Britain Vickers Mk IIA

The Vickers Mk IIA was an improved version of the Vickers Mk II with minor improvements. General Details Specifications Operational Date(s) 1930 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 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 3pdr gun 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. 2pdr (Anti Tank Gun) History Used both as an Anti Tank gun and as a Tank gun the 2pdr was first used in Belgium in 1939. 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). However the 2pdr manufacture was continued but was slowly replaced by the 6pdr from 1942. Manufactured 1936 - 1944 Calibre 40mm Length L/50 Rate of Fire 22 rpm   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content AP(AP) 40mm 1.08Kg 792M/Sec Quoted Penetration 53mm@455m Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.56 1.26 2.17 3.37 5.06 7.58 Penetration(mm@30°) 64 58 51 41 33 25 19 13 Penetration(mm@0°) 74 67 59 48 39 30 22 16 Hit Probability(%) 98 98 98 93 60 25 6 2

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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