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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク V-3 cannon ： ウィキペディア英語版 V-3 cannon The V-3 (''Vergeltungswaffe 3'') was a German World War II supergun working on the multi-charge principle whereby secondary propellant charges are fired to add velocity to a projectile. The weapon was planned to be used to bombard London from two large bunkers in the Pas-de-Calais region of northern France, but they were rendered unusable by Allied bombing raids before completion. Two similar guns were used to bombard Luxembourg from December 1944 to February 1945. The V-3 was also known as the ''Hochdruckpumpe'' ("High Pressure Pump," HDP for short), which was a code name intended to hide the real purpose of the project. It was also known as ''Fleißiges Lieschen'' ("Busy Lizzie").〔 (bottom of page)〕 ==Description== The gun used multiple propellant charges placed along the barrel's length and timed to fire as soon as the projectile passed them, to provide an additional boost. Because of their greater suitability and ease of use, solid-fuel rocket boosters were used instead of explosive charges. These were arranged in symmetrical pairs along the length of the barrel, angled to project their thrust against the base of the projectile as it passed. This layout spawned the German codename ''Tausendfüßler'' ("millipede"). Unlike conventional rifled weapons of the day, the smoothbore gun fired a fin-stabilized shell, dependent upon aerodynamic rather than gyroscopic forces to prevent tumbling, which resulted in a lower drag coefficient. 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「V-3 cannon」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.