River-class submarine


The River class, or Thames class, were a class of submarines built for the Royal Navy. Operating during the Second World War, the three boats of the class comprised, and. All the submarines were named after rivers in the United Kingdom. One was lost during the war and the rest taken out of service following it.

Design

The River class was the last attempt by the Admiralty to produce "fleet submarines", submarines fast enough to operate as part of a fleet, which at the time meant being able to manage somewhere around while surfaced. The previous attempts had been the steam powered K-class submarines and the large gunned M-class submarines. The M class were K-class hulls re-engined with diesels and modified to take a single naval gun directly forward of the conning tower.
A design was drawn up in the late 1920s and three vessels were built by Vickers in Barrow: Thames in 1932, and Severn and Clyde in 1935. The latter two were a little larger than Thames. Initially 20 were planned but changes in thinking and cost limited the building to just the three.
The design compromised on diving depth to keep weight down and speed up. They had a safe diving depth of some compared to the before them which had managed. They were powered by two diesel engines delivering. Two Ricardo engines drove generators that supercharged the diesels up to. This gave them a surface speed of.

Operational history

During the Second World War they initially operated in the North Sea and Mediterranean.
Thames was lost off Norway on 23 September 1940. Clyde was used to deliver supplies to the besieged island of Malta in September 1941. Severn and Clyde were in service in the Far East when they were taken out of service in mid to late 1945.

Boats

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