Clyde 1939
| Name | 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 |
|
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 |
|
Max speed, kn |
Thames: 22.5 / 10 others: 22 / 10 |
|
Fuel, t |
Thames: diesel oil 216 - 224 others: diesel oil 202 |
|
Endurance, nm(kts) |
6260(12.4) / 115(4) |
|
Armament |
Thames: 6 - 533 TT (bow; 12), 1 x 1 - 120/45 QF Mk IX, 2 x 1 - 12.7/62 others: 6 - 533 TT (bow; 12), 1 x 1 - 102/40 QF Mk XII, 2 x 1 - 12.7/62 |
| Sensors | sonar |
|
Complement |
61 |
| Diving depth operational, m | 60 |
Ship project history: Fleet submarines, were designed for replacement of out-of-date "K" class boats. For achievement of the high speed defined by the task at level 22kts (speed of battleships), special 5000hp diesels were designed. Big size of latter have compelled to refuse from stern TTs originally provided by the specification. In addition to main diesels 2 more 400hp diesels 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 program of 1929. It was originally supposed to built large series of similar ships, however Admiralty had soon refused the concept of fleet submarine and instead of 20 planed has put it was limited only to three. Two serial boats, Clyde (1931 program) and Severn (1932), differed from lead ship a little: so, ballast tanks have been taken out in a hull superstructure to improve stability, and instead of 120mm there was 102mm gun.
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, they also received ability to carry 12 M2 mines instead of torpedoes.
Naval service: Thames was lost on a mine at coast of Norway 3/8/1940.
Severn 1939
© Ivan Gogin, 2008-10