British and Allied Submarine
Operations in World War II
Vice Admiral Sir Arthur Hezlet KBE CB DSO* DSC

 

 

     
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Particulars of British Submarines 1939

T CLASS

 

ENLARGE

1935 Estimates
Triton Vickers
1938
1936 Estimates
Triumph Vickers 1939
1937 Estimates
Thistle Vickers 1939
BUILDING
1936 Estimates Trident C. Laird 1939
Tribune Scotts 1939
1937 Estimates Truant Vickers 1939
Taku C. Laird 1940
Tarpon Scotts 1940
Tuna Scotts 1940
Tigris Chatham 1940
1938 Estimates Tetrarch Vickers 1940
Talisman C. Laird 1940
Torbay Chatham 1941
         

The basic design of the O, P and R-classes was now over ten old and even that of the S and Narwhal-classes was over five years old. With the re-armament of the country getting into its stride there was a strong case for a new design of patrol submarine to be produced. A patrol submarine capable of operating in the Far East was still required but one that was not too large for European waters. It was decided that reliability was more important than high performance and so the characteristics of the new type were to be no more than those actually achieved by the O, P and R-classes. Above all they were to carry all their fuel internally. It was, however, believed that they must be able to sink large warships which were screened by asdic fitted escorts and so be able to fire from long range. The bow salvo was therefore increased to ten torpedoes.

Dimensions

277' x 26½' x 16'=1312 tons (surface)
                           1579 tons (submerged)

Armament


Six 21" internal bow torpedo tubes.
Four 21" external bow torpedo tubes.
Sixteen 21" Mark VIII torpedoes.
One 4" QF Mark III gun on an S1 mounting. 120 rounds ammo.
Two Lewis guns and five rifles.

Propulsion



Twin diesel engines. 2500 HP = 16.28 knots.
134 tons oil fuel = 4050 miles @ 14 kts or 9550 miles @ 8 kt.
Vickers boats had Vickers engines. C. Laird boats had Sulzer engines.
Scotts boats had MAN engines and Chatham boats had Admiralty engines.

Main motors 1450 HP = 9 knots submerged.
Batteries. 336 cells of 140 tons.

Hull

Saddle tank type.
Diving depth 300 ft.

Complement

4 Officers and 49 men.

Detecting devices

Two 34 foot periscopes.
Type 129 asdic set.

RESET PRINT PREFERENCES TO LANDSCAPE
The Royal Navy Submarine Museum Website