Name HMS C29 Commissioned 17 September 1909 Construction started 4 June 1908 Length 43 m Draft 3.51 m | Laid down 4 June 1908 Launched 19 June 1909 Test depth 30 m | |
Fate Sunk by mine, 29 August 1915 Displacement 290 long tons (290 t) surfaced320 long tons (330 t) submerged Builders Vickers, Barrow-in-Furness | ||
HMS C21 was one of 38 C-class submarines built for the Royal Navy in the first decade of the 20th century.
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Design and description
The C-class boats of the 1907–08 and subsequent Naval Programmes were modified to improve their speed, both above and below the surface. 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 290 long tons (290 t) on the surface and 320 long tons (330 t) submerged. The C-class submarines had a crew of two officers and fourteen ratings.
For surface running, the boats were powered by a single 12-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. They could reach 13 knots (24 km/h; 15 mph) on the surface and 8 knots (15 km/h; 9.2 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).
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.
Construction and career
HMS C29 was built by Vickers, Barrow. She was laid down on 4 June 1908 and was commissioned on 17 September 1909. The boat sank a merchant ship while patrolling the Gulf of Riga in the Baltic.
C29 was involved in the U-boat trap tactic. The tactic was to use a decoy trawler to tow a submarine. When a U-boat was sighted, the tow line and communication line was slipped and the submarine would attack the U-boat. The tactic was partly successful, but was abandoned after the loss of two C-class submarines. In both cases, all the crew were lost. C29 was one of the two C class submarines sunk because of the tactic. She was mined when her trawler Ariadne strayed into a minefield in the Humber Estuary on 29 August 1915.