Problems With The K-class
Retired Rear-Admiral S.S. Hall wrote in The Times (24 January 1921, p. 10): "...it may be taken as certain that the loss of the vessel was due to some delay to checking the downward momentum gained by the vessel being overtrimmed in diving, either by admitting compressed air too slowly to too many tanks at one time, to tanks only partially full, or to a sea connexion being closed prematurely."
The waters where the battle exercises were taking place were so deep that the vessel would have been crushed, losing control due to the intake of water. Admiral Hall wrote that it was "not clear why the 'K' class should be taken for cruises in the Atlantic in winter." He describes the submarines as 'freaks' that were designed especially for the conditions of the North Sea during World War I. "The high surface speed necessitates great length, and the further complication of steam demands very large openings for funnels and air intakes to boiler rooms. These have always been a source of great anxiety in bad weather or in rapid diving."
K13 suffered a similar fate during her acceptance trials, when she foundered with the loss of 32 of those on board. The cause of the incident was related to the openings Hall refers to.
Read more about this topic: HMS K5
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