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Yakumo 1913

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
八雲 [Yakumo]		240	Vulcan, Stettin, Germany	3/1898	8.7.1899	20.6.1900	surrendered 8.1945, BU 1947

Technical data

Displacement normal, t	9646
Displacement full, t	10300
Length, m	124.6 pp 132.3 oa
Breadth, m	19.6
Draught, m	7.24
No of shafts	2
Machinery	2 VTE, 24 Belleville boilers
Power, h. p.	15500
Max speed, kts	20.5
Fuel, t	coal 1242
Endurance, nm(kts)	7000(10)
Armour, mm	belt: 178 - 89, bulkheads: 152, upper belt: 127, barbettes: 152, turrets: 152, casemates: 152 - 51, deck: 63 - 51, CT: 356 - 76, fwd torpedo room: 152
Armament	2 x 2 - 203/45 Armstrong U, 12 x 1 - 152/40 Armstrong Z, 12 x 1 - 76/40 Armstrong N, 7 x 1 - 47/30 21/2pdr Hotchkiss Mk I, 5 - 450 TT (1 bow, 4 beam)
Complement	700

Standard scale images

Graphics

Project history

Ordered under the Second Naval Expansion Programme of 1896-1897, when Japan turned to a German yard for assistance. (Previously Germany had been closely involved in constructing warships for China, Japan's recent enemy.) The protection of the Yakumo was well designed. A total of 247 watertight compartments were provided, 38 of them being in the double bottom. Although the ship was built in a German yard, the Japanese stipulated that she be armed with British manufactured Elswick guns to ensure ammunition compatibility with all her other major warships.

Ship protection

Main 178mm belt had 68.4m length (inside barbettes) and 2.1m height, closed by 152mm bulkheads abreast barbettes. Its thickness was 89mm outside barbettes. Upper 127mm belt had dimensions 61.6x2.1m. 51mm deck was connected with lower edge of main belt by 76mm slopes. It has turtleback form and 63-51mm thickness outside barbettes. CT had 356mm sides and 76mm roof. All 8`` and 6`` guns and fore torpedo room had 152mm protection (but 4 6`` guns amidships were protected by only 51mm armor).

Modernizations

1924: - 4 x 1 - 76/40, 4 x 1 - 47/30, 3 - 450 TT; + 1 x 1 - 76/40 3-shiki

1927: boilers were replaced by 6 Yarrow (oil- and coal-burning), engine power decreased to 7000hp and maximal speed to 16kts; - 4 x 1 - 152/40, 8 x 1 - 76/40, 3 x 1 - 47/30, 2 - 450 TT

1945: - 2 x 2 - 203/45, 4 x 1 - 152/40; + 2 x 2 - 127/40 89-shiki, 2 x 3 - 25/60 96-shiki, 2 x 2 - 25/60 96-shiki, 2 x 1 - 25/60 96-shiki

Naval service Actively participated in war against Russia in 1904-1905. In September, 1921 Yakumo was reclassified to 1 class coast defence ship but further served as TS. In July, 1942

Actively participated in war against Russia in 1904-1905. In September, 1921 Yakumo was reclassified to 1 class coast defence ship but further served as TS. In July, 1942 Yakumo again became 1st class cruiser, however she did not participate in operations. She was used for repatriation after war and stricken in July 1946. Ship was sold for scrap in June, 1946.



Many thanks to Wolfgang Stöhr for additional information on this page.