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Project 1155 Fregat I Udaloy-I class - Design

Having received a technical assignment from the Supreme Naval Leadership of the country, the designers of the Northern PKB did not reinvent the wheel when developing project documentation. A “Solomon's decision” was made to use all the best from previous projects, the Burevestnik type of patrol boats and the Berkut type large anti-submarine ship ( BOD ) project. Both types of vessels have proved their effectiveness in practice, having good seaworthiness and wide combat capabilities.

The impetus for the creation of a new project was the commissioning of the American fleet of new submarines capable of covertly operating on sea lanes and near bases and locations of the Soviet Navy. The new ship should have better vision and increased autonomy of navigation. In addition, there was an urgent need to equip a combat ship with effective protection against anti-ship missiles. The fighting near the Falkland Islands in the summer of 1982 between Great Britain and Argentina clearly demonstrated the inadequacy of the defense of formations of warships from air strikes.

An excellent example of the weakness of combat ships in the face of the threat of a missile strike was the sinking of the British destroyer Sheffield during the fighting near the Falkland Islands (Malvinas). A completely modern ship of Her Majesty’s Fleet, the destroyer URO “Sheffield” burned down from an Exocet missile launched from an Argentinian bomber. In addition to the new electronic equipment and air defense system, the new ship should have a greater cruising range. Operational tasks faced by the Soviet fleet, demanded the fight against submarines and ships of the likely enemy at a considerable distance from the bases of the fleet.

Creating a new ship, the designers were instructed to make the ships go into series on the production capacities of the Soviet shipyards without delay and delay. In this regard, many nodes and assemblies of the new BOD were similar in their parameters to the details and nodes of the previous project 1134A. The displacement of the ship was also in the acceptable parameters - 4200 tons.

The only thing that had to be changed was to significantly increase the original dimensions of the ship. For the installation of a new hydroacoustic station, a longer housing was required. In all other respects, the new BOD of the project 1155 strongly resembled large anti-submarine ships of the Berkut type. The combat equipment was reinforced by an anti-submarine helicopter and anti-submarine weapon systems. The highlight of the project was the updated radar and hydroacoustic complex. It was decided to create a vessel with a larger displacement, without looking at the production capabilities of the Yantar shipyard.

On the project ships, the air defense system was significantly strengthened , which, instead of the traditional Osa anti-aircraft missile system, was equipped with advanced Dagger air defense systems. The number of 30-mm anti-aircraft guns was increased to four pieces. Starting from the 8th serial ship of the large anti-submarine ship of the project 1155 Severomorsk, the former Simferopol, on all subsequent serial ships were set to use new materials in the design. This made it possible to significantly extend the life of the vessels.

At the last stage of project development, a number of radical decisions were made. Two helicopters were to be based on the project 1155 frigates. The ship was additionally equipped with another of the radar tracking systems. It was necessary to significantly improve the other tactical and technical characteristics of combat ships. The final form of the project took in 1976. It was already a ship with a displacement of 7,000 tons. The propulsion system, had a capacity of 62,000 hp, with the possibility of increasing to 80 thousand hp Accordingly, the ship should have increased the maximum speed, up to 29 knots. The main difference of the new type of propulsion system is the ability to quickly move to the configured mode of operation.

The result was a combat ship similar in the main specifications [TTX] with the BOD of the “Berkut” type only at a completely different qualitative level. The appearance of the ship has also changed greatly. New radar significantly reduced the area of superstructures. At the stern of the frigate a significant place was given to the helicopter hangar. The greater displacement allowed the installation of two artillery systems, the AK-100 and AK-630, on the “Delaia”.



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