HMS H51

HMS H51 was a British H class submarine built by HM Dockyard, Pembroke Dock. She was laid down on an unknown date, launched on 15 November 1918[1] and commissioned into the British Royal Navy on 1 September 1919. It had a complement of twenty-two crew members.

History
United Kingdom
NameHMS H51
BuilderHM Dockyard, Pembroke Dock
Launched15 November 1918
Commissioned1 September 1919
FateSold for scrapping, 6 June 1924
General characteristics
Class and typeH class submarine
Displacement
  • 423 long tons (430 t) surfaced
  • 510 long tons (518 t) submerged
Length171 ft 0 in (52.12 m)
Beam15 ft 4 in (4.67 m)
Propulsion
Speed
  • 11.5 knots (21.3 km/h; 13.2 mph) surfaced
  • 9 knots (17 km/h; 10 mph) submerged
Range
  • 2,985 nmi (5,528 km) at 7.5 kn (13.9 km/h; 8.6 mph) surfaced
  • 130 nmi (240 km) at 2 kn (3.7 km/h; 2.3 mph) submerged
Complement22
Armament

HMS H51 was sold for scrapping on 6 June 1924 and was then resold on 17 July 1924 to the ship breakers.

Design

Like all post-H20 British H-class submarines, H51 had a displacement of 423 long tons (430 t) at the surface and 510 long tons (520 t) while submerged.[2] It had a total length of 171 feet (52 m),[3] a beam of 15 feet 4 inches (4.67 m), and a draught of 12 metres (39 ft).[4] It contained a diesel engines providing a total power of 480 horsepower (360 kW) and two electric motors each providing 320 horsepower (240 kW) power.[4] The use of its electric motors made the submarine travel at 11 knots (20 km/h; 13 mph). It would normally carry 16.4 long tons (16.7 t) of fuel and had a maximum capacity of 18 long tons (18 t).[5]

The submarine had a maximum surface speed of 13 knots (24 km/h; 15 mph) and a submerged speed of 10.5 knots (19.4 km/h; 12.1 mph). Post-H20 British H-class submarines had ranges of 2,985 nautical miles (5,528 km; 3,435 mi) at speeds of 7.5 knots (13.9 km/h; 8.6 mph) when surfaced.[2][4] H51 was fitted with an anti-aircraft gun and four 21 inches (530 mm) torpedo tubes. Its torpedo tubes were fitted to the bows and the submarine was loaded with eight 21 inches (530 mm) torpedoes.[2] It is a Holland 602 type submarine but was designed to meet Royal Navy specifications. Its complement was twenty-two crew members.[2]

References
  1. Carradice, Phil (2013). The ships of Pembroke Dockyard. Gloucestershire: Amberley. ISBN 978-1445612904.
  2. Gardiner, Robert; Gray, Robert (1985). Conway's All the World's Fighting Ships 1906-1921. London: Conway Maritime Press. p. 92. ISBN 0-85177-245-5.
  3. Derek Walters (2004). The History of the British 'U' Class Submarine. Casemate Publishers. pp. 2–. ISBN 978-1-84415-131-8.
  4. Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8. Retrieved from Naval-History on 20 August 2015.
  5. J. D. Perkins (1999). "Building History and Technical Details for Canadian CC-Boats and the Original H-CLASS". Electric Boat Company Holland Patent Submarines. Retrieved 20 August 2015.

Bibliography
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