mk1 


     Caliber = 27.5 cm (10.8 inch) 
     Shell weight = 260 kg (573 lbs) 
     Muzzle velocity = 794 m/s (2603 fps) 

     Relative ballistic performance: 0.60 

     Muzzle energy = 81.892 megajoules = 30177.1 foot-tons 

     Relative muzzle energy: 0.74 

     Barrel length: 40 calibers 


     Elevation          Range         Time      Velocity   Fall Angle 

       2.5 deg        4400 meters     6.7 sec    567 m/s     3.2 deg 
       5.0 deg        7400 meters    12.6 sec    457 m/s     7.2 deg 
       7.5 deg        9700 meters    18.1 sec    391 m/s    12.0 deg 
      10.0 deg       11500 meters    23.2 sec    350 m/s    17.1 deg 
      12.5 deg       13000 meters    28.0 sec    325 m/s    22.2 deg 
      15.0 deg       14300 meters    32.5 sec    308 m/s    27.2 deg 
      20.0 deg       16400 meters    41.1 sec    293 m/s    36.7 deg 
      25.0 deg       18000 meters    49.1 sec    292 m/s    44.7 deg 
      30.0 deg       19200 meters    56.6 sec    297 m/s    51.3 deg 
      35.0 deg       20100 meters    63.8 sec    305 m/s    56.7 deg 
      40.0 deg       20600 meters    70.6 sec    315 m/s    61.1 deg 
      45.0 deg       20700 meters    77.0 sec    325 m/s    64.8 deg 
      50.0 deg       20300 meters    83.0 sec    335 m/s    68.0 deg 


          Armor Penetration - Vertical Belt Armor 

               (Relative armor quality, 1.00) 

               Maximum penetration: 45.98 cm 


     Elevation          Range            Belt       Deck 

       1.4 deg        2700 meters        35 cm
       2.3 deg        4200 meters        30 cm
       3.7 deg        6000 meters        25 cm
       5.1 deg        7600 meters         ...        2 cm 
       5.9 deg        8300 meters        20 cm
       9.6 deg       11200 meters        15 cm
      12.7 deg       13100 meters         ...        4 cm 
      17.5 deg       15400 meters        10 cm
      19.6 deg       16200 meters         ...        6 cm 
      26.7 deg       18400 meters         ...        8 cm 
      34.5 deg       20000 meters         ...       10 cm 
      40.8 deg       20600 meters         5 cm
      43.7 deg       20700 meters         ...       12 cm 


     Maximum range = 20700 meters at 43.8 deg elevation