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FIGHTING SHIPS OF THE WORLD
RUSSIA / USSR
SUBMARINES
S-99 submarine (project 617) (1955)


Ships


Name No Yard No Builder Laid down Launched Comp Fate
С-99 [S-99]   617 194 Marti Yd, Leningrad 5.2.1951 5.5.1952 20.3.1956 damaged 19.5.1959, never commissioned again


Technical data


Displacement standard, t

 

Displacement normal, t

950 / 1216

Length, m

62.2

Breadth, m

6.08

Draught, m

5.08

No of shafts

1

Machinery

1 steam-gas turbine unit / 1 8Ch23/30 diesel / 1 PG-100 electric motor

Power, h. p.

7250 / 600 / 540

Max speed, kts

11 / 20

Fuel, t

diesel oil

Endurance, nm(kts)

8500(8.5) / 198(14.2)

Armament

6 - 533 TT (bow, 12 or 20 mines)

Electronic equipment

Flag radar, Tamir-5LS, Mars-24KIG sonars

Complement

51

Diving depth operational, m

170



Standard scale images


<i>S-99 </i>1955
S-99 1955


Project history

Project 617 was the Soviet attempt to build an operational Waller submarine, based on technology captured in Germany in 1945. A special KB was set up in Germany in hopes of reviving the late-war Type XXVI design (22.5kts, 6 bow tubes firing forward and 4 more firing aft, without reloads). In 1946 TsKB-18 recreated the German Type XXVI design from German material; it was assigned Project number 616. This version soon proved unacceptable, so KB-18 began work on a new Project 617 to combine standard Soviet equipment with the 7500shp Walter turbine designed for Type XXVI. The preliminary design was completed by the end of 1947. A new SKB-143 was hived off from TsKB-18 specifically to develop Project 617. German Walter experts were used on the project until 1951. After the first (and, it turned out, only) boat was completed, SKB-143 was assigned to develop the first Soviet nuclear submarine. TsKB-18 took over the Walter project. The Sudomekh yard built a land-based prototype Walter powerplant, tests of which were completed in 1951.

Modernizations

None.

Naval service

On 19 May 1959 S-99 suffered an explosion while starting her Walter plant at 80m depth; mud in the hull valve of her hydrogen peroxide supply pipe caused the peroxide to decompose and ultimately to blow an 8cm opening in the pressure hull, causing flooding. S-99 was never completely repaired and commissioned. She was finally stricken in August 1961.