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SM ''UB-44'' was a Type UB II submarine or U-boat for the German Imperial Navy ((ドイツ語:Kaiserliche Marine)) during World War I. ''UB-44'' operated in the Mediterranean and disappeared in August 1916. ''UB-44'' was ordered in July 1915 and was laid down at the AG Weser shipyard in Bremen in September. ''UB-44'' was a about in length and displaced between , depending on whether surfaced or submerged. She was equipped to carry a complement of four torpedoes for her two bow torpedo tubes and had an deck gun. As part of a group of six submarines selected for Mediterranean service, ''UB-44'' was broken into railcar sized components and shipped to Pola where she was assembled and launched in April 1916 and commissioned in May. In two patrols in her three-month career, ''UB-44'' sank one ship of . In early August 1916, ''UB-44'' departed from Cattaro for Hersingstand and never arrived. Her fate is officially unknown, but she may have been sunk by a torpedo boat near the island of Paxoi on 8 August. == Design and construction == The German UB II design improved upon the design of the UB I boats, which had been ordered in September 1914.〔Gardiner, p. 174.〕 In service, the UB I boats were found to be too small and too slow. A major problem was that, because they had a single propeller shaft/engine combo, if either component failed, the U-boat became almost totally disabled.〔Miller, p. 48.〕 To rectify this flaw, the UB II boats featured twin propeller shafts and twin engines (one shaft for each engine), which also increased the U-boat's top speed.〔Williamson, p. 13.〕 The new design also included more powerful batteries,〔 larger torpedo tubes, and a deck gun.〔Tarrant, p. 172.〕 As a UB II boat, ''U-47'' could also carry twice the torpedo load of her UB I counterparts, and nearly ten times as much fuel.〔 To contain all of these changes the hull was larger,〔 and the surface and submerged displacement was more than double that of the UB I boats.〔 The Imperial German Navy ordered ''UB-44'' from AG Weser on 31 July 1915 as one of a series of six UB II boats (numbered from to ).〔 ''UB-44'' was long and abeam. She had a single hull with saddle tanks and had a draft of when surfaced. She displaced while submerged but only on the surface.〔 The submarine was equipped with twin diesel engines and twin electric motors—for surfaced and submerged running, respectively—that drove twin propeller shafts. ''UB-44'' had a surface speed of up to and could go as fast as while underwater.〔 The U-boat could carry up to of diesel fuel, giving her a range of at .〔 Her electric motors and batteries provided a range of at 〔 while submerged. ''UB-44'' was equipped with two bow torpedo tubes and could carry four torpedoes. The U-boat was also armed with a 5 cm KL/40 (2.0 in) deck gun. ''UB-44'' was laid down by AG Weser at its Bremen shipyard on 3 September 1915.〔 As one of six U-boats selected for service in the Mediterranean while under construction, ''UB-44'' was broken into railcar-sized components and shipped overland to the Austro-Hungarian port of Pola.〔Halpern, p. 383.〕〔Miller, p. 49.〕 Shipyard workers from Weser assembled the boat and her five sisters at Pola,〔 where she was launched on 20 April 1916.〔 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 UB-44」の詳細全文を読む スポンサード リンク
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