The 7.62cm Pak 36(r) Gw II(A,B,C,F) was a Self Propelled Anti Tank vehicle designed in 1941, manufactured by Alkett and Wegmann, it was based on the fully tracked PzKpfw II chassis and was in use from 1942 to 1945. It was commonly called a Marder II.

General Details (SP Anti Tank) Specifications Operational Date(s) 1942 - 1945 Ordnance classification SdKfz 131 Quantity Produced 150 Weight 10.8 tonne Crew 4 M.G's small 1 M.G's large(>10mm) n/a Length 4.81 mtr Width 2.22 mtr Height 1.99 mtr Engine Details/Performance Max Road Speed 25 mph Max Cross Country Speed 12 mph Range Road 125 miles Range Cross Country 50 miles Fuel Type Petrol Fuel Capacity unknown Horse Power 140 hp Power/Weight 12 hp/tonne General Information The 7.62cm Pak 36(r) Gw II(A,B,C,F) was a Self Propelled Anti Tank vehicle designed in 1941, manufactured by Alkett and Wegmann, it was based on the fully tracked PzKpfw II chassis and was in use from 1942 to 1945. It was commonly called a Marder II. The vehicle was powered by Maybach 'HL62TRM' petrol powerplant producing 140 HP which could drive the vehicle on roads at up to 25 mph with a range of about 125 miles before refuelling. Its cross country performance was good providing a max speed of about 12 mph and a range of about 50 miles. It was armed with 1 light machine gun. Its main armament consisted of a 7.62cm Pak 36(r) L/51 weighing 6.030 kg and with a maximum range of 9,000 metres. Armour Details Turret Front n/a Side n/a Rear n/a Top n/a Superstructure Front 30mm @ 10° (30mm) Side 10mm @ 8° (10mm) Rear 10mm @ 0° (10mm) Top 10mm @ 90° (10mm) Hull Front 35mm @ 13° (36mm) Side 15mm @ 0° (15mm) Rear 15mm @ 7° (15mm) Top 5mm @ 90° (5mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 36 mm - Minimum 5 mm Weapon Details 7.62cm Pak 36(r) L/51 7.62cm Panzerabwehrkanone 36(r) L/51 (translates as Anti Tank Gun) History This was the Soviet 7.62 1936 model many of which were captured in the early weeks of the Russian campaign and bored out to take the 7.5cm Pak 40 cartridge together with an added muzzle break. Manufactured 1942 - unknown Calibre 76.20mm Length L/51 Rate of Fire 12 rpm Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content 7.62cm Pzgr Patr 39 (AP Armor Piercing) 76.20mm 7.54Kg 740M/Sec Quoted Penetration 98mm @ 500mtr/30° ( ? 113mm/0?) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.14 0.28 0.56 1.17 1.83 2.53 3.27 4.05 Penetration(mm@30°) 98 95 89 79 70 62 54 48 Penetration(mm@0°) 113 110 103 92 81 72 64 56 Hit Probability(%) 93 93 90 83 64 35 23 8 7.62cm Sprgr Patr 39 (AP40 Armour Piercing Tungsten Cored) 76.20mm 4.07Kg 990M/Sec Quoted Penetration 118mm @ 500mtr/30° ( ? 136mm/0?) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.1 0.21 0.42 0.86 1.33 1.82 2.34 2.88 Penetration(mm@30°) 129 126 120 110 100 91 84 76 Penetration(mm@0°) 149 146 140 127 116 106 97 89 Hit Probability(%) 93 93 93 87 77 64 52 35 7.62cm Sprgr Patr 39 (HE High Explosive) 76.20mm 6.03Kg 450M/Sec 0.550Kg explosive Maximum Range 9000 Mtr Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 2.44 5.31 8.58 12.22 16.18 20.4 24.85 29.46 lateral dispersion means the side to side variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.27 0.53 0.80 1.07 1.33 1.60 1.87 2.13 80% of shells land within +/- (mtr) 0.35 0.68 1.02 1.37 1.70 2.05 2.39 2.73 95% of shells land within +/- (mtr) 0.53 1.04 1.57 2.10 2.61 3.14 3.67 4.17 range dispersion means the back to front variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.33 0.67 1.00 1.33 1.67 2.00 2.33 2.67 80% of shells land within +/- (mtr) 0.42 0.86 1.28 1.70 2.14 2.56 2.98 3.42 95% of shells land within +/- (mtr) 0.65 1.31 1.96 2.61 3.27 3.92 4.57 5.23 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.23 0.46 0.94 1.96 3.08 4.29 Hit Probability(%) 93 93 87 64 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 15 mtr  Armour Penetration inc roof at 1 mtr 1 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 15 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 1 mm of the tank armour including the roof. Weapon Details 7.5cm Pak 40 L/46 7.5cm Panzerabwehrkanone 40 L/46 (translates as Anti Tank Gun) History This was an enlarged 5cm Pak 38 so looks very similar, but with improved performance especially against the Russian T34 Manufacturer Rheinmetal-Borsig Manufactured 1941 - 1945 Calibre 75mm Length L/46 Rate of Fire 14 rpm Number of Rounds  30 Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content 7.5cm Pzgr 39 L/48 (AP Armor Piercing) 75mm 6.8Kg 792M/Sec Quoted Penetration 96mm @ 500mtr/30° ( ? 110mm/0?) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.26 0.53 1.09 1.7 2.34 3.03 3.75 Penetration(mm@30°) 129 125 118 105 94 83 74 66 Penetration(mm@0°) 149 145 137 122 109 97 86 77 Hit Probability(%) 93 93 90 83 64 52 23 14 7.5cm Pzgr 40 (AP40 Armour Piercing Tungsten Cored) 75mm 4.1Kg 920M/Sec Quoted Penetration 115mm @ 500mtr/30° ( ? 132mm/0?) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.11 0.22 0.45 0.93 1.44 1.98 2.55 3.15 Penetration(mm@30°) 145 142 135 122 111 100 91 82 Penetration(mm@0°) 169 164 156 142 128 116 105 95 Hit Probability(%) 93 93 93 87 77 64 35 23 7.5cm Sprgr 34 (HE High Explosive) 75mm 5.8Kg 548M/Sec 0.640Kg explosive Maximum Range not shown as gun elevation is limited Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.18 0.37 0.76 1.58 2.45 3.38 4.37 5.41 lateral dispersion means the side to side variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.12 0.12 0.12 0.21 0.32 0.43 0.53 0.64 80% of shells land within +/- (mtr) 0.15 0.15 0.15 0.27 0.41 0.55 0.68 0.82 95% of shells land within +/- (mtr) 0.24 0.24 0.24 0.41 0.63 0.84 1.04 1.25 range dispersion means the back to front variation of the shell from the aiming point 50%(CEP) of shells land within +/- (mtr) 0.15 0.15 0.15 0.27 0.40 0.53 0.67 0.80 80% of shells land within +/- (mtr) 0.19 0.19 0.19 0.35 0.51 0.68 0.86 1.02 95% of shells land within +/- (mtr) 0.29 0.29 0.29 0.53 0.78 1.04 1.31 1.57 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.18 0.37 0.77 1.61 2.54 3.53 4.6 Hit Probability(%) 93 93 90 64 35 14 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 17 mtr  Armour Penetration inc roof at 1 mtr 1 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 17 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 1 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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