Union Soviet Socialist Republics 45mm M1942 L/66

Showing the details of the shells used(where known)   Tweet Weapon Details 45mm M1942 L/66 (Machine Gun) History This was the 45mm M1937 with a longer L/66 barrel Manufactured 1942 - 1945 Calibre 45mm Length L/66 Rate of Fire 20 rpm   UBR-243SP (AP Armor Piercing) 45mm 1Kg 870M/Sec Quoted Penetration 54mm @ 500mtr/30° ( ≈ 62mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.12 0.24 0.51 1.12 1.88 2.86 4.14 5.91 Penetration(mm@30°) 51 46 41 34 28 22 17 12 Penetration(mm@0°) 60 54 48 40 33 26 20 15 Hit Probability(%) 98 98 98 96 74 34 15 3 45mm L/66 APCR (APCR Armor Piercing Composite Rigid) 45mm 0.85Kg 870M/Sec Quoted Penetration 74mm @ 500mtr/30° ( ≈ 85mm/0°) Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.12 0.25 0.53 1.25 2.3 3.94 6.91 13.88 Penetration(mm@30°) 97 88 76 59 44 31 19 10 Penetration(mm@0°) 113 102 88 69 51 36 23 12 Hit Probability(%) 98 98 98 93 57 22 3 0 45mm L/66 HE (HE High Explosive) 45mm 2.14Kg 870M/Sec ≈0.321Kg explosive Maximum Range 8900 Mtr Range(Mtr) 1000 2000 3000 4000 5000 6000 7000 8000 Flight Time(Secs) 1.48 4.14 10.35 41.55 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.12 0.24 0.5 1.12 1.88 2.86 4.14 5.92 Hit Probability(%) 98 98 98 96 74 34 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 15 mtr  Armour Penetration inc roof at 1 mtr 0 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 not cause any significant armour damage.

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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