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Russian 381mm/52
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This gun is the main armament of the Imperator Petr Veiliki Class Battleships. 

          Russian 381mm/52


     Caliber = 38.1 cm (15.0 inch)
     Shell weight = 900 kg (1984 lbs)
     Muzzle velocity = 829 m/s (2718 fps)

     Relative ballistic performance: 0.93

     Muzzle energy = 309.0 megajoules = 113852.2 foot-tons

     Relative muzzle energy: 1.05

     Barrel length: 52 calibers


     Elevation          Range         Time      Velocity   Fall Angle

       2.5 deg        5500 meters     7.2 sec    714 m/s     2.8 deg
       5.0 deg       10100 meters    14.1 sec    634 m/s     6.0 deg
       7.5 deg       14000 meters    20.6 sec    577 m/s     9.6 deg
      10.0 deg       17300 meters    26.9 sec    535 m/s    13.4 deg
      12.5 deg       20300 meters    32.9 sec    506 m/s    17.2 deg
      15.0 deg       23000 meters    38.8 sec    485 m/s    21.2 deg
      20.0 deg       27600 meters    49.9 sec    463 m/s    28.7 deg
      25.0 deg       31400 meters    60.6 sec    458 m/s    35.7 deg
      30.0 deg       34500 meters    70.7 sec    462 m/s    41.7 deg
      35.0 deg       37000 meters    80.4 sec    473 m/s    46.9 deg
      40.0 deg       38700 meters    89.6 sec    487 m/s    51.5 deg
      45.0 deg       39500 meters    98.3 sec    502 m/s    55.6 deg
      50.0 deg       39300 meters   106.4 sec    516 m/s    59.5 deg


          Armor Penetration - Vertical Belt Armor

               (Relative armor quality, 0.90)

               Maximum penetration: 92.57 cm


     Elevation          Range            Belt       Deck

       1.8 deg        4000 meters        80 cm
       2.5 deg        5500 meters         ...        2 cm
       2.6 deg        5800 meters        75 cm
       3.7 deg        7700 meters        70 cm
       4.5 deg        9200 meters         ...        4 cm
       4.8 deg        9800 meters        65 cm
       6.2 deg       12000 meters        60 cm
       6.5 deg       12500 meters         ...        6 cm
       7.9 deg       14500 meters        55 cm
       8.6 deg       15600 meters         ...        8 cm
       9.9 deg       17200 meters        50 cm
      11.1 deg       18700 meters         ...       10 cm
      12.6 deg       20400 meters        45 cm
      14.2 deg       22100 meters         ...       12 cm
      16.0 deg       24000 meters        40 cm
      17.7 deg       25500 meters         ...       14 cm
      20.0 deg       27600 meters         ...       16 cm
      20.9 deg       28300 meters        35 cm
      22.3 deg       29400 meters         ...       18 cm
      24.6 deg       31100 meters         ...       20 cm
      26.9 deg       32700 meters         ...       22 cm
      27.9 deg       33300 meters        30 cm
      29.2 deg       34100 meters         ...       24 cm
      31.6 deg       35400 meters         ...       26 cm
      34.1 deg       36600 meters         ...       28 cm
      36.4 deg       37500 meters         ...       30 cm
      38.1 deg       38100 meters        25 cm
      39.0 deg       38400 meters         ...       32 cm
      41.6 deg       39000 meters         ...       34 cm
      44.2 deg       39400 meters         ...       36 cm
      46.9 deg       39600 meters         ...       38 cm
      49.5 deg       39400 meters         ...       40 cm


     Maximum range = 39600 meters at 46.8 deg elevation


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