This page is a collection of 8" (20.3 cm) guns built by Armstrong/EOC and Vickers for export. Links are provided to those that are detailed on their own datapage.
Apparently the first 8" (20.3 cm) BL gun built by EOC. Body plan was dated 05 October 1878. No details survive.
Used on the Argentine ironclad Almirante Brown (1880) in eight single mountings. Weight 11 tons 13 cwt. Overall length 220.7 in (560.6 cm). Fired solid shot of 180 lbs. (81.6 kg). MV was 1,968 fps. (600 mps) with a charge of 90 lbs. (41 kg) prismatic powder. In 1897-98 they were replaced with Canet 15 cm guns.
Proposed gun, does not seem to have moved off the drawing board. Weight 11 tons 17 cwt 1 qtr. Overall length 222.5 in (565 cm). Fired solid shot of 180 lbs. (81.6 kg). Charge of 100 lbs. (45.4 kg). Charge type and MV not given.
Use not known. Pattern D was hooped to the muzzle. Weight 12 tons 8 cwt 3 qtr. Overall length 222.5 in (565 cm). Fired solid shot of 180 lbs. (81.6 kg). MV 2,177 fps (645 mps) with a charge of 120 lbs. (54.4 kg) Cordite.
A reworked gun for the South Australian gunboat Protector (1884). Existing plan of 20 January 1893 shows chase hooping. Weight 11.5 tons. Fired shell of 180 lbs. (81.6 kg). MV 2,030 fps (619 mps) with a charge of 90 lbs. (41 kg) of pebble powder.
Use unknown. Weight 11 tons 19 cwt 14 lbs. Overall length 222.5 in (565 cm), bore 210 in (533 cm). Fired solid shot of 180 lbs. (81.6 kg). MV 2,136 fps (651 mps) with a charge of 120 lbs. (54.4 kg) Cordite.
Pattern K weight 13 tons 10 cwt 1 qtr. Total length 254.5 in (646 cm), bore 240 in (610 cm). Fired solid shot of 180 lbs. (81.6 kg). MV 2,307 fps (703 mps) with a charge of 120 lbs. (54.4 kg) Cordite.
Pattern KI weight and lengths the same. With a 210 lbs. (95 kg) solid shot and a 40 lbs. (18.1 kg) charge of 0.4 Cordite had an MV of 2,215 fps (675 mps). With a solid shot of 180 lbs. (81.6 kg) and a 110 lbs. (49.4 kg) charge of brown powder had an MV of 2,230 fps (680 mps). Six Pattern KI guns used in 1888 to rearm the Chilean ironclad Admiral Cochrane (1874), replacing six Pattern J 9" (22.9 cm) MLR.
Use unknown. Weight 13 tons 5 cwt 3 qtr. Overall length 222.5 in (565 cm), bore 209.9 in (533 cm). Fired solid shot of 210 lbs. (95 kg). MV 1,921 fps (586 mps) with a charge of 110 lbs. (49.4 kg) Cordite.
Use unknown. Weight 14 tons 15 cwt 1 qtr 20 lbs. Overall length 280 in (711 cm). Fired solid shot of 210 lbs. (95 kg). MV 2,095 fps (639 mps) with a charge of 110 lbs. (49.4 kg) Brown Powder.
Two guns for the Chilean Protected Cruiser Blanco Encalada (1893). Weight 15 tons 7 cwt 3 qtr. Overall length 383 in (973 cm), bore 322.7 in (820 cm). Fired solid shot of 210 lbs. (95 kg). MV 2,250 fps (686 mps) with a charge of 32 lbs. (14.6 kg) Cordite. With a 250 lbs. (113.4 kg) shell MV was 2,008 fps (612 mps). With a 44 lbs. (20 kg) charge of cordite MVs were 2,570/2,369 fps (783/722 mps).
First EOC wire-wound 8" (20.3 cm) gun, use unknown. Weight 19 tons 3 cwt. Overall length 370.52 in (941 cm), bore 350 in (889 cm). Fired solid shot of 210 lbs. (95 kg). MV 2,650 fps (808 mps) with a charge of 46 lbs. (20.9 kg) 0.4 Cordite. With a 250 lbs. (113.4 kg) shell MV was 2,480 fps (612 mps).
Use unknown. Weight 15 tons 16 cwt. Overall length 333 in (846 cm), bore 322.48 in (819 cm). Fired solid shot of 210 lbs. (95 kg). MV 2,250 fps (686 mps) with a charge of 29.75 lbs. (13.5 kg) 0.35 Cordite.
Built for the Japanese Protected Cruiser Takasago and probably for the Chinese Hai Chi class and the Argentine cruisers Buenos Aires (1895) and Chacabuco [A Note on Sources: "Naval Weapons of World War One" incorrectly describes Chacabuco as a Brazilian cruiser (pg. 75)]. Weight 18 tons 10 cwt. Overall length 373.52 in (949 cm), bore 363 in (922 cm). As introduced into service, fired 210 lbs. (95 kg) and 250 lbs. (113.4 kg) shells. With a charge of 48 lbs. (21.8 kg) Cordite MV was 2,660/2,500 fps (811/762 mps). See 8"/45 (20.3 cm) EOC Patterns S for details on Japanese guns.
Built for the Chilean armored cruiser O'Higgens (1896) and the TI for the Portuguese battleship Vasco da Gama as rearmed in 1902. Pattern T weight 16 tons 10 cwt 3 qtr 14 lbs and Pattern TI weight 16 tons 10 cwt 3 qtr 14 lbs. Overall length of both guns 333.52 in (847 cm), bore of both guns 323 in (820.4 cm). Fired shells of 210 lbs. (95 kg). MV 2,575 fps (785 mps) with a charge of 44 lbs. (20 kg) 0.4 Cordite.
Built for Japanese armored cruisers built after 1899. See 8"/45 (20.3 cm) EOC Patterns U for details.
Built for Italian Regina Elena class pre-dreadnoughts as secondary weapons and as the main guns for the Garibaldi class armored cruisers sold to other nation. See 8"/45 (20.3 cm) EOC Pattern W for details.
Built for the Russian armored cruiser Rurik (II). See Russian 8"/50 (20.3 cm) Pattern 1905 for details.
These were used as heavy secondary weapons for Russian ships and were also built by OSZ. See Russian 8"/50 (20.3 cm) Pattern 1905 for details.
Built for the Spanish cruisers of the Canaris class. See 8"/50 (20.3 cm) BL Model 1924 Mark D.
Campbell, John
- "British Naval Guns 1880-1945 No 9" article in "Warship Volume VII"
- "Naval Weapons of World War Two"
Fraccaroli, Aldo
- "Italian Warships of World War II"
Friedman, Norman
- "Naval Weapons of World War One"
Lacroix, Eric and Wells II, Linton
- "Japanese Cruisers of the Pacific War"
27 October 2026 - New Datapage