Britain Carrier Churchill 3 inch Gun Mk I (A22D) Ordnance classification - A22

Tweet The Carrier Churchill 3 inch Gun Mk I (A22D) was designed in 1941, manufactured by Vauxhall Motors based on the existing fully tracked Churchill III and was in use from 1942 to 1943. General Details Specifications Operational Date(s) 1942 - 1943 Ordnance classification A22 Quantity Produced 45 Weight 40 tonne Crew 4 M.G's small n/a M.G's large(>10mm) n/a Length 7.51 mtr Width 3.28 mtr Height 2.80 mtr Engine Details/Performance Max Road Speed 16 mph Max Cross Country Speed 8 mph Range Road 90 miles Range Cross Country 36 miles Fuel Type Petrol Fuel Capacity 190 gal Horse Power 350 hp Power/Weight 8 hp/tonne General Information The Carrier Churchill 3 inch Gun Mk I (A22D) was designed in 1941, manufactured by Vauxhall Motors based on the existing fully tracked Churchill III and was in use from 1942 to 1943. The vehicle was powered by Bedford '350HP' petrol powerplant producing 350 HP which could drive the vehicle on roads at up to 16 mph with a range of about 90 miles before refuelling. Its cross country performance was adequate providing a max speed of about 8 mph and a range of about 36 miles. Its main armament consisted of an Ordnance Q.F. 3inch 20cwt AA which could penetrate 103 mm of flat plate at 400 metres This version of the Churchill tank had the turret replaced by a box like superstructure which was 88mm thick and which held the obsolete QF 3 inch (76 mm) 20 cwt AA gun. This vehicle never saw action as other vehicles mounting the 17pdr with it superior anti tank capabilities became available. Armour Details Turret Front n/a Side n/a Rear n/a Top n/a Superstructure Front 88mm @ 0° (88mm) Side 95mm @ 0° (95mm) Rear 50mm @ 0° (50mm) Top 19mm @ 90° (19mm) Hull Front 50mm @ 70° (146mm) Side 95mm @ 0° (95mm) Rear 50mm @ 0° (50mm) Top 19mm @ 90° (19mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 146 mm - Minimum 19 mm Weapon Details Ordnance Q.F. 3inch 20cwt AA (Field Gun) Manufactured 1914 - 1944 Calibre 76.20mm Length L/45 Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content QF 3-inch 20 cwt (HE High Explosive) 76.20mm 7.26Kg 610M/Sec ≈1.089Kg explosive Maximum Range 6700 Mtr Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.89 4.45 8.11 13.81 23.85 46.29 141.17 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.17 0.34 0.69 1.47 2.34 3.32 4.45 5.74 Hit Probability(%) 98 98 98 88 54 25 15 3 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 3 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 penetrate 3 mm of the tank armour including the roof.

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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