were the Royal Navy's
first super-dreadnought. The first of the four ship class was HMS Orion
, being laid down on the 29th November 1909
and launched on the 20th August 1910
, being commissioned in January 1912
. They were the first dreadnoughts to have all their main guns in the centerline as well as re-introducing the massive 13.5-inch main armament, not seen in Royal Navy
service on their battleships since the 1891
Royal Sovereign-class . They had a relatively short career, all being decommissioned and disposed of in various ways in the 20s
, due to the Washington Treaty
Ships of the class
- Conqueror - Served in WWI. She was decommissioned in 1921 and scrapped in 1922.
- Monarch - Served in WWI. She was decommissioned in 1921, serving as an experimental ship and eventually sunk as a target by HMS Revenge in 1925.
- Orion - Served in WWI. She was decommissioned in 1921 and sold for scrap in 1922.
- Thunderer - Served in WWI. She was decommissioned in 1921, serving as a cadet ship from 1922, becoming the last surviving ship of the class until she was scrapped in December 1926.
- Displacement: 22,000 tons standard/25,870 tons max
- Length: 581ft/177m
- Beam: 88ft/27m
- Draught: 24ft/7m
- Armament: 10 x 13.5-inch guns, 16 x 4-inch guns, 4 x 47mm, 3 x 21-inch submered torpedo tubes
- Complement: 752
- Speed: 21 knots
- Propulsion: Steam turbines, 18 boilers, 4 shafts, 27,000hp