Britain
M3 Grant Command Tank (Grant)

Tweet The M3 Grant Command Tank based on the existing fully tracked Medium Tank and was in use from 1940. It was armed with 3 light machine guns. Its main armament consisted of a 75mm Gun M3 L/40 which could penetrate 110 mm of flat plate at 100 metres The Medium tank M3 Grant was was an American M3 Lee tank modified by replacing the original turret by a lower profile one with a large overhang at the rear to take radios. General Details Specifications Operational Date(s) 1940 Quantity Produced 0 Weight unknown Crew 6 M.G's small 3 M.G's large(>10mm) n/a Length 5.69 mtr Width 2.74 mtr Height 3.15 mtr Engine Details/Performance Max Road Speed 21 mph Max Cross Country Speed 16 mph Range Road 120 miles Range Cross Country 48 miles Fuel Type Petrol Fuel Capacity 175 gal Horse Power 340 hp Power/Weight unknown General Information The M3 Grant Command Tank based on the existing fully tracked Medium Tank and was in use from 1940. It was armed with 3 light machine guns. Its main armament consisted of a 75mm Gun M3 L/40 which could penetrate 110 mm of flat plate at 100 metres The Medium tank M3 Grant was was an American M3 Lee tank modified by replacing the original turret by a lower profile one with a large overhang at the rear to take radios. The engine, a Wright-Continental 340hp petrol engine drove the front drive gear, this then went underneath three bogies each containing two road wheels, the track continued to the rear idler then back via 3 return rollers on the top of the bogies. The armament consisted of a hull mounted 75mm gun with dummy barrel in the turret and additional radio gear. Armour Details Turret Front 51mm @ 47° (75mm) Side 51mm @ 5° (51mm) Rear 51mm @ 5° (51mm) Top 22mm @ 90° (22mm) Superstructure Front 51mm @ 45° (72mm) Side 38mm @ 0° (38mm) Rear 38mm @ 0° (38mm) Top 13mm @ 87° (13mm) Hull Front 45mm @ 45° (64mm) Side 38mm @ 0° (38mm) Rear 38mm @ 0° (38mm) Top 13mm @ 87° (13mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 75 mm - Minimum 13 mm Weapon Details 75mm Gun M3 L/40 Calibre 75mm Length L/40   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content AP (AP Armor Piercing) 75mm 6.32Kg 619M/Sec Quoted Penetration 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@30°) 95 88 79 70 61 52 45 38 Penetration(mm@0°) 110 102 92 81 71 61 52 44 Hit Probability(%) 98 98 98 88 54 25 15 3 HE M48 (HE High Explosive) 75mm 6.76Kg 625M/Sec 0.680Kg explosive Maximum Range 5000 Mtr Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.85 4.36 8 13.72 24.01 48.06 168.4 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.68 1.43 2.29 3.25 4.36 5.65 Hit Probability(%) 98 98 98 88 57 25 15 3 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 3 mtr Burst radius Infantry in open 66% kill 6 mtr Burst radius Infantry in open 33% kill 16 mtr  Armour Penetration inc roof at 1 mtr 2 mm An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 16 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 2 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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