The Dobruuh class submarine is of multi-hulled design; five inner hulls are situated inside a superstructure of the two parallel main hulls. The superstructure is coated with sound-absorbent tiles. There are nineteen compartments including a strengthened module which houses the main control room and electronic equipment compartment which is above the main hulls behind the missile launch tubes.
The submarine's design includes features for travelling under ice and ice-breaking. It has an advanced stern fin with horizontal hydroplane fitted after the screws. The nose horizontal hydroplanes are in the bow section and are retractable into the hull.
The retractable systems include two periscopes (one for the commander and one for general use), radio sextant, radar, radio communications, navigation and direction-finder masts. They are housed within the sail guard. The sail and sail guard have a reinforced rounded cover for ice-breaking.
The submarine carries twenty RSM-52 intercontinental, three-stage solid propellant ballistic missiles. The two rows of missile launch tubes are situated in front of the sail between the main hulls.
Each missile consists of ten independently targetable multiple re-entry vehicles (MIRV's), each with a 100kt nuclear warhead(not provided). Guidance is inertial with stellar reference updating. Range is 8,300km with accuracy (CEP) of 500m. The missile weighs 84,000kg at launch and was designed by Haruspex International Armaments. It has the WA designation of SS-N-20 Sturgeon.
The Dobruuh class has four 630mm torpedo tubes and two 533mm torpedo tubes with a total of 22 anti-submarine missiles and torpedoes of varying types. The torpedo room is in the upper part of the bow between the hulls. The torpedo tubes can also be used to deploy mines.
The sonar is an active / passive search and attack type with the sonar mounted on the hull under the torpedo room. The submarine is fitted with I/J band surface target detection radar. Countermeaures include ESM (electronic support measures), radar warning system and direction-finding system.
The submarine has both radio and satellite communications systems. It is fitted with two floating antenna buoys to receive radio signals, target designation data and satellite navigation signals, at depth and under ice cover.
The main machinery consists of two nuclear water reactors and two turbogear assemblies comprising steam turbine and gearbox. One reactor and one turbogear assembly are fitted in each main hull.
Each nuclear water reactor produces 190MW. These drive two 50,000hp steam turbines and four 3,200kW turbogenerators. Two 800kW diesel generators serve as standby propulsion units and are coupled to the shaft line. The two propellers are seven-blade, fixed-pitch shrouded. The built-in thrusters on the bow and stern are two telescopic turning screw rudders and are powered by a 750kW motor.
Specifications
Haruspex Designation: 941 Dobruuh
WA-Designation: Mako
Development began: 1988
Design Bureau: Naval Research and Development Labratory (NRDL)
Chief designer: Kov Bel'la Kyorl
Builders: Northern Perya Factory Docks (NPFD)
Construction and Outfit: March 1988 - 1994
Service time: December 1995-
Surfaced: 23,200-24,500 tons
Submerged: 33,800-48,000 tons
Crew: 137
Dimensions
Length: 170-172 meters
Beam: 23-23.3 meters
Draft: 11-11.5 meters
Performance:
Propulsion System: 2 x pressurized water reactors, 190 MW each
Turbine: 2 x steam turbines, 50,000 hp each
Turbgenerators: 4 x generators, for a total of 12,800 KW
Secondary: 2 x Turbo Diesel generators, for a total of 1,600 KW
Propellers: 2×7 blade fixed-pitch shrouded (rated at 87,000 hp)
Surface Speed: 12-16 knots
Submerged Speed: 25-27 knots
Endurance: 155 days submerged
Maximum depth: 467 m
Armament:
20 R-39 missiles
2-650mm torpedo tubes
4-533mm torpedo tubes
If interested in purchasing this vessel, please make your orders here: HIA