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French 274mm/45
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This gun was the secondary armament of several French predreadnought battleships.  They have been refurbished for use as coast artillery and railroad guns.


          French 274mm/45 refurbished

     Caliber = 27.4 cm (10.8 inch)
     Shell weight = 320 kg (705 lbs)
     Muzzle velocity = 770 m/s (2524 fps)
     Relative ballistic performance: 0.96
     Muzzle energy = 94.772 megajoules = 34923.5 foot-tons
     Relative muzzle energy: 0.87
     Barrel length: 45 calibers

     Elevation          Range         Time      Velocity   Fall Angle
       2.5 deg        4700 meters     6.7 sec    644 m/s     2.9 deg
       5.0 deg        8400 meters    13.0 sec    561 m/s     6.3 deg
       7.5 deg       11500 meters    18.9 sec    504 m/s    10.0 deg
      10.0 deg       14200 meters    24.5 sec    464 m/s    13.9 deg
      12.5 deg       16500 meters    30.0 sec    435 m/s    18.2 deg
      15.0 deg       18500 meters    35.2 sec    416 m/s    22.3 deg
      20.0 deg       21900 meters    45.2 sec    395 m/s    30.4 deg
      25.0 deg       24700 meters    54.6 sec    389 m/s    37.7 deg
      30.0 deg       26900 meters    63.5 sec    393 m/s    44.0 deg
      35.0 deg       28600 meters    72.0 sec    402 m/s    49.4 deg
      40.0 deg       29600 meters    80.0 sec    413 m/s    54.0 deg
      45.0 deg       30100 meters    87.6 sec    426 m/s    58.1 deg
      50.0 deg       29800 meters    94.7 sec    438 m/s    61.9 deg

          Armor Penetration - Vertical Belt Armor
               (Relative armor quality, 0.95)
               Maximum penetration: 54.47 cm

     Elevation          Range            Belt       Deck
       1.9 deg        3700 meters        45 cm
       3.3 deg        6000 meters        40 cm
       3.9 deg        6900 meters         ...        2 cm
       5.2 deg        8700 meters        35 cm
       7.6 deg       11600 meters         ...        4 cm
       7.7 deg       11700 meters        30 cm
      11.4 deg       15500 meters        25 cm
      12.2 deg       16200 meters         ...        6 cm
      17.3 deg       20100 meters        20 cm
      18.0 deg       20600 meters         ...        8 cm
      22.1 deg       23200 meters         ...       10 cm
      26.4 deg       25400 meters         ...       12 cm
      28.0 deg       26100 meters        15 cm
      30.8 deg       27200 meters         ...       14 cm
      35.4 deg       28700 meters         ...       16 cm
      40.3 deg       29700 meters         ...       18 cm
      45.4 deg       30100 meters         ...       20 cm
      47.5 deg       30100 meters        10 cm

     Maximum range = 30100 meters at 45.7 deg elevation


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