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SM ''U-28'' or ''U-XXVIII'' was a ''U-27'' class U-boat or submarine for the Austro-Hungarian Navy. ''U-28'', built by the Austrian firm of Cantiere Navale Triestino (CNT) at the Pola Navy Yard, was launched in January 1917 and commissioned in June. She had a single hull and was just over in length. She displaced nearly when surfaced and over when submerged. Her two diesel engines moved her at up to on the surface, while her twin electric motors propelled her at up to while underwater. She was armed with two bow torpedo tubes and could carry a load of up to four torpedoes. She was also equipped with a deck gun and a machine gun. During her service career, ''U-28'' sank the British Q ship and nine other ships, sending a combined tonnage of to the bottom. ''U-28'' was surrendered at Venice in 1919, granted to Italy as a war reparation and broken up the following year. == Design and construction == Austria-Hungary's U-boat fleet was largely obsolete at the outbreak of World War I.〔Gardiner, p. 341.〕 The Austro-Hungarian Navy satisfied its most urgent needs by purchasing five Type UB I submarines that comprised the from Germany,〔Gardiner, p. 343.〕 by raising and recommissioning the sunken French submarine ''Curie'' as ,〔〔''Curie'' had been caught in an anti-submarine net while trying to enter the harbor at Pola on 20 December 1914. See: Gardiner, p. 343.〕 and by building four submarines of the that were based on the 1911 Danish ''Havmanden'' class.〔Gardiner, p. 344.〕〔The plans for the Danish ''Havmanden'' class submarines, three of which were built in Austria-Hungary, were seized from Whitehead & Co. in Fiume. See: Gardiner, pp. 344, 354.〕 After these steps alleviated their most urgent needs,〔 the Austro-Hungarian Navy selected the German Type UB II design for its newest submarines in mid 1915.〔Halpern, p. 383.〕 The Germans were reluctant to allocate any of their wartime resources to Austro-Hungarian construction, but were willing to sell plans for up to six of the UB II boats to be constructed under license in Austria-Hungary.〔 The Navy agreed to the proposal and purchased the plans from AG Weser of Bremen.〔Baumgartner and Sieche, as excerpted (here ) (reprinted and translated into English by Sieche). Retrieved 1 December 2008.〕 ''U-28'' displaced surfaced and submerged.〔 She had a single hull with saddle tanks,〔Gardiner, p. 181.〕 and was long with a beam of and a draft of .〔 For propulsion, she had two shafts, twin diesel engines of for surface running, and twin electric motors of for submerged travel. She was capable of while surfaced and while submerged.〔 Although there is no specific notation of a range for ''U-28'' in ''Conway's All the World's Fighting Ships, 1906–1921'', the German UB II boats, upon which the ''U-27'' class was based, had a range of over at surfaced, and at submerged.〔 ''U-27''-class boats were designed for a crew of 23–24.〔 ''U-28'' was armed with two bow torpedo tubes and could carry a complement of four torpedoes. She was also equipped with a 75 mm/26 (3.0 in) deck gun and an machine gun.〔 After intricate political negotiations to allocate production of the class between Austrian and Hungarian firms,〔 ''U-28'' was ordered from Cantiere Navale Triestino (CNT) on 12 October 1915.〔 She was laid down by early 1916 at the Pola Navy Yard,〔By this time, the CNT shipyards at Monfalcone had been overrun by the Italian Army. See: Baumgartner and Sieche, as excerpted (here ) (reprinted and translated into English by Sieche). Retrieved 17 January 2008.〕 and launched on 8 January 1917.〔 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「SM U-28 (Austria-Hungary)」の詳細全文を読む スポンサード リンク
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