Is a six-gun 18-inch broadside too small?

Would three twin 18-inch turrets be too little armament for a battle design?

No. Six 18-inch guns would exceed the broadside weight of eight 15-inch or ten 13.5-inch guns, while eight 18-inch guns would demand a larger hull.

Six 18-inch guns are judged sufficient because the increase in shell size gives more broadside weight than eight 15-inch or ten 13.5-inch guns. The comparison uses the square-cube relationship to explain why counting barrels alone can mislead. Six guns are treated as the minimum acceptable battery. Three twin turrets could plausibly fit a Queen Elizabeth-sized hull, while an eight-gun arrangement is expected to require a larger ship.