Cruiser Mk VI (Crusader II A.A.) General Details Specifications Manufacture Date(s) 1943 Quantity Produced 0 Weight unknown Crew 5 M.G's small 0 M.G's large(>10mm) 0 Length 6.05 mtr Width 2.66 mtr Height 2.26 mtr Engine Details/Performance Max Road Speed 28 mph Max Cross Country Speed 20 mph Range Road 124 miles Range Cross Country 91 miles Fuel Type Unknown Fuel Capacity 120 gal Horse Power 340 hp Power/Weight unknown General Information The Crusader tank was a redesigned A13 Mk III as a heavy cruiser tank that could rapidly move and provide good A/T performance. The vehicle was designed to use the the Liberty 340hp engine driving the tracks, towards the main front idler over 5 evenly spaced large road wheels, round the idler and back under the roadwheels in the standard Christie style. The Crusader was quite fast although heavier than the A13 , the turret was a complex angular shape twin Oerlikon 20mm guns in a high angle mount. The auxiliary machine gun turret was removed in this version. Armour Details Turret Front 49mm@7°(49mm) Side 24mm@45°(34mm) Rear 30mm@32°(35mm) Top 12mm@90°(12 mm) Superstructure Front 30mm@38°(38mm) Side 14mm@0°(14mm) Rear 28mm@11°(29mm) Top 7mm@90°(7 mm) Hull Front 20mm@60°(40mm) Side 14mm@0°(14mm) Rear 28mm@11°(29mm) Top 7mm@90°(7 mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 49 mm - Minimum 7 mm Weapon Details Oerlikon 20mm L/70 History Maufactured in Switzerland the first British imports arrived in 1940, and subsequently manufactured under licence in Ruislip London later in 1940. Two versions were manufactured with different barrel lengths L/70 and L/85 which gave muzzle velocities of 820m/sec L70 and 1050m/sec L/85. The L/70 could deliver shells at 450rpm and the L/85 at 900-1000 rpm. Manufactured 1940 - Present Calibre 20mm Length L/70   Ammunition Details Name/Id Calibre Weight MVelocity Quoted Penetration   20x110RB L/70(AP) 20mm 0.12Kg   820M/Sec Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.27 0.62 1.63 3.69 10.11 Penetration(mm) 25 24 21 16 10 5 Hit Probability(%) 98 98 98 81 22 0

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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