USSR
SU-122

Tweet The SU-122 based on the existing SP Gun and was in use from 1943. General Details Specifications Operational Date(s) 1943 Ordnance classification Quantity Produced 0 Weight unknown Crew 4 M.G's small n/a M.G's large(>10mm) n/a Length 6.95 mtr Width 3.26 mtr Height 2.65 mtr Engine Details/Performance Max Road Speed 27 mph Max Cross Country Speed 15 mph Range Road 210 miles Range Cross Country unknown Fuel Type Diesel Fuel Capacity unknown Horse Power 600 hp Power/Weight unknown General Information The SU-122 based on the existing SP Gun and was in use from 1943. Its main armament consisted of a 122mm Corps Gun M1931/1937 A19 L/45 which could penetrate 194 mm of flat plate at 800 metres Armour Details Turret Front n/a Side n/a Rear n/a Top n/a Superstructure Front 45mm @ 45° (64mm) Side 45mm @ 45° (64mm) Rear 45mm @ 45° (64mm) Top 20mm @ 90° (20mm) Hull Front 45mm @ 45° (64mm) Side 45mm @ 0° (45mm) Rear 45mm @ 0° (45mm) Top 20mm @ 90° (20mm) Armour (x)mm @ (y)° (Effective mm @ 0°) Effective Armour - Maximum 64 mm - Minimum 20 mm Weapon Details 122mm Corps Gun M1931/1937 A19 L/45 Manufactured 1938 - unknown Calibre 122mm Length L/45   Ammunition Details Name/Id Calibre Weight MVelocity Explosive Content OF-471 (APHE Armor Piercing High Explosive) 122mm 25Kg 800M/Sec Quoted Penetration 120mm @ 500mtr/30° ( ≈ 138mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.25 0.52 1.07 1.66 2.3 2.99 3.73 Penetration(mm@30°) 212 199 185 168 152 137 122 109 Penetration(mm@0°) 245 230 214 194 176 159 142 126 Hit Probability(%) 98 98 98 98 81 57 29 22 OF-471 (HE High Explosive) 122mm 25Kg 800M/Sec 3.600Kg explosive Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.36 2.99 4.97 7.44 10.59 14.76 20.53 29.05 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.13 0.25 0.52 1.07 1.66 2.3 2.99 3.73 Hit Probability(%) 98 98 98 98 81 57 29 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 24 mtr  Armour Penetration inc roof at 1 mtr 10 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 24 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 10 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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