57 1.29 2.25 3.56 5.51 8.63 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.57 1.29 2.25 3.56 5.51 8.63 Hit Probability(%) 98 98 98 93 57 22 3 1 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 0 mtr Burst radius Infantry in open 66% kill 1 mtr Burst radius Infantry in open 33% kill 3 mtr  Armour Penetration inc roof at 1 mtr 0 mm An explosion within 1 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 3 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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