The entry point on a cross section diagram of a target illustrating the penetration of shot fired from a 110 ton BL gun, Royal Naval Exhibition, Chelsea
A cross section diagram of a target illustrating the penetration of shot fired from a 110 ton breech-loading gun, Royal Naval Exhibition, Chelsea. This is the entry point of the diagram, the rest of the illustration is ALB1386.25. This diagram is based on the shell fired by a 110-ton gun from the battleship HMS 'Sanpareil' (1887) at Shoeburyness in March 1890. According to the Illustrated Handbook (p. 60) the shell 'tore its way at the rate of 2,079ft per second through 20 inches of compound armour; 8 inches of iron fastened in a heavy wrought-iron frame[...]; 20ft of oak baulks; 5ft of granite blocks; 11ft of concrete; and 6ft of bricks; altogether, 44ft 4 inches of a [target] wall...' .