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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 Unrotated projectile ： ウィキペディア英語版 Unrotated projectile The unrotated projectile, or UP, was a short range rocket-firing anti-aircraft weapon developed for the Royal Navy to supplement the 2 pounder pom-pom gun due to a lack of close-range anti-aircraft weapons. It was used extensively by British ships during the early days of World War II. The UP was also used in ground-based single and 128-round launchers known as "Z batteries". == Operation == The name "unrotated projectile" comes from the fact that the projectile was not spin-stabilized. The weapon had 20 smoothbore tubes, fired ten at a time. A small cordite charge was used to ignite a rocket motor which propelled the fin-stabilized diameter rocket out of the tube to a distance of about , where it exploded and released an mine attached to three parachutes by of wire. The idea was that an aeroplane hitting the wire would draw the mine towards itself where it would detonate. 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「Unrotated projectile」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.