How useful would Germany's unmounted First World War 14-inch guns be as twin-turret replacements for triple mounts?
Short answerThey would add firepower, but German yard limits and a quicker British counter-program could turn the retrofit into a net strategic disadvantage.
NotesReplacing German triple turrets with twin 14-inch mounts would improve the striking power of ships armed with 12- or 13.5-inch equivalents. The weapons would still fall short of Britain's 15-inch ships. More importantly, Germany had less industrial capacity for fleet-wide conversions, while Britain could answer with its own gun upgrades and continue new construction. A retrofit program could delay a fleet action such as Jutland until additional Renown-, Repulse-, and Revenge-class ships strengthened the Royal Navy. The technical improvement therefore risks worsening Germany's relative position.