105mm cal.70 mk1 


     Caliber = 10.5 cm (4.1 inch) 
     Shell weight = 15 kg (33 lbs) 
     Muzzle velocity = 1132 m/s (3713 fps) 

     Relative ballistic performance: 0.90 

     Muzzle energy = 9.611 megajoules = 3541.7 foot-tons 

     Relative muzzle energy: 1.57 

     Barrel length: 70 calibers 


     Elevation          Range         Time      Velocity   Fall Angle 

       2.5 deg        6200 meters     8.5 sec    510 m/s     4.3 deg 
       5.0 deg        9100 meters    15.1 sec    364 m/s    10.4 deg 
       7.5 deg       10900 meters    20.8 sec    300 m/s    17.3 deg 
      10.0 deg       12300 meters    25.9 sec    267 m/s    24.3 deg 
      12.5 deg       13400 meters    30.6 sec    250 m/s    31.0 deg 
      15.0 deg       14300 meters    35.1 sec    241 m/s    37.3 deg 
      20.0 deg       15800 meters    43.4 sec    237 m/s    47.6 deg 
      25.0 deg       17000 meters    51.2 sec    242 m/s    55.5 deg 
      30.0 deg       17900 meters    58.7 sec    251 m/s    61.6 deg 
      35.0 deg       18400 meters    65.8 sec    260 m/s    66.1 deg 
      40.0 deg       18800 meters    72.5 sec    269 m/s    69.6 deg 
      45.0 deg       18800 meters    79.0 sec    277 m/s    72.5 deg 
      50.0 deg       18400 meters    85.1 sec    284 m/s    74.9 deg 


          Armor Penetration - Vertical Belt Armor 

               (Relative armor quality, 1.00) 

               Maximum penetration: 28.87 cm 


     Elevation          Range            Belt       Deck 

       1.2 deg        3800 meters        15 cm
       2.5 deg        6200 meters        10 cm
       6.8 deg       10400 meters         5 cm
      16.1 deg       14700 meters         ...        2 cm 
      42.1 deg       18800 meters         ...        4 cm 


     Maximum range = 18800 meters at 42.6 deg elevation