HMS Seawolf (47S)

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NameSeawolf
Ordered15 March 1934
Laid down25 May 1934
Seawolf on the surface
History
United Kingdom
NameSeawolf
Ordered15 March 1934
BuilderScotts, Greenock
Laid down25 May 1934
Launched28 November 1935
Commissioned12 March 1936
IdentificationPennant number 47S
FateSold for scrap, November 1945
Badge
General characteristics
Class & typeS-class submarine
Displacement
  • 768 long tons (780 t) surfaced
  • 960 long tons (980 t) submerged
Length208 ft 8 in (63.6 m)
Beam24 ft (7.3 m)
Draught11 ft 10 in (3.6 m)
Installed power
  • 1,550 bhp (1,160 kW) (diesel)
  • 1,300 hp (970 kW) (electric)
Propulsion
Speed
  • 13.75 knots (25.47 km/h; 15.82 mph) surfaced
  • 10 knots (19 km/h; 12 mph) submerged
Range6,000 nmi (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph) surface; 64 nmi (119 km; 74 mi) at 2 knots (3.7 km/h; 2.3 mph) submerged
Test depth300 feet (91.4 m)
Complement40
Armament

HMS Seawolf was a second-batch S-class submarine built during the 1930s for the Royal Navy. Completed in 1936, the boat fought in the Second World War.

The second batch of S-class submarines were designed as slightly improved and enlarged versions of the earlier boats of the class and were intended to operate in the North and Baltic Seas.[1] The submarines had a length of 208 feet 8 inches (63.6 m) overall, a beam of 24 feet (7.3 m) and a mean draught of 11 feet 10 inches (3.6 m). They displaced 768 long tons (780 t) on the surface and 960 long tons (980 t) submerged.[2] The S-class submarines had a crew of 40 officers and ratings. They had a diving depth of 300 feet (91.4 m).[3]

For surface running, the boats were powered by two 775-brake-horsepower (578 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 650-horsepower (485 kW) electric motor. They could reach 13.75 knots (25.47 km/h; 15.82 mph) on the surface and 10 knots (19 km/h; 12 mph) underwater.[4] On the surface, the second-batch boats had a range of 6,000 nautical miles (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph) and 64 nmi (119 km; 74 mi) at 2 knots (3.7 km/h; 2.3 mph) submerged.[3]

The S-class boats were armed with six 21-inch (533 mm) torpedo tubes in the bow. They carried six reload torpedoes for a total of a dozen torpedoes. They were also armed with a 3-inch (76 mm) deck gun.[2]

Construction and career

Ordered on 15 March 1934, Seawolf was laid down on 25 May 1934 in Scotts Shipbuilding & Engineering's shipyard in Greenock and was launched on 28 November 1935. The boat was completed on 12 March 1936.[5]

Wartime career

Citations

References

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