Rainbow-class submarine

	HMS Regent underway
Class overview
Name	Rainbow class
Operators	Royal Navy
Preceded by	Parthian class
Succeeded by	S class
In commission	1930–1946
Planned	6
Completed	4
Cancelled	2
Lost	3
Retired	1
General characteristics
Type	Submarine
Displacement	1,763 long tons (1,791 t) surfaced; 2,030 long tons (2,063 t) submerged;
Length	287 ft (87 m)
Beam	30 ft (9.1 m)
Draught	16 ft (4.9 m)
Propulsion	Diesel-electric; 2 × Admiralty diesel engines, 4,640 hp (3,460 kW); 2 × electric motors, 1,635 hp (1,219 kW); 2 shafts;
Speed	17.5 knots (20.1 mph; 32.4 km/h) surfaced; 8.6 kn (9.9 mph; 15.9 km/h) submerged;
Complement	53
Armament	8 × 21 inch (533 mm) torpedo tubes (6 bow, 2 stern) with 14 reloads; 1 × QF 4.7-inch (120 mm) Mark IX deck gun; After 1942 :; 2 × 20 mm cannon; Equipped to lay mines through torpedo tubes;

The Rainbow-class submarine or R class was a quartet of patrol submarines built for the Royal Navy in the early 1930s.

Class overview
HMS Regent underway
Name	Rainbow class
Operators	Royal Navy
Preceded by	Parthian class
Succeeded by	S class
In commission	1930–1946
Planned	6
Completed	4
Cancelled	2
Lost	3
Retired	1
General characteristics ^[1]
Type	Submarine
Displacement	1,763 long tons (1,791 t) surfaced 2,030 long tons (2,063 t) submerged
Length	287 ft (87 m)
Beam	30 ft (9.1 m)
Draught	16 ft (4.9 m)
Propulsion	Diesel-electric 2 × Admiralty diesel engines, 4,640 hp (3,460 kW) 2 × electric motors, 1,635 hp (1,219 kW) 2 shafts
Speed	17.5 knots (20.1 mph; 32.4 km/h) surfaced 8.6 kn (9.9 mph; 15.9 km/h) submerged
Complement	53
Armament	8 × 21 inch (533 mm) torpedo tubes (6 bow, 2 stern) with 14 reloads 1 × QF 4.7-inch (120 mm) Mark IX deck gun After 1942 : 2 × 20 mm cannon Equipped to lay mines through torpedo tubes