HMS E56
HMS E56 was a British E-class submarine built by William Denny, Dumbarton as Yard No.1033. She was laid down on 1 December 1914, launched 19 June 1916 and was delivered on 8 August 1916. E56 was sold for scrap at Granton, Edinburgh, on 9 June 1923. Design
Like all post-E8 British E-class submarines, E56 had a displacement of  at the surface and  while submerged. She had a total length of  and a beam of . She was powered by two  eight-cylinder two-stroke diesel engines and two  electric motors made by Crossley. 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 . E56 was capable of operating submerged for five hours when travelling at . E56 was armed with a 12-pounder  QF gun mounted forward of the conning tower. She had five 18 inch (450 mm) torpedo tubes, two in the bow, one either side amidships, and one in the stern; a total of 10 torpedoes were carried. E-Class submarines had wireless systems with  power ratings; in some submarines, these were later upgraded to  systems by removing a midship torpedo tube. Their maximum design depth was  although in service some reached depths of below . Some submarines contained Fessenden oscillator systems. References

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British E-class submarines of the Royal Navy
Ships built on the River Clyde
1916 ships
World War I submarines of the United Kingdom
Royal Navy ship names