15 cm/45 41st Year Type

The 15 cm/45 41st Year Type was a British naval gun designed by the Elswick Ordnance Company for export in the years before World War I that armed warships of the Imperial Japanese Navy. These guns served aboard Japanese ships during World War I and as coastal artillery during World War II.

15 cm/45 41st Year Type
TypeNaval gun
Coastal Artillery
Place of originGreat Britain
Service history
In service1906–1945
Used byEmpire of Japan
WarsWorld War I
World War II
Production history
DesignerElswick Ordnance Company
Designed1904
ManufacturerArmstrong Whitworth
Kure Naval Arsenal
Produced1906
Specifications
Mass7.5 t (1,180 st)
Length7 m (23 ft)
Barrel length6.8 m (22 ft 4 in) 45 caliber
ShellSeparate loading bagged charge 22 kg (49 lb) and projectile
Shell weight45.4 kg (100 lb)
Calibre152 mm (6.0 in)
BreechInterrupted screw
Elevation-5° to +18°
Traverse-150° to +150°[1]
Rate of fire5 rpm
Muzzle velocity825 m/s (2,710 ft/s)
Maximum firing range14.8 km (9.2 mi) at 18°[2]

History

The 15 cm/45 41st Year began life as a design produced by the parent company of Elswick, Armstrong Whitworth for export customers and called the Pattern GG. These guns did not serve aboard ships of the Royal Navy. On 5 October 1917 the Japanese designation system for artillery changed from inches 6 in/45 41st Year Type to centimeters 15 cm/45 41st Year Type. Whether the guns originated in Britain or were built in Japan they still shared the same 41st Year designation.[2]

Construction

The 15 cm/45 41st Year was constructed of an A tube and wire wound with a protective outer jacket. Ships built in British shipyards for Japan were armed with Pattern GG guns and later Japan produced their own versions under license at the Kure Naval Arsenal. Four different models were produced at Kure which differed in the style of rifling used. Although sometimes referred to as QF guns, they were actually BL guns which used separate loading bagged charges and projectiles.[2]

15 cm/45 41st Year guns equipped armored cruisers, predreadnought battleships and protected cruisers of the Imperial Japanese Navy.

Armored cruisers:

Predreadnought battleships:

  • Kawachi-class battleships - The two ships of this class had a secondary armament of ten 15 cm/45 41st Year guns in single casemated mounts amidships.[5]
  • Japanese battleship Aki - This ship had a secondary armament of eight 15 cm/45 41st Year guns in single casemated mounts amidships.[6]
  • Japanese battleship Kashima - This ship had a secondary armament of ten EOC Pattern GG guns in single casemated mounts amidships.[7]
  • Japanese battleship Mikasa - This ship had a secondary armament of fourteen 15 cm/45 41st Year guns in single casemated mounts amidships after a 1908 refit.[8]

Protected cruisers:

  • Chikuma-class cruisers - The three ships of this class had a primary armament of six 15 cm/45 41st Year guns. There was one single shielded mount fore and aft, and three shielded mounts per side in sponsons amidships.[9]
  • Japanese cruiser Tsugaru - This ship was the former Pallada of the Imperial Russian Navy sunk and captured at Port Arthur in 1905. The ship was repaired and recommissioned into the Imperial Japanese Navy in 1908 as the Tsugaru. The Pallada's primary armament of eight 152 mm 45 caliber Pattern 1892 guns were replaced with eight 15 cm/45 41st Year guns.[10]

Ammunition

Ammunition was of separate loading bagged charge and projectile. The bagged charges weighed 22 kg (49 lb), while the projectiles weighed 45.4 kg (100 lb).[1]

The gun was able to fire:

  • The IJN armored cruiser Aso.
  • The IJN protected cruiser Hirado.
  • The IJN armored cruiser Ikoma.
  • The IJN battleship Kashima.
  • The IJN battleship Mikasa.
  • The IJN protected cruiser Tsugaru.

References
  • Friedman, Norman (2011). Naval Weapons of World War One. Barnsley, South Yorkshire, UK: Seaforth. ISBN 978-1-84832-100-7.

Notes
  1. DiGiulian, Tony. "Japan 6"/45 (15.2 cm) 41st Year Type - NavWeaps". www.navweaps.com. Retrieved 2017-08-07.
  2. Friedman, Norman (2011). Naval weapons of World War One. S. Yorkshire: Seaforth Pub. ISBN 9781848321007. OCLC 751804655.
  3. "Tsukuba armoured cruisers (1907-1908) - Imperial Japanese Navy (Japan)". www.navypedia.org. Archived from the original on 2016-02-07. Retrieved 2017-08-07.
  4. "Aso armoured cruiser (1903/1908) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-07.
  5. "Settsu battleships (1912) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-07.
  6. "Aki battleship (1911) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-07.
  7. "Kashima battleships (1906) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-08.
  8. "Mikasa battleship (1902) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-08.
  9. "Chikuma light cruisers (1912) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-07.
  10. "Tsugaru protected cruiser (1902 / 1910) - Imperial Japanese Navy (Japan)". www.navypedia.org. Retrieved 2017-08-07.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.