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HMS ''E40'' was a British E class submarine launched by Palmer, Jarrow in 1916 and was completed by Armstrong Whitworth, Newcastle upon Tyne. She was laid down on 9 November 1916 and was commissioned in May 1917. During her World War I service while patrolling Scandinavian waters ''E40'' encountered a U-boat. As the submarine dived the captain was hit with shrapnel and had to be dragged in; the hatch stuck and the vessel took on water, going straight to the bottom. After an hour the air was poor; with the captain unconscious, the first lieutenant asked the crew if he could use the remaining oxygen to try to raise the submarine. This succeeded and the ''E40'' managed to get back to Middlesbrough where it had been posted missing, presumed sunk. The captain survived. HMS ''E40'' was sold on 14 December 1921. ==Design== Like all post-''E8'' British E-class submarines, ''E40'' had 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 .〔 ''E40'' was capable of operating submerged for five hours when travelling at . It was fitted with a quick-firing gun gun (12 pounder), five torpedo tubes, and one spare torpedo tube. Its torpedo tubes were fitted at the front and the aft; unlike pre-''E9'' submarines, the two midship section torpedo tubes were not included.〔 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 E40」の詳細全文を読む スポンサード リンク
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