| History | |
|---|---|
 United Kingdom | |
| Name | HMS K9 |
| Builder | Vickers, Barrow-in-Furness |
| Laid down | 28 June 1915 |
| Launched | 8 November 1916 |
| Commissioned | 9 May 1917 |
| Decommissioned | 1921 |
| Fate | Sold, 23 July 1926 |
| General characteristics | |
| Class and type | K-class submarine |
| Displacement |
|
| Length | 339 ft (103 m) |
| Beam | 26 ft 6 in (8.08 m) |
| Draught | 20 ft 11 in (6.38 m) |
| Propulsion |
|
| Speed |
|
| Range |
|
| Complement | 59 (6 officers and 53 ratings) |
| Armament |
|
HMS K9 was a K class submarine built by Vickers, Barrow-in-Furness. K9 was laid down on 28 June 1915. She was commissioned on 9 May 1917. In 1921, K9 was placed in reserve. K9 was sold in Charlestown on 23 July 1926. It had a complement of fifty-nine crew members and a length of 338 feet (103 m).
Like all British K-class submarines, K9 had a displacement of 1,800 long tons (1,800 t) when at the surface and 2,600 long tons (2,600 t) while submerged.[1] It had a total length of 338 feet (103 m), a beam of 26 feet 6 inches (8.08 m), and a draught of 20 ft 11 in (6.38 m).[2] The submarine was powered by two oil-fired Yarrow Shipbuilders boilers and one geared Brown-Curtis or Parsons steam turbine; this developed 10,500 ship horsepower (7,800 kW) to drive two 7 ft 6 in (2.29 m) screws. It also contained four electric motors each producing 350 to 360 horsepower (260 to 270 kW).[2] It was also fitted with a diesel engine providing 800 hp (600 kW) to be used when steam was being raised, or instead of raising steam.[3]
The submarine had a maximum surface speed of 24 kn (44 km/h; 28 mph) and a submerged speed of 9 to 9.5 kn (16.7 to 17.6 km/h).[2][4] It could operate at depths of 150 ft (46 m) at 2 kn (3.7 km/h) for 80 nmi (150 km).[1] K9 was fitted with a 3 inches (76 mm) anti-aircraft gun, ten 18-inch (460 mm) torpedo tubes, and two 4-inch (100 mm) deck guns.[2] Its torpedo tubes were fitted to the bows, the midship section, and two were mounted on the deck.[1] Its complement was fifty-nine crew members.[4]
