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・ Blachea longicaudalis
・ Blacher
・ Blachernae
・ Blachernitissa
・ Blachford
・ BL 7.2-inch howitzer
・ BL 7.5 inch Mk VI naval gun
・ BL 7.5-inch Mk I naval gun
・ BL 7.5-inch Mk II – V naval gun
・ BL 7.5-inch naval howitzer
・ BL 8 inch Mk I – VII naval gun
・ BL 8 inch Mk VIII naval gun
・ BL 8-inch howitzer
・ BL 8-inch howitzer Mk I–V
・ BL 8-inch howitzer Mk VI – VIII
BL 9.2 inch gun Mk IX–X
・ BL 9.2 inch gun Mk I–VII
・ BL 9.2 inch Mk XI naval gun
・ BL 9.2 inch naval gun Mk VIII
・ BL 9.2-inch howitzer
・ BL 9.2-inch Railway Gun
・ BL Boötis
・ BL Crucis
・ BL Herculis variable
・ BL Lac
・ BL Lac object
・ BL Lacerta
・ BL Lacertae
・ BL Mark X
・ BL O-Series engine


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BL 9.2 inch gun Mk IX–X : ウィキペディア英語版
BL 9.2 inch gun Mk IX–X

The BL 9.2 inch guns Mk IX and Mk X〔Mk IX = Mark 9, Mk X = Mark 10. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II. Hence these were the ninth and tenth models of BL 9.2 inch gun.〕 were British breech loading 9.2 inch guns of 46.7 calibre, in service from 1899 to the 1950s as naval and coast defence guns. They had possibly the longest, most varied and successful service history of any British heavy ordnance.
==History==
These guns succeeded the 9.2 inch Mk VIII and increased the bore length from 40 to 46.7 calibres, increasing the muzzle velocity from to .
The Mk IX was designed as a coast defence gun, with a three-motion breech. Only fourteen were built and the Mk X, introduced in 1900, incorporated a single-motion breech and changed rifling, succeeded them. As coastal artillery, the Mk X remained in service in Britain until 1956, and in Portugal until 1998. 284 of the Mark X version were built by Vickers, of which 28 examples are known to survive today, all except one fitted on barbette mounts. One in Cape Town is on a disappearing mount.
The 9.2 inch Mk XI gun introduced in 1908 increased the bore length to 50 calibres in an attempt to increase the velocity still further, but proved unsuccessful in service and was phased out by 1920. The Mk X was hence the final Mark of 9.2 inch guns in British Commonwealth service.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「BL 9.2 inch gun Mk IX–X」の詳細全文を読む



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