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HMS ''E4'' was a British E class submarine built by Vickers, Barrow-in-Furness, costing £101,900. ''E4'' was laid down on 16 May 1911, launched on 5 February 1912 and commissioned on 28 January 1913. On 24 September 1915 ''E4'' was attacked by the German airship SL3. On 15 August 1916, she collided with sister ship during exercises off Harwich. Both ships sank and there were only 14 survivors, all from ''E41''. Both boats were raised, repaired and recommissioned. She was sold on 21 February 1922 to the Upnor Ship Breaking Company. ==Design== Like the first eight British E-class submarines, ''E4'' has a displacement of at the surface and while submerged. It had a total length of and a beam length of . It contained two diesel engines each providing a power of and two electric motors each providing power.〔(【引用サイトリンク】title=E Class )〕 Its complement was thirty-one crew members.〔 The submarine had a maximum surface speed of and a submerged speed of . British E-class submarines had fuel capacities of of diesel and ranges of when travelling at .〔 ''E4'' was capable of operating submerged for five hours when travelling at . It was fitted with a quick-firing gun and four torpedo tubes. One torpedo tube was fitted at the front, one on the aft, and two in the midship section (the transverse area of the amidships); the two in the midship section were removed in post-''E8'' submarines.〔 E-Class submarines contained wireless systems with power ratings; in some submarines, these were later upgraded to systems by removing a midship torpedo tube. Its claimed highest dive depth was although it was capable of reaching depths of below . Some submarines contained Fessenden oscillator systems.〔 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「HMS E4」の詳細全文を読む スポンサード リンク
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