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HMS A13
HMS ''A13'' was an submarine built for the Royal Navy in the first decade of the 20th century. She was the first British submarine not to use a petrol engine. After surviving World War I, she was sold for scrap in 1920.
==Design and description==
''A13'' was a member of the first British class of submarines, although slightly larger, faster and more heavily armed than the lead ship, . The submarine had a length of overall, a beam of and a mean draft of . They displaced on the surface and submerged. The A-class submarines had a crew of 2 officers and 11 ratings.〔Gardiner & Gray, p. 86〕
For surface running, ''A13'' was powered by a single vertical, six-cylinder Hornsby-Akroyd oil engine that drove one propeller shaft. When submerged the propeller was driven by a electric motor. They could reach on the surface and underwater.〔 The heavy oil engine was heavier than the petrol engines used by the other boats in the class and an equal amount of fuel had to be removed, which reduced their range despite the heavy oil engine's more economical consumption. On the surface, the boat had a range of about at ;〔Harrison, Chapters 3 and 25〕 submerged the boat had a range of at .〔Akermann, p. 120〕
The boats were armed with two 18-inch (45 cm) torpedo tubes in the bow. They could carry a pair of reload torpedoes, but generally did not as doing so that they had to compensate for their weight by an equivalent weight of fuel.〔Harrison, Chapter 27〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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