The Gloriana's superposed guns appear to use different barrel sizes. American pre-dreadnought battleships provide a real comparison because some mounted secondary turrets directly above primary turrets. Combining different calibres and stacking their mountings produced targeting and mechanical complications. An impressive concentration of guns can therefore make fire control and machinery harder rather than simply multiplying useful firepower.
Notable Point · 1:12:16-1:13:05
Mixed calibres and superposed turrets complicate fire control
The Gloriana model prompts a real-world comparison with American pre-dreadnoughts that mounted secondary turrets above their main battery.