The 5.1in/50 gun

The British came very close to adopting a 5.1in gun similar to that used by the Germans and French. The actual caliber was 13cm, but the gun was typically referred to as a 5.1in gun. With a heavy shot, this gun is also quite potent for its size. The piece would weigh 5 tons and has a 71 lbs shot. The muzzle velocity is 2774 ft/sec. The gun performance looks like this:

               Maximum penetration: 13.33 inches


     Elevation          Range            Belt       Deck

       1.9 deg        4100 yards          8 in
       3.6 deg        6400 yards          6 in
       7.1 deg        9800 yards          4 in
      12.8 deg       13300 yards          ...        1 in
      18.6 deg       15600 yards          2 in
      27.1 deg       17900 yards          ...        2 in
      47.7 deg       19300 yards          ...        3 in


     Maximum range = 19500 yards at 42.5 deg elevation