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Project 885 / 885M - Layout

Unlike all previous projects of the Soviet nuclear submarines, the Yasen submarine was designed using a one and a half shell hull architecture, which was required to reduce the level of internal noise. The robust hull with a length of about 93 m is divided into 9 compartments and reinforced with 125 frames. The average size of the spacing is assumed to be approximately 750 mm and varies depending on the location of the frames. Intersection bulkheads are located in the area of frames 15, 29, 37, 50, 68, 83, 100 and 117. In the first compartment, 12 m long, having the smallest diameter, there is a central post with access to a solid wheelhouse - a pop-up rescue chamber, combat posts and hardware of the sonar complex. Around the first compartment and in the nose from it there is a nasal group of tanks of the main ballast (5 CBH).

In the second compartment, with a maximum diameter and length of 9.75 m, there are breech parts of the TA and racks with ammunition. Retractable device drives and partly other auxiliary systems are also located there. Pipes of torpedo tubes, as well as torpedo-loading hatches pass through the conical part of the hull at the junction of the 1st and 2nd compartments. This arrangement of torpedo loading hatches is an unusual technical solution, given that for most boats with an onboard arrangement of torpedo tubes, the hatch is located in the center behind the wheelhouse. This decision made it possible to transfer the hatches to the central part of the hull, preserving the very successful layout of the torpedo-loading hatch of Soviet third-generation boats with bow-mounted torpedoes.

The third compartment has a length of 5.25 m and accommodates on four decks various instrumentation equipment and general ship equipment, such as diesel generators, refrigerators, pumps and converters. The fourth compartment, 9 m long, is reserved for various residential and medical facilities, as well as a number of auxiliary systems.

The 2nd, 3rd and 4th compartments account for about 40% of the total length of the PC and do not have a light hull, but only a light add-on. Behind them, the pressure hull gets a significant narrowing and two-hull performance.

The fifth missile compartment has a length of 12.75 m. The middle group of the Central Security Center (4 tanks) and the rapid-immersion tank are concentrated in its area. Next is the sixth reactor compartment, 10.5 m long, with an equalization tank located around it to hold the boat in depth during rocket firing. In the seventh turbine compartment, 12 m long, there is steam turbine plant equipment, autonomous turbine generators and other power equipment. Around it is concentrated the feed group of the CBH (5 tanks). The eighth compartment, 12 m long, contains auxiliary mechanical, general ship equipment and aft hatch. Behind it is the tiller compartment 3.75 m long with hydraulic feed tail units.

As a material of the pressure hull [Ru = "durable case"], a low-magnetic high-strength steel of a new type was chosen. The entire bow of the boat is allocated for a large spherical antenna of the sonar complex. Behind its fairing, above the structural waterline, there are bow horizontal rudders, and below them there are 10 torpedo tubes of 533 mm caliber at an angle to the ship’s diametrical plane. This design solution, characteristic of the US nuclear submarines and almost all other countries of the world, was first implemented on a submarine of the Russian Navy. Another characteristic feature is the “fan-shaped” arrangement of SLTs at an angle to the longitudinal axis of the housing, as a result of which the lowest apparatus is slightly inclined upward and the highest apparatus downward. Initially, the use of weapons of caliber 533 and 650 mm was supposed, but later it was decided to abandon this.

Ash, on the whole, has a relatively large elongation for Russian boats and a ratio of length to beam of about ten. This is caused, not least, by the relatively small diameter of the pressure hull, due to its architecture, as well as the presence of a rocket compartment, including eight vertical shafts. The tail unit is made according to the classic cruciform pattern. The boat received a relatively long railing of retractable devices, typical of the Malachite SPMBM "limousine" form with an integrated pop-up rescue chamber.

It was assumed that the surface displacement of the nuclear submarines is 9,500 tons, the underwater displacement is 11,800 tons, the working immersion depth is 480 m, the maximum depth is 600 m, the crew is 85 people, including 32 officers. The length of the boat is 119 m, the width of the stabilizers is 15.5 m, the maximum width of the hull is 12.0 m, and the average draft is 9.5 meters.

Project 885M differs slightly from the base one, mainly because it succeeded in almost completely eliminating counterparty deliveries from neighboring countries. In addition, the Kazan submarine had slightly improved contours of the deckhouse, superstructure and sections of the light hull. A new design pop-up rescue chamber was developed, operating simultaneously in the bar module mode with telescopic mast devices with shortened fairings. In addition, for the new modification, numerous scientific studies of emergency situations related to internal explosions and collisions with the ground were carried out and emergency safety of a nuclear power plant in such emergency situations was ensured.

Longitudinal section of the project 08850 - 1 - The main spherical antenna HAK; 2 - bow emergency buoy; 3 - a nose fairing; 4 - antenna shield; 5 - horizontal bow rudders; 6 - torpedo loading hatch; 7 - antenna HAK; 8 - running bridge; 9 - VSK; 10 - non-penetrating periscope; 11 - lifting mast devices; 12 - entrance hatch; 13 - fifth missile compartment with mine launchers; 14 - the sixth reactor compartment with polyurethane foam, biological defense tanks and pumps; 15 - Cylinders of the VVD system; 16 - aft emergency buoy; 17 - aft hatch; 18 - tiller compartment with feed steering drives; 19 - exhaust device towed antenna HAK; 20 - propeller shaft; 21 - permeable volumes; 22 - nasal trim tank; 23 - nasal group of the Central City Hospital; 24 - the first compartment of the CPU and HAC equipment; 25 - nasal AB; 26 - partition RDK; 27 - airborne TA; 28 - tank replacement torpedoes; 29 - central AB; 30 - ammunition on the shelves and in the device for quick loading; 31 - second torpedo compartment; 32 - the third compartment of auxiliary and general ship equipment; 33 - the fourth residential compartment; 34 - the middle group of the Central State Library, the tank of rapid immersion and the tank replacement missiles (not shown); 35 - seventh turbine compartment with vocational schools and ATG; 36 - feed group CHB; 37 - GTZA; 38 - capacitor; 39 - GED; 40 - eighth compartment of auxiliary mechanical equipment; 41 - main thrust bearing of the propeller shaft; 42 - aft ballast tank. 36 - feed group CHB; 37 - GTZA; 38 - capacitor; 39 - GED; 40 - eighth compartment of auxiliary mechanical equipment; 41 - main thrust bearing of the propeller shaft; 42 - aft ballast tank. 36 - feed group CHB; 37 - GTZA; 38 - capacitor; 39 - GED; 40 - eighth compartment of auxiliary mechanical equipment; 41 - main thrust bearing of the propeller shaft; 42 - aft ballast tank.

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Page last modified: 28-12-2021 19:22:52 ZULU