HMS D1

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HMS D1 (WWI).jpg
HMS D1
History
Naval Ensign of the United Kingdom.svgUnited Kingdom
NameHMS D1
Builder Vickers Armstrong, Barrow-in-Furness
Laid down14 May 1907
Launched16 May 1908
CommissionedSeptember 1909
FateSunk (as a target) on 23 October 1918
General characteristics
Class and type D-class submarine
DisplacementSurfaced= 483 tons / Submerged= 595 tons
Length163.0 ft (49.7 m) (oa)
Beam13.6 ft (4.1 m) (oa)
Propulsion550 hp electric 1750 hp diesel twin screws
SpeedSurfaced=14.0 kn / Dived= 10.0 (design) 9.0 (service)
RangeSurface= 2500 nmi at 10 kn / Submerged=45 nmi at 5 kn
Complement25
Armament3 × 18 in (45 cm) torpedo tubes (2 bow, 1 stern)

HMS D1 was one of eight D-class submarine built for the Royal Navy during the first decade of the 20th century.

Contents

Description

The D-class submarines were designed as improved and enlarged versions of the preceding C class, with diesel engines replacing the dangerous petrol engines used earlier. The submarines had a length of 163 feet (49.7 m) overall, a beam of 20 feet 6 inches (6.2 m) and a mean draught of 10 feet 5 inches (3.2 m). They displaced 483 long tons (491 t) on the surface and 595 long tons (605 t) submerged. [1] The D-class submarines had a crew of 25 officers and ratings and were the first to adopt saddle tanks. [2]

For surface running, the boats were powered by two 600- brake-horsepower (447 kW) diesels, each driving one propeller shaft. When submerged each propeller was driven by a 275-horsepower (205 kW) electric motor. They could reach 14 knots (26 km/h; 16 mph) on the surface and 9 knots (17 km/h; 10 mph) underwater. On the surface, the D class had a range of 2,500 nautical miles (4,600 km; 2,900 mi) at 10 knots (19 km/h; 12 mph). [2]

The boats were armed with three 18-inch (45 cm) torpedo tubes, two in the bow and one in the stern. They carried one reload for each tube, a total of six torpedoes. [2]

Construction and career

D1 was laid down by Vickers on 14 May 1907 and was launched on 16 May 1908 at Barrow. She was commissioned in September 1909. In 1910, D1 took part in the annual manoevures, during which she "torpedoed" two "Blue Fleet" cruisers off Colonsay. This showed that the D class could operate a considerable distance from their base at Fort Blockhouse.

D1 was sunk as a target on 23 October 1918 near Dartmouth. [3]

Wreck discovery

The wreck was discovered by divers looking for the remains of German U-Boats and has been afforded protected status. [4]

Citations

  1. ↑ Harrison, Chapter 4
  2. 1 2 3 Gardiner & Gray, p. 87
  3. ↑ Historic England. "HMS/m D1 (1472317)". National Heritage List for England . Retrieved 1 May 2021.
  4. ↑ Dartmouth: WW1 submarine wreck given protection at bbc.co.uk. Retrieved 14 May 2021.

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References

50°19′58″N3°29′58″W / 50.33278°N 3.49944°W / 50.33278; -3.49944

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