USSR
IS I - 100

Tweet The IS I - 100 based on the existing IS and was in use from 1944. General Details Specifications Operational Date(s) 1944 Ordnance classification Quantity Produced 0 Weight unknown Crew 4 M.G's small 4 M.G's large(>10mm) n/a Length 8.40 mtr Width 3.15 mtr Height 2.74 mtr Engine Details/Performance Max Road Speed 23 mph Max Cross Country Speed 12 mph Range Road 150 miles Range Cross Country 130 miles Fuel Type Unknown Fuel Capacity 115 gal Horse Power 513 hp Power/Weight unknown General Information The IS I - 100 based on the existing IS and was in use from 1944. It was armed with 4 light machine guns. Its main armament consisted of a 100mm Gun D-10 L/54 which could penetrate 176 mm of flat plate at 400 metres Armour Details Turret Front 102mm @ 10° (104mm) Side 75mm @ 10° (76mm) Rear 50mm @ 10° (51mm) Top 35mm @ 90° (35mm) Superstructure Front 120mm @ 45° (170mm) Side 90mm @ 30° (104mm) Rear 64mm @ 20° (68mm) Top 25mm @ 90° (25mm) Hull Front 120mm @ 45° (170mm) Side 90mm @ 0° (90mm) Rear 64mm @ 0° (64mm) Top 25mm @ 90° (25mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 170 mm - Minimum 25 mm Weapon Details 100mm Gun D-10 L/54 Calibre 100mm Length L/54   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content BR-412 APHE (APHE Armor Piercing High Explosive) 100mm 15.6Kg 895M/Sec Quoted Penetration 160mm @ 500mtr/30° ( ≈ 184mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.11 0.23 0.47 0.97 1.52 2.13 2.79 3.53 Penetration(mm@30°) 180 167 152 135 119 103 90 77 Penetration(mm@0°) 208 193 176 156 138 120 104 89 Hit Probability(%) 98 98 98 98 85 60 39 22 FA-412 HE (HE High Explosive) 100mm 15.8Kg 900M/Sec ≈2.37Kg explosive Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.23 2.78 4.76 7.41 11.11 16.67 25.93 44.46 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.11 0.23 0.46 0.97 1.52 2.12 2.78 3.51 Hit Probability(%) 98 98 98 98 85 60 39 22 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 4 mtr Burst radius Infantry in open 66% kill 9 mtr Burst radius Infantry in open 33% kill 22 mtr  Armour Penetration inc roof at 1 mtr 7 mm An explosion within 4 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 9 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 22 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 7 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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