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ROYAL NAVY - UNITED KINGDOM

SUBMARINES

TRITON ("T" prewar programs) submarines (1938 - 1941)

Triton 1940

Name No Builder Laid down Launched Comp Fate
Triton T15 - N15 Vickers-Armstrong, Barrow 8/1936 5/10/1937 11/1938 sunk 18/12/1940
Thunderbolt (ex-Thetis) T11 - N25 Cammell Laird, Birkenhead 12/1936 29/6/1938 10/1940 sunk 14/3/1943
Tribune T76 Scotts, Greenock 3/1937 8/12/1938 10/1939 BU 7/1947
Trident T52 - N52 Cammell Laird, Birkenhead 1/1937 7/12/1938 8/1939 BU 2/1946
Triumph T18 - N18 Vickers-Armstrong, Barrow 3/1937 16/2/1938 5/1939 sunk 14/1/1942
Taku T38 - N38 Cammell Laird, Birkenhead 11/1937 20/5/1939 1/1940 BU 11/1946
Tarpon T17 - N17 Scotts, Greenock 10/1937 17/10/1939 3/1940 sunk 14/4/1940
Thistle T24 - N24 Vickers-Armstrong, Barrow 12/1937 25/10/1939 7/1939 sunk 10/4/1940
Tigris T63 Chatham DYd 5/1938 31/10/1939 6/1940 sunk 10/3/1943
Triad T53 - N53 Vickers-Armstrong, Barrow 3/1938 5/5/1939 9/1939 sunk 15/10/1940
Truant T68 - N68 Vickers-Armstrong, Barrow 3/1938 5/5/1939 10/1939 BU 12/1945
Tuna T94 Scotts, Greenock 6/1938 10/5/1940 8/1940 BU 12/1945
Talisman T78 Cammell Laird, Birkenhead 9/1938 29/1/1940 6/1940 sunk 16/9/1942
Tetrarch T77 - N77 Vickers-Armstrong, Barrow 8/1938 14/11/1939 2/1940 sunk 27/10/1941
Torbay T79 Chatham DYd 11/1938 9/4/1940 1/1941 BU 12/1945

 

Displacement standard, t

Triton: 1095

others:1090

Displacement normal, t

Triton: 1331 / 1585

others: 1326 / 1575

Length, m

Triton: 84.4

others: 83.8

Breadth, m

8.10

Draught, m

4.47 (4.57 maximal)

No of shafts

2

Machinery

2 Vickers diesels / 2 electric motors

Tigris, Torbay: 2 Admiralty diesels / 2 electric motors

Tribune, Tarpon, Tuna: 2 MAN diesels / 2 electric motors

Thunderbolt, Trident, Taku, Talisman: 2 Sulzer diesels / 2 electric motors

Power, h. p.

2500 / 1450

Max speed, kn

15.25 / 9

Talisman, Tetrarch, Torbay: ~14 / 9

Fuel, t

diesel oil 132 (Trident, Torbay from 1942 up to 178)

Endurance, nm(kts)

8000(10) /

Armament

10 - 533 TT (6 bow, 4 ext bow, 16), 1 x 1 - 102/40 QF Mk XII, 3 x 1 - 12.7/62

Talisman, Tetrarch, Torbay: 10 - 533 TT (6 bow, 4 ext bow, 16), 1 x 1 - 102/40 QF Mk XII, 3 x 1 - 12.7/62, 12 - 16 mines

Sensors sonar

Complement

59

Diving depth operational, m 95

Ship project history: In the early thirties in Britain have made a decision about creation of new patrol submarine for replacement of unsuccessful boats of "O", "" and "R" classes. Under decisions of the London conference of 1930, UK could construct the next years submarines with total displacement not more than 16 500t. Proceeding from it displacement of a new submarine have limited by 1000t, that allowed to receive the greatest number of ships inot exceeding limitations.

Design of "" class submarine was approved in 1935. She had saddle-tank construction, fuel tanks were in a pressure hull. Operational diving depth was 95 m. New submarines were on 500t lighter than the predecessors but exceeded them on all parametres (armament, manoeuvrability, diving depth), except for surface speed. Number of TTs have increased at the expense of placing them partly out of a pressure hull: two in special bulb in a fore end and two more aside, in a superstructure abreast CT. Torpedoes from the latter launched fwd that ensured a total 10-torpedoes salvo.

Leadship Triton was built under the 1935 program, later ships on 1936-1938 programs. Last three submarines (Talisman, Tetrarch and Torbay) have welded bulkheads. These boats have equipped with special mine cartridges (on 12-16 mines), arranged in side blisters amidships. Tests have shown, that the similar construction conducts to loss of about 1.5kts and its usage have refused.

Thunderbolt was originally called Thetis, she foundered 1/6/1939 during trials. Submarine was salvaged 23/10/1939, repaired by Cammell Laird and renamed in April 1940.

Modernizations: 1941, Talisman, Tetrarch, Torbay: mine containers (for 12 - 16 mines) were removed, surface speed increased up to 15.25 kts

1941, Thunderbolt, Triumph: - 2 - 533 TT (external) (14 torpedoes totally)

about 1942, Tribune, Trident, Taku, Tigris, Truant, Tuna, Torbay: - 2 - 533 TT (external, bow); + 3 - 533 TT (external, stern) (17 torpedoes totally)

1942, Thunderbolt: + 2 Chariot human torpedoes

about 1942 - 1943, all survived: can carry 18 M2 mines instead of torpedoes

1942 - 1943, all survived: + 1 x 1 - 20/70 Oerlikon Mk II/IV

1/1946, Tribune, Trident, Taku: 1 x 1 - 102/40 S Mk I, 1 x 1 - 20/70 Mk IIA S/M, 11 - 533 TT

Naval service: Tarpon was sunk 14/4/1940 by DCs of German minesweeper 6 in the North Sea. Thistle was sunk 10/4/1940 by German submarine U4 in the North Sea. Triton was lost 18/12/1940 in Southern Adriactic Sea (probable on a mine). Triad was mined mine at Bengasi (probable 13/10/1940). Tetrarch was lost on a mine at Sardinia (possibly 27/10/1941). Triumph was lost 14/1/1942 in Mediterranean sea (possibly on a mine). Talisman was lost 16/9/1942 at Sicily (possibly on a mine). Tigris was sunk 27/2/1943 by German ASW ship UJ2210 in the North Sea. Thunderbolt was sunk by DCs of Italian corvette Cicogna 14/3/1943 in Mediterranean sea.

Ivan Gogin, 2008-15