Quebec-class submarine

Shipyard 194 Leningrad

29 (Project A615 )

Lower edge Sonar: 3.59 m

2 × M -50A diesel engines 700 hp 1 × Type -32A diesel engine 900 hp 1 x PG -106 electric motor 78 hp

1 × sechsflügelig

  • 4 × torpedo tubes (bow) ∅ 533 mm
  • 1 × 25 -mm gun 2M -8

Active sonar Tamir -5 Passive sonar Feniks Nakat ESM system Flag radar

Project A615 was the designation of the Soviet Navy for a class of diesel-electric submarines, which were intended for coastal use. NATO designated project A615 as Quebec class.

  • 2.1 M -256
  • 3.1 Notes and references
  • 3.2 Literature

History

Project 615

Project 615 was based on experiences you had done in the 1940s with experimental arrangements to increase the use efficiency of U- boats. The idea was to use only one type of motor for over-and underwater ride. German developers had simultaneously been developed for this purpose with the circulatory drive a functioning outside air independent system. According to the Soviet researchers but they did not have access to knowledge that had been gained in Germany with Walter or circulatory systems in their work.

Because of the experimental nature of the concept, it was decided to install an additional conventional marine diesel engine. Thus, two normal M -50 and one type of diesel engine -32A were installed, the latter was treated with liquid hydrogen peroxide to be able to operate independently of the outer air can. 100 tons of the substance were carried as fuel reserve. Because hydrogen peroxide attacks the metal, the fuel supply in plastic tanks had to be stored.

The two M -50 diesel engines with 900 hp allowed an overwater top speed of 17.2 knots. In diving trip with the Type -32A engine 15,44 nodes have been reached. The range was 1,700 nautical miles. As a crew 29 sailors were provided.

The armament consisted of four 533 -mm torpedo tubes without reserve torpedoes, so that only four torpedoes could be fired before a project -615 - boat had to stop its use for reloading. To defend against aircraft in an attachment to the submarine tower a double- 2M -8 machine gun was located, which could fire 25 mm shells at targets up to 3,000 meters.

The small dimensions of the boats proved to be decisive disadvantage, since modern sonar systems could not be accommodated here.

After the completion of M -254 as the only boat of the project 615, it was decided to make various changes to the following submarines of the class.

Project A615

Project A615 was the mass-produced version of the project 615 Here, the two M-50 engines were replaced by more efficient M -50A engines, which contributed only 700 instead of the previous 900 hp. Thus, the range of boats increased to 3,150 nautical miles. To reduce the workload for the sailors, the crew was increased to 33 men. Of 100 planned copies only 29 boats of the A615 project were built in the years 1953 until 1957. Then the project was discontinued.

Units

The M -261 in Krasnodar and the M -296 in Odessa were preserved as museum ships and can be visited today.

M -256

The boat was laid on 23 September 1953, the Leningrad shipyard in Kiel 196 and put into service after its completion in 1955. During a diving trip in the Baltic Sea it seemed to Tallinn in the engine room, an explosion and a subsequent fire. Since the risk of further explosions was, was the commander show up and evacuate the crew on deck. The continued burning fire damaged the boat so much that after three hours of water penetrated into the fuselage and M -256 sank over the stern. Due to bad weather met a rescue ships was delayed and could only seven sailors fish out of the water. M -256 was lifted later and examined. However, the cause of the explosion could not be determined and the wreck was scrapped in 1958.

Documents and references

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