HMS E55
HMS "E55" was a British E class submarine built by William Denny, Dumbarton. She was launched on 5 February 1916 and was commissioned in March 1916. "E55" was sold for scrap at Newcastle on 6 September 1922. Design. Like all post-"E8" British E-class submarines, "E55" 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 Vickers eight-cylinder two-stroke diesel engines and two electric motors. 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 . "E55" was capable of operating submerged for five hours when travelling at . "E55" was constructed with a 12-pounder QF gun mounted forward of the conning tower, although this was later removed. 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.