Military Review

Amphibious boats of the project 21820 "Dugong"

Project 21820 landing craft the Dyugon code (according to NATO codification - Dyugon) is a series of the latest Russian airborne landing craft, the lead ship of the series is the Ataman Platov D-105 boat. Currently, it is the only ship built under this project and is part of the Caspian flotilla. Today, 2 more boats of this project are under construction - one is being built at OJSC Vostochnaya Verf in Vladivostok, the second at OJSC Volga Shipbuilding Plant in Nizhny Novgorod. Also in 2011, a contract was signed for the construction of a series of 3 landing craft of project 21820 at OJSC Yaroslavl Shipyard. The first of the three ships of this series was laid down at YaSSZ on January 18, 2012, the ship received the name "Denis Davydov."

The lead boat of this project was laid in 2006, and since 2010, it is part of one of the Caspian flotilla formations and was named Ataman Platov in honor of the commander of the Great Don Army, whose regiments in 1814 were in Paris and gave the French capital a new the type of catering establishments is a bistro (from the Russian word “quickly”), since the Cossacks in Parisian cafes demanded that they be served as soon as possible. It is worth noting that the landing craft laid in Yaroslavl will receive the names of the heroes of World War 1812 of the year, which in the year of its 200 anniversary seems to be really relevant. Three boats under construction in Yaroslavl will be named “Denis Davydov”, “Lieutenant Rimsky-Korsakov” and “Midshipman Lermontov”. The last two were members of the naval guard crew and participated in the 1812 campaign of the year.
Amphibious boats of the project 21820 "Dugong"

The landing craft of the 21820 “Dugong” project was developed in Nizhny Novgorod by the specialists of the “Hydrofoil Central Design Bureau”. R. E. Alekseeva. This design bureau specializes in the field of scientific research, design and creation of high-speed ships, ships and boats with dynamic principles of maintenance. Constructors and scientists of this design bureau created ekranoplans that have no analogues in the world, or as they are also called - “Caspian monsters”. This is the rocket "Lun" and the airborne "Eaglet", which were able to reach speed during the main mode of motion to 500 km / h. For projects created in the "Central Design Bureau for hydrofoil vessels" to them. R. E. Alekseeva produced more than 8 000 hydrofoil ships for both civilian and military purposes.

Currently, speed during amphibious operations plays an increasing role. The faster equipment and troops will be delivered to the bridgehead, the greater the chance that success in this area will be developed. The experience gained by Russian sailors during the use of the 11770 “Serna” landing boats once again confirmed this axiom. But another thing became obvious: today, as an independent combat unit, even more high-speed ships are required, with greater airborne capability and payload. At the same time, the amphibious and mobile characteristics of the new ships had to correspond to the similar characteristics of boats of the 11770 project. These circumstances became the impetus for the creation of a new airborne boat on an air cavity, which was the boat of the Dugong project 21820.

The total displacement of landing craft on a Dugong air cavity is 280 tons, the greatest length is 45 meters, the greatest width is 8,5 meters., The draft is 1,9 meters. The maximum travel speed is 35 knots at the height of the 0,75 wave meter. The ship can also be used in storm conditions with a wave height of no more than 3,5 meters. Amphibious boats of the 21820 project are equipped with two diesel engines of the M507A-2 type with the power of 9 000 hp. each. The maximum cruising range is 500 nautical miles. Cargo hold dimensions are 27x6,8x2,34 meters, maximum payload is 140 tons, the landing craft can carry up to 3-x MBT or 5 BTR.

In the control system of the landing craft "Dugong" together with the sea information and computing complex MIVK 6P-08B, the gyrocourse indicator GCU-5, the LI2 1 lag and the engines that are equipped with tachometers of the ТЭ-204 type are also used by the autopilot "Agat -NXX". Production "NPP" ANFAS "Saratov city). At the same time, it is possible to use an upgraded autopilot “modified 3”.

