The M3 Grant Command Tank, it was based on the fully tracked Medium Tank chassis and was in use from 1940. It was commonly called a Grant. It was armed with 3 light machine guns. Its main armament consisted of a 75mm Gun M3 L/40 which could penetrate 90 mm of flat plate at 400 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 (Medium Tank) 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, it was based on the fully tracked Medium Tank chassis and was in use from 1940. It was commonly called a Grant. It was armed with 3 light machine guns. Its main armament consisted of a 75mm Gun M3 L/40 which could penetrate 90 mm of flat plate at 400 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 1.43 2.24 3.11 4.05 5.04 Penetration(mm@30°) 87 83 77 67 57 50 43 37 Penetration(mm@0°) 101 97 90 78 67 58 50 43 Hit Probability(%) 93 93 90 77 52 23 8 3 HE M48 (HE High Explosive) 75mm 6.76Kg 625M/Sec 0.680Kg explosive Maximum Range 5000 Mtr Range(Mtr) 500 1000 1500 2000 2500 3000 3500 4000 Flight Time(Secs) 0.84 1.76 2.76 3.83 4.98 6.2 7.48 8.83 lateral dispersion means the side to side variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.13 0.27 0.40 0.53 0.67 0.80 0.93 1.07 80% of shells land within +/- (mtr) 0.17 0.35 0.51 0.68 0.86 1.02 1.19 1.37 95% of shells land within +/- (mtr) 0.25 0.53 0.78 1.04 1.31 1.57 1.82 2.10 range dispersion means the back to front variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.17 0.33 0.50 0.67 0.83 1.00 1.17 1.33 80% of shells land within +/- (mtr) 0.22 0.42 0.64 0.86 1.06 1.28 1.50 1.70 95% of shells land within +/- (mtr) 0.33 0.65 0.98 1.31 1.63 1.96 2.29 2.61 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.67 1.42 2.22 3.1 4.03 Hit Probability(%) 93 93 90 77 52 23 8 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. About Penetration Figures All penetration figures in this database are calculated to a common standard based on German WWII testing criteria (complete penetration with functioning fuze). This allows direct comparison between all nations' guns. Original national test figures would be higher for some nations due to different criteria: German: 1.00? (baseline - strictest) British: 1.02? (slightly looser) American: 1.05? (50% mass through plate) Soviet: 1.10? (75% mass through plate) For example, a Soviet gun showing 159mm here would be published as ~175mm in Soviet documents, and a German gun showing 120mm would be published as 120mm in German documents. The 159mm figure is directly comparable to the German 120mm - the Soviet gun really was more powerful. National Testing Standards German: 1.00? - Complete penetration, fuze functions (strictest) British: 1.02? - Complete penetration American: 1.05? - 50% of shell mass through plate Soviet: 1.10? - 75% of shell mass through plate All database figures are normalized to German standard for direct comparison. Multiply by the factor above to see original national test figures.

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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