HMS C7

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HMS C38.jpg
HMS C38 - a typical C-class submarine
History
Naval Ensign of the United Kingdom.svgUnited Kingdom
NameHMS C7
Builder Vickers, Barrow
Laid down9 December 1905
Launched15 February 1907
Commissioned23 May 1907
FateSold for scrapping, 20 December 1919
General characteristics
Class and type C-class submarine
Displacement
  • 287 long tons (292 t) surfaced
  • 316 long tons (321 t) submerged
Length142 ft 3 in (43.4 m)
Beam13 ft 7 in (4.1 m)
Draught11 ft 6 in (3.5 m)
Installed power
  • 600  bhp (450 kW) petrol
  • 300 hp (220 kW) electric
Propulsion
Speed
  • 12  kn (22 km/h; 14 mph) surfaced
  • 7 kn (13 km/h; 8.1 mph) submerged
Range910  nmi (1,690 km; 1,050 mi) at 12 kn (22 km/h; 14 mph) on the surface
Test depth100 feet (30.5 m)
Complement2 officers and 14 ratings
Armament2 × 18 in (450 mm) bow torpedo tubes

HMS C7 was one of 38 C-class submarines built for the Royal Navy in the first decade of the 20th century. The boat survived the First World War and was sold for scrap in 1920.

Contents

Design and description

The C class was essentially a repeat of the preceding B class, albeit with better performance underwater. The submarine had a length of 142 feet 3 inches (43.4 m) overall, a beam of 13 feet 7 inches (4.1 m) and a mean draft of 11 feet 6 inches (3.5 m). They displaced 287 long tons (292 t) on the surface and 316 long tons (321 t) submerged. The C-class submarines had a crew of two officers and fourteen ratings. [1]

For surface running, the boats were powered by a single 16-cylinder 600- brake-horsepower (447 kW) Vickers petrol engine that drove one propeller shaft. When submerged the propeller was driven by a 300-horsepower (224 kW) electric motor. [1] They could reach 12 knots (22 km/h; 14 mph) on the surface and 7 knots (13 km/h; 8.1 mph) underwater. On the surface, the C class had a range of 910 nautical miles (1,690 km; 1,050 mi) at 12 knots (22 km/h; 14 mph). [2]

The boats were armed with two 18-inch (45 cm) torpedo tubes in the bow. They could carry a pair of reload torpedoes, but generally did not as they would have to remove an equal weight of fuel in compensation. [3]

Construction and career

C7 was built by Vickers at their Barrow-in-Furness shipyard, laid down on 9 December 1905 and was commissioned on 23 May 1907. The boat is often mistakenly credited with sinking UC-68 on 5 April 1917 off the coast of The Netherlands. However, this attack was made against UB-10, which survived. [4] C7 was sold on 20 December 1919.

Notes

  1. 1 2 Gardiner & Gray, p. 87
  2. ↑ Harrison, Chapter 3
  3. ↑ Harrison, Chapter 27
  4. ↑ McCartney, Innes (2002). Lost Patrols: Submarine Wrecks of the English Channel. Periscope Publishing Ltd. p. 60. ISBN   1904381049

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References

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