N3-class battleship

Class overview
Name	N3
Operators	Royal Navy
Preceded by	Revenge class
Succeeded by	Nelson class
Planned	4
Cancelled	4
General characteristics
Type	Battleship
Displacement	about 48,500 long tons (49,300 t)
Length	820 ft (249.9 m)
Beam	106 ft (32.3 m)
Draught	33 ft (10.1 m) (at deep load)
Installed power	20 Yarrow boilers; 56,000 shp (42,000 kW);
Propulsion	2 shafts; 2 geared steam turbine sets
Speed	23 knots (43 km/h; 26 mph)
Armament	3 × triple 18 in (457 mm) guns; 8 × twin 6 in (152 mm) guns; 6 × single 4.7 in (120 mm) AA guns; 4 × 10-barrel 2-pdr (40 mm (1.6 in)) AA guns; 2 × 24.5 in (622 mm) torpedo tubes;
Armour	Belt: 13.5–15 in (343–381 mm); Deck: 6–8 in (152–203 mm); Barbettes: 15 in (381 mm); Turrets: 10–18 in (254–457 mm); Conning tower: 15 in (381 mm); Bulkheads: 9–14 in (229–356 mm);

The N3 class was a dreadnought battleship class designed for the Royal Navy after World War I, incorporating lessons learned from that conflict. They were similar in design to the G3-class battlecruiser, but had larger guns and thicker armour. They were never ordered due to signing of the Washington Naval Treaty in 1922, which limited the size and armament of battleships to 35,000 long tons (36,000 t) and guns no bigger than 16 inches (406 mm).

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