HMS Unrivalled (P45)
HMS Unrivalled entering Grand Harbour, Malta, flying the Jolly Roger flag denoting the sinking of a U boat.
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| History | |
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| Name: | HMS Unrivalled |
| Ordered: | 23 August 1940 |
| Builder: | Vickers Armstrong, Barrow-in-Furness |
| Laid down: | 12 May 1941 |
| Launched: | 16 February 1942 |
| Commissioned: | 3 May 1942 |
| Fate: | Scrapped 22 January 1946 |
| Badge: |
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| General characteristics | |
| Class and type: | U-class submarine |
| Displacement: |
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| Length: | 195 ft 6 in (59.6 m) |
| Beam: | 15 ft 9 in (4.8 m) |
| Draught: | 15 ft 10 in (4.8 m) |
| Propulsion: |
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| Speed: |
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| Endurance: |
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| Test depth: | 200 ft (61 m) |
| Complement: | 33 |
| Armament: |
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HMS Unrivalled (P45) was a U-class submarine built for the Royal Navy during World War II. The boat has been the only ship of the Royal Navy to ever bear the name Unrivalled. Completed in 1942, the boat spent most of the war in the Mediterranean. She sank a number of small merchant ships and naval auxiliaries, but major success eluded her during the war. Too small and slow for the post-war environment, Unrivalled was scrapped in 1946.
HMS Unrivalled was one of the second group of U-class submarines ordered on 23 August 1940. These submarines differed from their predecessors in that they were lengthened by 5 feet (1.5 m) "to give a more streamlined shape aft and to improve the flow of water over the propellers."
The submarine was 195 feet 6 inches (59.6 m) long and 15 feet 9 inches (4.80 m) abeam. Unrivalled had a single hull with internal ballast tanks and had a draft of 15 feet 19 inches (5.05 m) when surfaced. She displaced 735 long tons (747 t) while submerged, but only 648 long tons (658 t) on the surface. The submarine was equipped with two diesel engines and twin General Electric electric motors—for surfaced and submerged running, respectively. They were coupled together with a diesel-electric transmission. Unrivalled had a surface speed of up to 11.25 knots (20.84 km/h; 12.95 mph) and could go as fast as 9 knots (17 km/h; 10 mph) while underwater. The boat could carry up to 55 long tons (56 t) of diesel fuel, giving her a range of 5,000 nautical miles (9,300 km; 5,800 mi) at 10 knots (19 km/h; 12 mph). Her electric motors and batteries provided a range of 120 nautical miles (220 km; 140 mi) at 2 knots (3.7 km/h; 2.3 mph) while submerged.
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