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42-line fortress and siege gun Pattern of 1877 : ウィキペディア英語版 | 42-line fortress and siege gun Pattern of 1877
42-line siege gun M1877 ((ロシア語:42-линейная пушка образца 1877 года)) was a siege gun used by the Russian Imperial Army in late 19th and early 20th centuries. The word "line" in the designation refers to a measurement unit which equals 0.1 inch. Curiously, the "model year" was not the year when the weapon was designed or standardized, but the year when a new rifling system was adopted. ==History==
The gun was initially developed by the German arms manufacturer Krupp and was based on an earlier 105 mm piece and would have a typical Krupp horizontal sliding wedge breech block.〔(【引用サイトリンク】title=Website about a 42-line siege gun M1877 )〕 The 105 mm weapon was demonstrated to a group of Russian Army officers along with a 120 mm design. The delegation liked the 105 mm weapon, but wanted Krupp to change the caliber to a traditional Russian caliber of "42 lines" (106.7 mm). Later the weapon entered production in Russia; it remained in production until 1903. The 42-line siege gun M1877 could fire high explosive (HE) or shrapnel shells of 15.6 kg (34.3 lbs) weight at a distance of 9.6 km (6 miles).〔(【引用サイトリンク】title=JAEGER PLATOON: FINNISH ARMY 1918 - 1945 WEBSITE. ARTILLERY PART 1: Russian guns without recoil system )〕〔(【引用サイトリンク】title=Allied Artillery of World War One )〕 Notice in the image on right top of page the equipment around wheels used to reduce recoil.
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