The propulsion and steering complex of the landing craft, which includes a ventilated jet propulsion unit, does not stand for the dimensions of the hull of the vessel and makes it possible to work effectively in conditions of clogged waters and shallow water. The crew of the landing craft is 6 people. On the landing boat is armed. In the standard configuration, it consists of 2-x large-caliber machine guns MTPU caliber 14,5-mm, as well as 8 MANPADS of the type “Needle”. At the request of the customer, the composition and equipment of weapons can be changed.

The fairly high combat performance of the ships of this project, in particular the only landing craft Ataman Platov in service, was confirmed as part of the strategic maneuvers Center-2011, which also took place in the Caspian Sea. As part of the exercises, the amphibious assault ship quickly delivered to the battlefield and landed armored vehicles and marines on the unequipped coast.

It is reported that these vessels can be used together with the landing helicopter docks of the Mistral project, which are being built today for the Russian Navy. Tank assault boats of projects 11770 "Serna" and 21820 "Dugong" are fully suitable for the "Mistral" in terms of their overall weight and size characteristics. Such boats in conjunction with aviation the Mistral group is designed to deliver arms and landing forces of a dock ship to the shore.

Currently, the construction of 21820 project ships for the needs of the Russian Navy continues. And the Central Design Bureau for the SEC them. R. E. Alekseeva continues to work on improving the boats of this project and the creation of new modifications. All of them differ from each other in the main power plants, layout solutions, propellers, travel speed and displacement. But at the same time, everything is perfectly suitable for use in amphibious operations in the waters of closed and semi-enclosed seas, gulfs and archipelagic waters.

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  1. desava
    desava 24 October 2012 08: 19
    Nice, very nice to read the article. So the Central Design Bureau for the SPK them. R. E. Alekseeva lives! And the ship pleased me - I do not know much about it, nevertheless, apparently it was developed at the modern level and its ability to operate with the Mistral-type UDC is provided. It is curious whether it fits into the Frenchman's docking camera.
    1. dimanf
      dimanf 24 October 2012 18: 17
      Quote: desava
      So the Central Design Bureau for the SEC. R. E. Alekseeva lives!

      ROSTISLAV ALEKSEEV - that was talent!
    2. Civil
      Civil 24 October 2012 22: 03
      The chamois seems to fit ...
      1. Lucky
        Lucky 27 October 2012 00: 14
        For more of them to us!
  2. Chicot 1
    Chicot 1 24 October 2012 11: 13
    I don’t feel like talking trite, but ... A nice and very necessary ship. And there would have been more ...
    CARBON 24 October 2012 11: 14
    Something too long for the "Mistral" -45 meters, it seems to have been designed for American LCATs. Although one may fit.
    1. Goryn
      Goryn 4 May 2013 13: 12
      LKATy- this is French- Amer LKAKi
  4. Poppy
    Poppy 24 October 2012 11: 58
    And what does "air cavity" mean?
    1. urzul
      urzul 24 October 2012 12: 05
      Vessels in the air cavity are a continuation of the development of vessels with a dynamic principle of maintenance. Possessing the high-speed characteristics of hydrofoils, they have the opportunity to approach the unequipped shore.

