Japanese cruiser Yahagi (1911)
Yahagi in 1916
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| History | |
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 Empire of Japan
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| Name: | Yahagi |
| Namesake: | Yahagi River |
| Ordered: | 1907 Fiscal Year |
| Builder: | Mitsubishi Heavy Industries, Nagasaki, Japan |
| Laid down: | 20 June 1910 |
| Launched: | 3 October 1911 |
| Commissioned: | 27 July 1912 |
| Struck: | 1 April 1940 |
| Fate: | Scrapped, 1947 |
| General characteristics | |
| Class and type: | Chikuma-class protected cruiser |
| Displacement: | 5,040 long tons (5,121 t) |
| Length: | 144.8 m (475 ft 1 in) o/a |
| Beam: | 14.2 m (46 ft 7 in) |
| Draught: | 5.1 m (16 ft 9 in) |
| Propulsion: |
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| Speed: | 26 knots (30 mph; 48 km/h) |
| Range: | 10,000 nmi (19,000 km) at 10 kn (12 mph; 19 km/h) |
| Complement: | 414 |
| Armament: |
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| Armour: |
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Yahagi (矢矧) was the second vessel in the Chikuma class of protected cruisers of the Imperial Japanese Navy. Yahagi had two sister ships, Chikuma and Hirado. She was named after the Yahagi River, which runs through Nagano, Gifu and Aichi prefectures.
The Chikuma-class light cruisers were built as part of the 1907 Naval Expansion Program, based on lessons learned during the Russo-Japanese War. Yahagi was laid down at Mitsubishi Heavy Industries in Nagasaki on 20 June 1910, launched on 3 October 1911 and entered service on 27 July 1912.
Yahagi had a hull with an overall length of 144.8 metres (475 ft) and width of 14.2 metres (47 ft), with a normal displacement of 5040 tons and draft of 5.1 metres (17 ft).
Yahagi was propelled by two Parsons steam turbine engines, with a total capacity of 22,500 shp (16,800 kW), which drove two screws. The engine had 16 Kampon boilers, which exhausted though four tall smokestacks. These newly developed engines gave the ship an incredible (for the time) 27.14-knot (50.26 km/h; 31.23 mph) speed, but problems with material strength in the gears of the new engines created a maintenance nightmare, and Yahagi could seldom live up to her potential.
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