HMS H8

HMS H8 was a British H-class submarine built by the Canadian Vickers Co., Montreal. She was laid down on 19 May 1915 and commissioned in June 1915. Like other Canadian-built submarines, she was sailed across the Atlantic for service in the North Sea and as recognition of this she initially remained under the command of her Canadian captain, Lieutenant-Commander B. L. Johnson, R.N.R. with a largely reserve crew. HMS H8 was sold on 29 November 1921 in Arbroath.

HMS H4, another submarine of the same class
History
United Kingdom
NameHMS H8
BuilderCanadian Vickers, Montreal
Laid down19 May 1915
CommissionedJune 1915
FateSold, 29 November 1921
General characteristics
Class and typeH-class submarine
Displacement
  • 364 long tons (370 t) surfaced
  • 434 long tons (441 t) submerged
Length150 ft 3 in (45.80 m)
Beam15 ft 4 in (4.67 m)
Propulsion
Speed
  • 13 knots (24 km/h; 15 mph) surfaced
  • 10 knots (19 km/h; 12 mph) submerged
Range
  • 1,600 nmi (3,000 km) at 10 kn (19 km/h; 12 mph) surfaced
  • 130 nmi (240 km) at 2 kn (3.7 km/h; 2.3 mph) submerged
Complement22
Armament

Design

Like all pre-H11 British H-class submarines, H8 had a displacement of 364 long tons (370 t) at the surface and 434 long tons (441 t) while submerged.[1] It had a total length of 150 feet 3 inches (45.8 m), a beam of 15 feet 4 inches (4.67 m), and a draught of 12 feet (3.7 m).[2] 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.[2] 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).[3]

The submarine had a maximum surface speed of 13 knots (24 km/h; 15 mph) and a submerged speed of 11 knots (20 km/h; 13 mph). British H-class submarines had ranges of 1,600 nautical miles (3,000 km; 1,800 mi) at speeds of 10 knots (19 km/h; 12 mph).[1] H8 was fitted with a 6 pounds (2.7 kg) Hotchkiss quick-firing gun (6-pounder) and four 18 inches (460 mm) torpedo tubes. Its torpedo tubes were fitted to the bows and the submarine was loaded with eight 18 inches (460 mm) torpedoes.[1] It is a Holland 602 type submarine but was designed to meet Royal Navy specifications. Its complement was twenty-two crew members.[1]

References
  1. "H-class". Battleships-Cruisers, Cranston Fine Arts. Retrieved 20 August 2015.
  2. 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.
  3. 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
  • Robert Hutchinson. Submarines, War Beneath The Waves, From 1776 To The Present Day.
  • William Guy Carr. By Guess and by God.
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