HMS Regent underway
|Preceded by:||Parthian class|
|Succeeded by:||S class|
|General characteristics |
|Displacement:||1,763 long tons (1,791 t) surfaced
2,030 long tons (2,060 t) submerged
|Length:||287 ft (87 m)|
|Beam:||30 ft (9.1 m)|
|Draught:||16 ft (4.9 m)|
2 × Admiralty diesel engines, 4,640 hp (3,460 kW)
2 × electric motors, 1,635 hp (1,219 kW)
|Speed:||17.5 knots (20.1 mph; 32.4 km/h) surfaced
8.6 kn (9.9 mph; 15.9 km/h) submerged
|Armament:||8 × 21 in (533 mm) torpedo tubes (6 bow, 2 stern) with 14 reloads
Design and description
The Rainbow-class submarines were designed as improved versions of the Parthian class and were intended for long-range operations in the Far East. The submarines had a length of 287 feet 2 inches (87.5 m) overall, a beam of 29 feet 10 inches (9.1 m) and a mean draft of 13 feet 10 inches (4.2 m). They displaced 1,772 long tons (1,800 t) on the surface and 2,030 long tons (2,060 t) submerged. The Rainbow-class submarines had a crew of 56 officers and ratings. They had a diving depth of 300 feet (91.4 m).
For surface running, the boats were powered by two 2,200-brake-horsepower (1,641 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 660-horsepower (492 kW) electric motor. They could reach 17.5 knots (32.4 km/h; 20.1 mph) on the surface and 9 knots (17 km/h; 10 mph) underwater. On the surface, the boats had a range of 7,050 nautical miles (13,060 km; 8,110 mi) at 9.2 knots (17.0 km/h; 10.6 mph) and 62 nmi (115 km; 71 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged.
The boats were armed with six 21-inch torpedo tubes in the bow and two more in the stern. They carried six reload torpedoes for a grand total of fourteen torpedoes. They were also armed with a QF 4.7-inch (120 mm) Mark IX deck gun.
Six boats were planned, but economic considerations resulted in the cancellation of the projected boats HMS Royalist and HMS Rupert.
|Rainbow||Chatham Dockyard||14 May 1930||Sunk 4 October 1940 in collision with the Italian merchant ship Antonietta Costa|
|Regent||Vickers, Barrow in Furness||11 June 1930||Sunk 18 April 1943 by mines near Barletta, Apulia, Italy|
|Regulus||Vickers, Barrow in Furness||11 June 1930||Sunk 6 December 1940 by mines near Taranto, Apulia, Italy|
|Rover||Vickers, Barrow in Furness||11 June 1930||Scrapped 1946|
- Conway's All the World's Fighting Ships
- Bagnasco, pp. 106–07
- Chesneau, p. 49
- "HMS Rainbow (N 16)". uboat.net. Retrieved 20 June 2015.
- Akermann, Paul (2002). Encyclopaedia of British Submarines 1901–1955 (reprint of the 1989 ed.). Penzance, Cornwall: Periscope Publishing. ISBN 1-904381-05-7.
- Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-962-6.
- Colledge, J. J.; Warlow, Ben (2006) . Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8. OCLC 67375475.
- Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN 0-85177-146-7.
- McCartney, Innes (2006). British Submarines 1939–1945. New Vanguard 129. Oxford, UK: Osprey. ISBN 1-84603-007-2.