mk1 


     Caliber = 10.5 cm (4.1 inch) 
     Shell weight = 15 kg (33 lbs) 
     Muzzle velocity = 905 m/s (2967 fps) 

     Relative ballistic performance: 0.70 

     Muzzle energy = 6.137 megajoules = 2261.7 foot-tons 

     Relative muzzle energy: 1.00 

     Barrel length: 50 calibers 


     Elevation          Range         Time      Velocity   Fall Angle 

       2.5 deg        4300 meters     7.0 sec    445 m/s     4.1 deg 
       5.0 deg        6400 meters    12.5 sec    322 m/s     9.8 deg 
       7.5 deg        7800 meters    17.3 sec    266 m/s    16.3 deg 
      10.0 deg        8800 meters    21.7 sec    235 m/s    23.3 deg 
      12.5 deg        9600 meters    25.7 sec    219 m/s    29.9 deg 
      15.0 deg       10200 meters    29.4 sec    210 m/s    35.9 deg 
      20.0 deg       11300 meters    36.4 sec    205 m/s    46.5 deg 
      25.0 deg       12000 meters    42.9 sec    208 m/s    54.8 deg 
      30.0 deg       12500 meters    49.0 sec    214 m/s    61.1 deg 
      35.0 deg       12800 meters    54.8 sec    221 m/s    66.0 deg 
      40.0 deg       12900 meters    60.3 sec    228 m/s    69.8 deg 
      45.0 deg       12800 meters    65.4 sec    234 m/s    72.8 deg 
      50.0 deg       12400 meters    70.3 sec    240 m/s    75.4 deg 


          Armor Penetration - Vertical Belt Armor 

               (Relative armor quality, 1.00) 

               Maximum penetration: 21.41 cm 


     Elevation          Range            Belt       Deck 

       1.8 deg        3400 meters        10 cm
       5.4 deg        6600 meters         5 cm
      20.9 deg       11400 meters         ...        2 cm 


     Maximum range = 12900 meters at 39.4 deg elevation