HMS Ace (P414)

Last updated

History
Naval ensign of the United Kingdom.svgUnited Kingdom
NameAce
Builder Devonport Dockyard
Laid down3 November 1943
Launched14 March 1945
Identification Pennant number: P414
FateScrapped in June 1950
General characteristics if completed
Class & type Amphion-class submarine
Displacement1,385/1,620 tons (surfaced/submerged)
Length279 ft 3 in (85.12 m) oa
Beam22 ft 3 in (6.78 m)
Draught17 ft 1 in (5.21 m)
Depth500 ft (150 m)
Installed power
  • 3,400  bhp (2,500  kW) diesel
  • 1,250  shp (930  kW) electric
Propulsion
  • 2 × Admiralty 6-cylinder diesel engine
  • 2 × electric motors for submergence driving two shafts
Speed
  • 17.5 kn (32.4 km/h; 20.1 mph) surfaced
  • 7 kn (13 km/h; 8.1 mph) submerged
Range10,500 nmi (19,400 km; 12,100 mi) at 11 kn (20 km/h; 13 mph) surfaced
Test depth600 ft (180 m)
Capacity
  • 165 tons of fuel normal
  • 219 tons of fuel max
Complement6 officers and 55 sailors
Armament

HMS Ace (P414) was an Amphion-class submarine of the Royal Navy laid down on 3 December 1943 and launched at Devonport Dockyard on 14 March 1945 during the Second World War. [1] She was not completed because of the end of the war. However, her hull was used for explosives testing before she was sent in June 1950 to Smith & Houston of Port Glasgow, Scotland to be broken up. [1] [2]

Contents

Construction

The Amphion-class or A class submarines were designed after the T-class submarines. They were designed to serve in the Pacific campaign, but most of them weren't completed before fighting ended. The Amphion-class submarines displaced 1385 tons surfaced and 1620 tons submerged. Their surface speed was 18.5 knots (34.3 km/h; 21.3 mph), and their submerged speed was 8 knots (15 km/h; 9.2 mph). The submarines were powered by diesel electric propulsion and two shafts. The onboard crew strength was 6 officers and 55 sailors. The submarines had ten 21 in (530 mm) torpedo tubes and carried a total of 20 torpedoes. There were four torpedo tubes on the bow, two on the bow exterior, two on the stern and two on the stern exterior. There were three 0.303 machine guns and one Oerlikon 20mm cannon as the anti-aircraft guns. [3] The main deck gun was the QF 4-inch Mk XXII. [4]

Ace was used as a target ship after World War II ended in 1945. Ace was fitted with 6-cylinder Admiralty engines because 8-cylinder engines weren't available. This reduced their speed by 1 knots and their power to 3,400  bhp (2,500  kW ). [4] Ace had 2 electric motors which produced 1,200  shp (890  kW ). Ace was 279 feet 3 inches (85.12 m) long overall, had a beam of 22 feet 3 inches (6.78 m) and a draught of 17 feet 3 inches (5.26 m). The ship could carry 165 tons of fuel as a normal load and 219 tons of fuel as its maximum load. [5] 60 tons were stored in internal tanks and 100 tons in external tanks, an extra 54 tons could be stored in the main tanks. Ace had a tinplated, circular-welded pressure hull, almost equivalent to a double hull. This allowed the ship to dive to a maximum operstional depth of 500 feet (150 m) and a test depth of 600 feet (180 m), though they would be moderately damaged below 200–300 feet (61–91 m). [4]

References

  1. 1 2 Helgason, Guðmundur. "HMS Ace". uboat.net. Retrieved 8 November 2019.
  2. Lenton, H. T. (4 October 1972). British Submarines. London: MacDonald. p. 118. ISBN   035603612X.
  3. Helgason, Guðmundur. "A class Submarines - Allied Warships of WWII". uboat.net. Retrieved 19 July 2025.
  4. 1 2 3 Campbell 1980, p. 55.
  5. Campbell 1980, p. 54.

Bibliography