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Russian 234mm/40
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This gun is the main armament of the Don class river monitor.

          234mm/40

     Caliber = 23.4 cm (9.2 inch)
     Shell weight = 200 kg (441 lbs)
     Muzzle velocity = 710 m/s (2330 fps)
     Relative ballistic performance: 0.90
     Muzzle energy = 50.453 megajoules = 18592.1 foot-tons
     Relative muzzle energy: 0.74
     Barrel length: 40 calibers

     Elevation          Range         Time      Velocity   Fall Angle
       2.5 deg        4000 meters     6.2 sec    588 m/s     2.9 deg
       5.0 deg        7100 meters    11.9 sec    510 m/s     6.3 deg
       7.5 deg        9700 meters    17.4 sec    456 m/s    10.2 deg
      10.0 deg       11800 meters    22.5 sec    418 m/s    14.2 deg
      12.5 deg       13700 meters    27.5 sec    391 m/s    18.5 deg
      15.0 deg       15300 meters    32.2 sec    373 m/s    22.7 deg
      20.0 deg       18100 meters    41.3 sec    353 m/s    31.1 deg
      25.0 deg       20300 meters    49.8 sec    347 m/s    38.5 deg
      30.0 deg       21900 meters    57.8 sec    350 m/s    45.0 deg
      35.0 deg       23200 meters    65.4 sec    357 m/s    50.5 deg
      40.0 deg       23900 meters    72.6 sec    367 m/s    55.3 deg
      45.0 deg       24100 meters    79.4 sec    377 m/s    59.5 deg
      50.0 deg       23800 meters    85.7 sec    388 m/s    63.2 deg

          Armor Penetration - Vertical Belt Armor
               (Relative armor quality, 1.00)
               Maximum penetration: 39.13 cm

     Elevation          Range            Belt       Deck
       1.0 deg        1700 meters        35 cm
       2.7 deg        4200 meters        30 cm
       5.0 deg        7100 meters        25 cm
       5.3 deg        7500 meters         ...        2 cm
       8.6 deg       10600 meters        20 cm
      11.3 deg       12800 meters         ...        4 cm
      14.8 deg       15200 meters        15 cm
      19.0 deg       17600 meters         ...        6 cm
      25.1 deg       20300 meters         ...        8 cm
      28.3 deg       21400 meters        10 cm
      31.4 deg       22300 meters         ...       10 cm
      38.3 deg       23700 meters         ...       12 cm
      45.8 deg       24100 meters         ...       14 cm

     Maximum range = 24100 meters at 44.7 deg elevation


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