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French 6"
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This gun is the main armament of the de Grasse Class Light Cruisers.

            French 6"/50

     Caliber = 15.2 cm (6.0 inch)
     Shell weight = 50 kg (110 lbs)
     Muzzle velocity = 866 m/s (2839 fps)
     Relative ballistic performance: 0.86
     Muzzle energy = 18.729 megajoules = 6901.8 foot-tons
     Relative muzzle energy: 1.00
     Barrel length: 50 calibers

     Elevation          Range         Time      Velocity   Fall Angle
       2.5 deg        5000 meters     7.2 sec    569 m/s     3.4 deg
       5.0 deg        8100 meters    13.4 sec    444 m/s     7.8 deg
       7.5 deg       10300 meters    19.0 sec    376 m/s    13.0 deg
      10.0 deg       12100 meters    24.2 sec    335 m/s    18.5 deg
      12.5 deg       13500 meters    29.0 sec    310 m/s    23.9 deg
      15.0 deg       14800 meters    33.6 sec    295 m/s    29.3 deg
      20.0 deg       16800 meters    42.3 sec    282 m/s    39.1 deg
      25.0 deg       18300 meters    50.4 sec    283 m/s    47.2 deg
      30.0 deg       19500 meters    58.0 sec    289 m/s    53.6 deg
      35.0 deg       20300 meters    65.3 sec    298 m/s    58.9 deg
      40.0 deg       20800 meters    72.2 sec    308 m/s    63.1 deg
      45.0 deg       20900 meters    78.7 sec    319 m/s    66.5 deg
      50.0 deg       20600 meters    84.9 sec    328 m/s    69.6 deg

          Armor Penetration - Vertical Belt Armor
               (Relative armor quality, 0.90)
               Maximum penetration: 35.74 cm

     Elevation          Range            Belt       Deck
       1.4 deg        3200 meters        25 cm
       2.6 deg        5100 meters        20 cm
       4.7 deg        7700 meters        15 cm
       7.4 deg       10300 meters         ...        2 cm
       9.1 deg       11500 meters        10 cm
      18.4 deg       16200 meters         ...        4 cm
      23.8 deg       18000 meters         5 cm
      28.9 deg       19300 meters         ...        6 cm
      41.9 deg       20900 meters         ...        8 cm

     Maximum range = 20900 meters at 43.8 deg elevation


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