The St. Petersburg shipyard “Admiralty Shipyards” launched a diesel-electric submarine “Kronshtadt” on September 20, 2018, the first serial ship of the project 677 “Lada”, reports Mil.Press FlotProm. It is expected that the submarine will undergo a full series of tests and will be handed over to the Russian fleet before the end of 2019. Later, the Russian Navy will receive the second serial ship of the project – Velikie Luki. The construction of these submarines is under the contract for the supply of three ships of the 677 project, including the head submarine “St. Petersburg”, which is being tested by the Northern Fleet of Russia.
The submarine “Kronstadt” was laid in 2005, and its construction was regularly delayed. The reason for the delays, in particular, was the difficulty in testing the head ship of Project 677 – “St. Petersburg”. The specialists revealed a number of shortcomings, including the inconsistency of the characteristics of the power plant with the requirements of the military. Because of the difficulties with testing, the Russian Defense Ministry initially planned to completely abandon the construction of a series of ships of Project 677, and then planned to limit only three submarines. The Central Design Bureau of Marine Engineering “Rubin” and the “Admiralty Shipyards” managed to eliminate all the shortcomings in the design of Kronstadt, and in 2019 it is planned to sign a contract for two additional ships of the Lada project.
The displacement of the Lada submarine is 1.8 thousand tons with a length of 66.8 meters and a width of 7.1 meters. The ship can develop under water speed up to 21 knots, and its working depth of immersion is 300 meters. The submarine is armed with six torpedo tubes of caliber 533 millimeters with ammunition for 18 torpedoes. The crew of the submarine consists of 36 people, and its autonomy is 45 days. In the design of the Lada submarines, several new technical solutions have been used that can significantly reduce noise. In particular, we are talking about a new anti-hydro-hull cover of the hull.
In a submarine, equipment, in the process of which vibrations may occur, is installed on the vibro-supports. In addition, the power unit of the submarine uses a multi-mode main propulsion engine with permanent magnets, generally running quieter than traditional asynchronous electric motors. Finally, the submarine of the project “Lada” was made by a half-shell. Under such a scheme, a sturdy body is only partially covered by a light hull, filled with water when immersed and air when it emerges. The polutorakorpusnaya scheme in comparison with the two-hull makes it possible to somewhat reduce the dimensions of the ship, increase its maneuverability and reduce the time of immersion. At the same time, this scheme has a smaller buoyancy margin and requires placing more systems inside the rugged enclosure.
In early 2018, it was reported in 2020 that the Central Research Institute of Ship Electrical Engineering and Technology, together with the Krylov Scientific Center, will complete the development of an anaerobic power plant for submarines. The first such installation is planned to be mounted on the head submarine of the project “Lada” – “St. Petersburg”. In addition, such power plants are planned to be used on perspective diesel-electric submarines of the fifth generation of the Kalina project. Thanks to the anaerobic power plant, the Lada submarine can be underwater for up to 45 days.