      Air cavity aka dynamic airbag. Due to the bottom profile, air is blown under the bottom when MOVING.
    2. Armata
      Armata 24 October 2012 12: 06
      This means that the design of the housing is such that when moving under the bottom, an air bag forms which reduces friction and cavitation by reducing the contact spot with water. The simplest example from the earliest is hydrofoil boats. But there the air is pumped by 2 compressors. but here due to the geometry of the case.
      1. Very smart
        Very smart 24 October 2012 14: 04
        A colleague, it seems to me that you are slightly confused in the design of vessels with dynamic maintenance.
        Short course of the theory of a question.
        One of the first was a boat with a redan. On the bottom there was a ledge on which the hull "leaned" at speed and rose above the water. A vacuum region was created behind it, and the wetted surface and, consequently, the resistance significantly decreased.
        The development of this design was a hydrofoil boat. The hull rose above the water due to the lifting force on the wing, immersed in water. The wetted surface of the hull decreased, and the flow around the wing is a clear question. It did not show much resistance.
        A further development of this scheme were ships on "columns", when the hull was completely out of the water, and the propellers were themselves placed in the area of ​​the hydrofoils. Such models have been tested and have shown good results for small displacements.
        Separately stand hovercraft. There, the hull was lifted above the water by blowing air under it. Such vessels in operating mode are not fully displacement.
        A special direction in dynamic designs are ekranoplans. These are, in fact, airplanes using the physical effect of the screen, i.e. increase the lifting force of the wing in the presence of a close surface. For their take-off, a large engine power and a high speed set are required, and then in marching mode the power is significantly reduced, and the ship flies on a surface.
        Mechanic, pumping 2 air into hydrofoil compressors - you're lost.
        1. Armata
          Armata 24 October 2012 14: 15
          Quote: Very smart
          Mechanic, pumping 2 air into hydrofoil compressors - you're lost.
          About the fact that hydrofoil I did not say a word. The injection went under the hull (I can tell you this based on the fact that I myself once repaired them in practice. And the fact that I’m off topic is designing one of these ship systems. Here is the last example in which we participated.
        2. 77bor1973
          77bor1973 24 October 2012 14: 39
          For example, the ship "Zarya", such ships are also called "skegovye."
          1. Rzzz
            Rzzz 14 November 2018 09: 07
            Dawn - planing.
  5. borisst64
    borisst64 24 October 2012 12: 05
    When I read that in the Great Patriotic War, our troops lost the battle for the Crimea primarily because of fears of amphibious assault (units were distributed along the coast), the attitude towards amphibious naval ships became more respectful.
  6. desava
    desava 24 October 2012 16: 25
    Quote: Mechanic
    The injection went under the body

    Moreover, now they are seriously considering the possibility of reducing the hull resistance by exhaust gas discharge and special air blowing for large civilian vessels. So that it is not only not new, but it is becoming very common.
    1. Armata
      Armata 24 October 2012 18: 46
      Yes, there are such thoughts. But so far only in projects.
  7. Samovar
    Samovar 24 October 2012 22: 24
    Project 21820 landing craft cipher "Dugong"

    Honestly, I first found out about him. Well, God forbid, even such a fleet will arrive.
  8. woodman
    woodman 24 October 2012 22: 35
    The boat "Ataman Matvey Platov" is the head of the squadron of "Cossack" boats. In my opinion, the Don Army signed an agreement for the supply of crews to these ships. The names are assigned to the heroes of O.V. 1812 - Cossacks. How "Warrant Officer Lermontov" got there - I don't know.
    Platov was the "commander", that's right. But first of all, he was the ataman of the Don Cossacks.
    A cavern can be obtained in different ways. For example, stick little pegs in the bottom of the ship, such as nails. Well, like your hedgehog on your back .... Well, give that hedgehog a good pendal. To fly on needles, barely touching the water. Only pendail should be oh how good)))
    1. Dikremnij
      Dikremnij 25 November 2012 03: 44
      I am sure that these pegs will not last long from the resistance of water and from friction, so I think this effect on these boats is achieved in some other way, I think the most likely option is the geometry of the hull bottom.
      1. Alex 241
        Alex 241 25 November 2012 04: 05
        The cavern is achieved by applying excess pressure under the bottom of the vessel and not due to little pegs, which, in addition to increasing resistance and excess load, give nothing.
  9. Somad
    Somad 26 October 2012 10: 02
    The article is good, but the mention of Ataman Platov is somehow dubious. An unaware reader will think that the emergence of a bistro is the only merit of the Cossacks Platov during the Patriotic War of 1812. And it seemed to me that on the first photo of the boat on the superstructure, for some reason, a banner with Chinese characters ...
  10. Dikremnij
    Dikremnij 25 November 2012 03: 40
    Well, finally, the Ministry of Defense understood that it was necessary to increase the presence of the Navy in the oceans, and not rave about the massive airborne assaults.
    From if still for the re-equipment of the Air Force and the purchase of new communication systems and ACS undertook ...