The case for an Agincourt with six 18-inch guns

Clarke reconstructs Agincourt as a Queen Elizabeth derivative with six 18-inch guns in three twin turrets and a target speed of roughly 28 knots. One clue is the small-tube boilers transferred to Courageous and Glorious, which he connects to an earlier order for Agincourt. The intended mixed firing of the R-class battleships is part of his reason for excluding them as the original recipient. A six-gun design study later used for Renown and contemporary 18-inch gun work provide further clues, although the original documentation tying them together is missing. With two turrets forward and one aft, the proposed ship would combine battlecruiser speed with Queen Elizabeth-scale protection. Its heavy shells would give it the broadside weight and armour-piercing power of a larger battleship despite the relatively small gun count. This remains a reconstruction from surviving clues.