Quadruple mounts could reduce the number of barbettes and concentrate armament, but a usable installation demanded beam and internal space. If the ship remained constrained by major canals, crews and machinery became crowded. If it grew wide enough to relieve that crowding, the strategic mobility advantage disappeared. The King George V and Dunkerque classes show why operational reliability could outweigh attractive paper savings and why later designers often returned to triples.
Notable Point · 35:35-40:38
Why quadruple turrets looked better on paper
A comparison of British and French quad mounts shows how canal limits, cramped machinery, and reliability eroded paper savings.