The bulk of a dreadnought’s armor was concentrated around the “armored citadel”. This was a box, with four armored walls and an armored roof, around the most important parts of the ship. The sides of the citadel were the “armored belt” of the ship, which...
Armor
Much of the displacement of a dreadnought was taken up by the steel plating of its armor. Designers spent much time and effort to provide the best possible protection for their ships against the various weapons they would be faced with. However, only so much...
Secondary armament
The first dreadnoughts tended to have a very light secondary armament intended to protect them from torpedo boats. Dreadnought herself carried 12-pounder guns; each of her twenty-two 12-pounders could fire at least 15 rounds a minute at any torpedo boat making an attack.[57] The South...
Main armament power and caliber
Rather than try to fit more guns onto a ship, it was possible to increase the power of each gun. This could be done by increasing either the caliber of the weapon and hence the weight of shell, or by lengthening the barrel to increase...
Position of main armament
The effectiveness of the guns depended in part on the layout of the turrets. Dreadnought, and the British ships which immediately followed her, carried five turrets: one forward and two aft on the centerline of the ship, and two in the ‘wings’ next to the...
Armament
Dreadnoughts mounted a uniform main battery of heavy-caliber guns; the number, size, and arrangement differed between designs. Dreadnought herself mounted ten 12-inch (305 mm) guns. 12-inch guns had been standard for most navies in the pre-dreadnought era and this continued in the first generation of...
Design
The designers of dreadnoughts sought to provide as much protection, speed, and firepower as possible in a ship of a realistic size and cost. The hallmark of dreadnought battleships was an “all-big-gun” armament, but they also had heavy armor concentrated mainly in a thick belt...
Building the first dreadnoughts
In Japan, the two battleships of the 1903–04 Programme were the first in the world to be laid down as all-big-gun ships, with eight 12-inch (305 mm) guns. However, the armour of their design was considered too thin, demanding a substantial redesign.[28] The financial pressures...
Switch to all-big-gun designs
The replacement of the 6-inch (152 mm) or 8-inch (203 mm) guns with weapons of 9.2-inch (234 mm) or 10-inch (254 mm) caliber improved the striking power of a battleship, particularly at longer ranges. However, uniform heavy-gun armament offered many other advantages. One advantage was...
All-big-gun mixed-caliber ships
An evolutionary step toward building more powerful battleships was to reduce the secondary battery mounted in barbettes and substitute additional turret-mounted heavy guns, typically 9.2-inch (234 mm) or 10-inch (254 mm). These ships have been described as ‘all-big-gun mixed-caliber’ or later ‘semi-dreadnoughts’. A distinguishing feature...