翻訳と辞書 Words near each other ・ Built to Last (Sick of It All album) ・ Built to Last (TV series) ・ Built to Perform ・ Built to Rule ・ Built to Spill ・ Built to Spill Caustic Resin ・ Built up edge ・ Built with Hate ・ Built-in ・ Built-in hold ・ Built-in inflation ・ Built-in self-test ・ Built-in test equipment ・ Built-up area ・ Built-up area (Highway Code) ・ Built-up gun ・ Builth Castle ・ Builth Road railway station ・ Builth Volcanic ・ Builth Wells ・ Builth Wells RFC ・ Builth Wells transmitting station ・ Builth Wells Urban District ・ BuiltWith ・ Builum Khawhlui ・ Builyan, Queensland ・ Buima ・ Buin ・ Buin Airport ・ Buin Rural District Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Built-up gun ： ウィキペディア英語版 Built-up gun A built-up gun is artillery with a specially reinforced barrel. An inner tube of metal which stretches most within its elastic limit enlarges under the pressure of confined powder gases to transmit stress to outer cylinders under tension.〔Fairfield (1921) p.161〕 Concentric metal cylinders or wire windings are assembled to minimize the weight required to resist the pressure of powder gases pushing a projectile out of the barrel. Built-up construction was the norm for guns mounted aboard 20th century Dreadnoughts and contemporary railway guns, coastal artillery, and siege guns through World War II. ==Background== Velocity and range of artillery vary directly with pressure of gunpowder or smokeless powder gasses pushing the shell out of a gun barrel; but a gun will be deformed or explode if chamber pressures strain a gun barrel beyond the elastic limit of the metal from which the barrel is made.〔 Thickness of homogeneous cast metal gun barrels reached a useful limit at approximately one-half caliber. Additional thickness provided little practical benefit, since higher pressures generated cracks from the bore before the outer portion of the cylinder could respond, and those cracks would extend outward during subsequent firings.〔Fairfield (1921) p.160〕 Claverino's 1876 treatise on the "Resistance of Hollow Cylinders" was published in ''Giornale d'Artigliera''.〔Fairfield (1921) p.165〕 The concept was to give exterior portions of the gun initial tension, gradually decreasing toward the interior, while giving interior parts a normal state of compression by the outer cylinders and wire windings.〔Fairfield (1921) pp.161–2〕 Theoretical maximum performance would be achieved if the inner cylinder forming the rifled bore were compressed to its elastic limit by surrounding elements while at rest before firing, and expanded to its elastic limit by internal gas pressure during firing.〔Fairfield (1921) pp.200–201〕 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「Built-up gun」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.