United States 3 inch Gun Motor Carriage M10A1

The M10A1 was based on a modified Sherman Hull with thinner armour and a more powerful gun, the power for the M10A1 was supplied by a 454HP Ford petrol engine. General Details Specifications Operational Date(s) 1943 Quantity Produced 1413 Weight unknown Crew 5 M.G's small n/a M.G's large(>10mm) 1 Length 6.03 mtr Width 3.08 mtr Height 2.49 mtr Engine Details/Performance Max Road Speed 30 mph Max Cross Country Speed 20 mph Range Road 200 miles Range Cross Country unknown Fuel Type Petrol Fuel Capacity 164 gal Horse Power 454 hp Power/Weight unknown General Information The M10A1 was based on a modified Sherman Hull with thinner armour and a more powerful gun, the power for the M10A1 was supplied by a 454HP Ford petrol engine. The turret was manually rotated, so was not as fast to rotate as other models. Armour Details Turret Front 60mm @ 45° (85mm) Side 25mm @ 45° (35mm) Rear 25mm @ 45° (35mm) Top n/a Superstructure Front 37mm @ 45° (52mm) Side 25mm @ 45° (35mm) Rear 30mm @ 0° (30mm) Top 20mm @ 90° (20mm) Hull Front 37mm @ 45° (52mm) Side 25mm @ 45° (35mm) Rear 30mm @ 0° (30mm) Top 20mm @ 90° (20mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 85 mm - Minimum 20 mm Weapon Details 0.5 inch Browning Machine Gun M2 (Machine Gun) Calibre 12.70mm Rate of Fire 480 rpm Number of Rounds  300     Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content MG(MG) 12.70mm 0.04Kg 884M/Sec Quoted Penetration 22mm@100m Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.28 Penetration(mm@30°) 7 5 Penetration(mm@0°) 9 6 Hit Probability(%) 98 98 Weapon Details 3 in Gun M7 L/53 Calibre 76.20mm Length L/53 Number of Rounds  54     Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content AP(AP) 76.20mm 7Kg 792M/Sec Quoted Penetration 84mm@2000m Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.26 0.53 1.13 1.8 2.56 3.42 4.42 Penetration(mm@30°) 132 122 112 98 86 74 64 53 Penetration(mm@0°) 153 142 130 114 100 86 74 62 Hit Probability(%) 98 98 98 96 77 44 25 15

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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