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River Class, British Submarines


Photograph of a River-class submarine

Imperial War Museum. Via Wikimedia Commons


Specifications:


Tonnage

2165 tons surfaced
 2680 tons submerged

Dimensions

344'10" by 28'2" by 15'9"
105.1m by 8.6m by 4.8m

Maximum speed      

22.25 knots surfaced
10 knots submerged

Dive to 200 feet
to 60 meters

Complement

61

Armament

6 21" torpedo tubes (14 torpedoes or 12 mines)
1 4"/40 gun
2 0.303 Lewis machine guns
Machinery
2-shaft diesel (10,000 hp) or electric (2500 hp)
Bunkerage 202 tons diesel oil

Range

6260  nautical miles (11,600 km) at 12.4 knots surfaced
19,900 nautical miles (36,900 km) at 5 knots surfaced
115 nautical miles (210 km) at 4 knots submerged

The Rivers were built in 1931-1935. They were the closest thing to a successful fleet submarine design produced by the British Navy, and had excellent surface speed and a less miserable range than most British submarines. Two units were transferred to the Far East. Because their design sacrificed so much for speed, they were relatively unmaneuverable and tended to leak diesel fuel from the tanks located between their pressure and outer hulls. However, they had a relatively large cargo capacity, which allowed them to be used as supply submarines in the Mediterranean. They were probably the most successful prewar British design.


Units in the Pacific:

Severn    
Arrived 1944     
Never used operationally due to her poor state of repair on arrival
Clyde   
Arrived 1944

References

Bagnasco (1977)

McCartney (2006)

Uboat.net (accessed 2010-1-16)



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