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French 3.94"
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this gun is the secondary armament of the Suffren class heavy cruisers now under construction.

          French 3.9"/55

     Caliber = 10.0 cm (3.9 inch)
     Shell weight = 16 kg (35 lbs)
     Muzzle velocity = 867 m/s (2845 fps)
     Relative ballistic performance: 0.86
     Muzzle energy = 6.020 megajoules = 2218.4 foot-tons
     Relative muzzle energy: 1.14
     Barrel length: 55 calibers

     Elevation          Range         Time      Velocity   Fall Angle
       2.5 deg        4600 meters     7.0 sec    515 m/s     3.6 deg
       5.0 deg        7200 meters    12.9 sec    388 m/s     8.5 deg
       7.5 deg        9000 meters    18.1 sec    324 m/s    14.2 deg
      10.0 deg       10400 meters    22.9 sec    287 m/s    20.2 deg
      12.5 deg       11500 meters    27.4 sec    266 m/s    26.3 deg
      15.0 deg       12500 meters    31.6 sec    253 m/s    32.0 deg
      20.0 deg       14000 meters    39.4 sec    244 m/s    42.1 deg
      25.0 deg       15100 meters    46.7 sec    246 m/s    50.3 deg
      30.0 deg       15900 meters    53.6 sec    252 m/s    56.8 deg
      35.0 deg       16500 meters    60.1 sec    260 m/s    61.9 deg
      40.0 deg       16700 meters    66.3 sec    269 m/s    66.0 deg
      45.0 deg       16700 meters    72.2 sec    277 m/s    69.4 deg
      50.0 deg       16300 meters    77.7 sec    285 m/s    72.2 deg

          Armor Penetration - Vertical Belt Armor
               (Relative armor quality, 0.90)
               Maximum penetration: 25.54 cm

     Elevation          Range            Belt       Deck
       1.7 deg        3500 meters        15 cm
       3.9 deg        6200 meters        10 cm
      11.1 deg       10900 meters         5 cm
      14.1 deg       12200 meters         ...        2 cm
      31.3 deg       16100 meters         ...        4 cm

     Maximum range = 16700 meters at 42.0 deg elevation
     Maximum altitude = 12230 meters at 85.0 deg elevation


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