Britain
Vickers Mk IIA.C.S

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The Vickers Mk IIA.C.S based on the existing Medium Tank and was in use from 1932.

General Details Specifications Operational Date(s) 1932 Ordnance classification Quantity Produced 0 Weight unknown Crew 5 M.G's small 3 M.G's large(>10mm) n/a Length 5.38 mtr Width 2.80 mtr Height 3.08 mtr Engine Details/Performance Max Road Speed 15 mph Max Cross Country Speed unknown Range Road 0 miles Range Cross Country unknown Fuel Type Unknown Fuel Capacity unknown Horse Power 90 hp Power/Weight unknown General Information The Vickers Mk IIA.C.S based on the existing Medium Tank and was in use from 1932. It was armed with 3 light machine guns. Its main armament consisted of an Ordnance Q.F. 37mm Mk 1 which could penetrate 34 mm of flat plate at 800 metres The Vickers Mk IIA Close Support was an improved version of the Vickers Mk II with minor improvements. The Armstrong-Siddley 90hp engine drove the rear drive sprocket over 4 return rollers to the fron idler than back to the rear via 11 small road wheels. The turret was rounded with flat sides and contained the 3.7 inch howitzer and 4 hotchkiss machine guns. The two Vickers .303 machine guns were located in ball mounts on the side of the vehicle. Armour Details Turret Front n/a Side n/a Rear n/a Top n/a Superstructure Front n/a Side n/a Rear n/a Top n/a Hull Front n/a Side n/a Rear n/a Top n/a Armour (x)mm @ (y)° (Effective mm @ 0°)

Weapon Details Ordnance Q.F. 37mm Mk 1 (Anti Aircraft) History Used both as an Anti Tank gun and as a Tank gun the 2pdr was first used by the Belgians in 1939 and the majority of the British guns were captured by the Germans at Dunkirk and given their designation of 4.0 cm Pak 192(e) or 4.0 cm Pak 154(b). Manufactured 1936 - 1944 Calibre 37mm Length L/52 Rate of Fire 22 rpm   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content 37 mm sk ptr m/34 slpprj m/38 (AP Armor Piercing) 37mm 0.74Kg 785M/Sec Quoted Penetration 40mm @ 400mtr/30° ( ≈ 46mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.57 1.3 2.27 3.6 5.55 8.73 Penetration(mm@30°) 46 41 36 29 22 17 12 7 Penetration(mm@0°) 54 48 42 34 26 20 14 9 Hit Probability(%) 98 98 98 93 57 22 3 1 37 mm sk ptr m/34 sgr m/43 (HE High Explosive) 37mm 0.68Kg 805M/Sec 0.210Kg explosive Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.7 5.42 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.26 0.56 1.27 2.21 3.51 5.42 8.5 Hit Probability(%) 98 98 98 93 57 22 6 2 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 4 mtr Burst radius Infantry in open 66% kill 8 mtr Burst radius Infantry in open 33% kill 20 mtr  Armour Penetration inc roof at 1 mtr 0 mm An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 8 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 20 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. 37 mm sk ptr m/34 slpgr m/39 (HEAT High Explosive Anti-Tank) 37mm 0.74Kg 775M/Sec Quoted Penetration 39mm @ 100mtr/30° ( ≈ 45mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.58 1.32 2.29 3.64 Penetration(mm@30°) 39 Penetration(mm@0°) 39 Hit Probability(%) 98 98 98 90 57 22

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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