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FIGHTING SHIPS OF THE WORLD
UNITED KINGDOM
SUBMARINES
THAMES submarines (3, 1932 - 1935)


Photo



Severn 1939

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Thames F71 - N71   Vickers-Armstrong, Barrow 1.1931 26.1.1932 9.1932 sunk 23.7.1940
Severn F57 - N57   Vickers-Armstrong, Barrow 3/1933 16.1.1934 1.1935 BU 7?/1946
Clyde F12 - N12   Vickers-Armstrong, Barrow 5/1933 15.3.1934 4/1935 BU 7.1946


Technical data


Max speed, kts, kn

Thames: 22.5 / 10

others: 22 / 10

Displacement standard, t

Thames: 1830

others: 1850

Displacement normal, t

Thames: 2165 / 2680

others: 2206 / 2723

Length, m

105.2

Breadth, m

8.62

Draught, m

Thames: 4.76

others: 4.85

No of shafts

2

Machinery

2 Admiralty supercharged diesels / 2 electric motors

Power, h. p.

10000 / 2500

Fuel, t

Thames: diesel oil 216 - 224

others: diesel oil 202

Endurance, nm(kts)

6260(12.4) / 115(4)

Armament

Thames: 1 x 1 - 120/45 QF Mk IX, 2 x 1 - 12.7/62, 6 - 533 TT (bow; 12)

others: 1 x 1 - 102/40 QF Mk XII, 2 x 1 - 12.7/62, 6 - 533 TT (bow; 12)

Electronic equipmenttype 120A sonar
Complement

61

Diving depth operational, m60


Standard scale images


<i>Clyde</i> 1939
Clyde 1939


Graphics


<i>Severn</i> 1939
Severn 1939


Project history

Fleet submarines, designed for replacement of out-of-date "K" class. For achievement of the 22kts speed (speed of battleships), special 5000hp diesels were designed. Big size of the latter have compelled to refuse from stern TTs originally provided by the specification. In addition to main diesels 2 more 400hp diesel-generators for battery charging were installed. Double-hulled submarines, operational diving depth was 60m, maximal 95m. Fuel tanks, arranged out of a pressure hull, were welded.

Lead Thames was built under the 1929 Programme. It was originally supposed to built large series of similar ships, however Admiralty had soon refused the concept of fleet submarine and only three were completed instead of 20 planned. Two serial-built boats, Clyde (1931 Programme) and Severn (1932 Programme), differed from the lead ship a little: so, ballast tanks have been taken out in a hull superstructure to improve stability, and there was 102mm gun instead of 120mm.

Modernizations

1935, Thames: - 1 x 1 - 120/45; + 1 x 1 - 102/40 QF Mk XII

1942 - 1943, Severn, Clyde: + 1 x 1 - 20/70 Oerlikon Mk II/IV, they also received ability to carry 12 M2 mines instead of torpedoes, + type 286W or type 291W radar

1/1946, Severn, Clyde: 1 x 1 - 102/40 S Mk I, 1 x 1 - 20/70 Mk IIA S/M, 6 - 533 TT, type 286W or type 291W radar, type 120A sonar

Naval service

Thames was lost on a mine off Norwegian coast 3.8.1940.