Medium M4A1 General Details Specifications Manufacture Date(s) 1942 Quantity Produced 6281 Weight unknown Crew 5 M.G's small 3 M.G's large(>10mm) 0 Length 5.88 mtr Width 2.63 mtr Height 2.77 mtr Engine Details/Performance Max Road Speed 24 mph Max Cross Country Speed 17 mph Range Road 120 miles Range Cross Country 0 miles Fuel Type Petrol Fuel Capacity 175 gal Horse Power 400 hp Power/Weight unknown General Information The Sherman II M4A1 was a similar shape to the M4 but had a curved cast hull which provided less flat surfaces for AT hits, this was mostly noticable at the top of the hull next to the turret. The cast turret carrying the gyro stabilised 75mm Gun M3 was the same as that of the Sherman I. It was driven by a Continental 350HP air cooled engine with the drive sprocket at the front, the track went under 3 double bogie wheels onto the idler, then back over 3 return rollers. Armour Details Turret Front 75mm@0°(75mm) Side 50mm@0°(50mm) Rear 50mm@0°(50mm) Top 25mm@90°(25 mm) Superstructure Front 50mm@45°(71mm) Side 50mm@0°(50mm) Rear 38mm@0°(38mm) Top 19mm@90°(19 mm) Hull Front 40mm@45°(57mm) Side 40mm@0°(40mm) Rear 38mm@0°(38mm) Top 19mm@90°(19 mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 75 mm - Minimum 19 mm Weapon Details 75mm Gun M3 L/40 Calibre 75mm Length L/40   Ammunition Details Name/Id Calibre Weight MVelocity Quoted Penetration   AP(AP) 75mm 6.32Kg   619M/Sec 70mm@500m Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.68 1.45 2.31 3.29 4.41 5.7 Penetration(mm) 76 75 73 69 65 60 56 52 Hit Probability(%) 98 98 98 88 54 25 15 3

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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