Soviet Submarine S-99 (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The S-99 (Russian: -99) experimental submarine was the only ship of Whale class (known locally in the Soviet Union as Project 617) that the Soviet Union built during the early cold war period and the only soviet submarine which had a Walter engine fuelled by high test peroxide (HTP). Initial design of submarine was based on project XXVI documentation taken from Germany as a trophy in 1945 and used in the 1945-1946 development of Project 616. The resultant speed of 19 knots submerged and a 10% buoyancy reserve were assessed as a good but insufficient result, leading to a new project from 1949-1951 based in Leningrad.