Military Review

NPO Energomash is developing a new rocket engine

32



A few days ago it became known that the Samara TsSKB Progress proposed a new engine for promising super heavy-class launch vehicles using liquefied natural gas as fuel. According to the latest reports of the national press, Khimki NPO Energomash announced their ideas about the future of rocket engines. Academician V.P. Glushko. To improve the performance of advanced engines are encouraged to equip the combustion chamber, working on new principles.

The Vzglyad publication, citing representatives of NPO Energomash, writes that the company has already developed a combustion chamber of the original design. The engine equipped with it will be able to significantly improve its performance - the expected increase in power reaches 10% in comparison with the engines currently used. The new design of the combustion chamber makes it possible to use the principle of engine operation that has not yet been mastered in practice, namely the so-called. detonation burning fuel. The ideas underlying the new project were formulated by Academician Ya.B. Zeldovich several decades ago, but still has not reached the practical application in the rocket and space industry.

“Vzglyad” cites the words of the general designer of NPO “Energomash” on science P. Levochkin, according to which the groundwork for the late thirties of the last century became the basis for the new project. The specialist noted that to this level the limit of the capabilities of the liquid rocket engines built according to traditional schemes has been reached. Working through various ways to further improve engine performance, the specialists of NPO Energomash began to study the chemical processes that accompany the work of the power plant. In the course of these studies, the designers turned to the works of Ya.B. Zeldovich, which offered interesting methods to improve engine performance, primarily detonation combustion.

The essence of detonation burning is as follows: during burning, a shock wave propagates through the substance-fuel, initiating the burning of new sections of the substance. The energy released during combustion, in turn, supports the shock wave. The study of detonation burning involved many scientists. At the end of the thirties, Ya.B., who worked independently of each other. Zeldovich (USSR), J. Von Neumann (USA) and V. Dering (Germany) almost simultaneously developed the same model of the phenomenon, later called ZND by their names. It is proposed to rely on these works in the new project.

As P. Levochkin told, the promising rocket engine will use the so-called. spin detonation. This means that in one of the sections of the combustion chamber during its operation there will be a shock wave rotating in a circle at a speed of up to 8 thousand revolutions per second. By design, a combustion chamber adapted for this kind of work will hardly differ from existing systems. However, in its design it is necessary to take into account the increased loads arising from the detonation of fuel.

The use of detonation combustion of fuel will not only improve the performance of the engine, but also slightly reduce the size of the combustion chamber. Increasing engine power by about 10% will have several positive effects at once. For example, it will be possible to reduce the fuel supply or increase the payload of the launch vehicle. As a result, the flexibility of the missile can be noticeably increased.

The timing of the appearance of the first launch vehicles with engines using the phenomenon of detonation combustion of fuel is not yet known. According to recent reports, a combustion chamber for a promising power plant has already been created. Apparently, in the foreseeable future, construction of prototype engines will begin, which will later be used in tests. Operation of the new engines is likely to begin in the distant future - not earlier than the first half of the twenties, but it is too early to speak about exact terms.

Prospects for the new engine is also not completely clear. The proposed technologies can significantly improve the characteristics of the engines, but the use of new engines on the launch vehicles is not a question. Which rockets will be equipped with promising engines developed by NPO Energomash has not yet been determined.

After the appearance of serial rocket engines based on the new technology of NPO Energomash named after Academician V.P. Glushko will reaffirm his status as one of the world's leading enterprises in the industry. One of the most well-known enterprise developments is the RD-170 engines and the RD-180 developed on its basis. RD-180 in recent months has been the subject of controversy and even court sessions.


On the materials of the sites:
http://vz.ru/
http://i-mash.ru/
http://itar-tass.com/
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  1. Russian jacket
    Russian jacket 21 May 2014 09: 38
    +3
    It is correctly said that the new is the well-forgotten old .. hi
  2. sim6
    sim6 21 May 2014 09: 55
    +6
    Right direction. I am reading today in UkrSMI: "The US Congress suggested compel Ukraine to break off cooperation with Russia in rocketry. According to American lawmakers, the United States should convince the Ukrainian authorities to end cooperation between Yuzhnoye Design Bureau under Yuzhmash and Russia in servicing Voevoda R-36M2 missiles (NATO classification SS-18, Satan).
    In addition, the relevant US agencies and organizations need to think about how they could take advantage of the capabilities of KB Yuzhnoye". I'm shocked, to be honest, and after all, with such a government (or rather a junta) they can achieve their goal. It's a shame ..
    1. Baikal
      Baikal 21 May 2014 10: 03
      +2
      Tuna them salmon.
      The main thing is that Russia will not surrender the "Voevod".
    2. postman
      postman 21 May 2014 16: 49
      +1
      Quote: sim6
      , The United States should convince the Ukrainian authorities to stop cooperation "Yuzhnoye Design Bureau"

      Fine, the Russian Federation will save about $ 10-13 million per year.
      We can do technical control and service ourselves.

      And the Yuzhnoye design bureau, well, well. correctly noted:
      Quote: Baikal
      Tuna them salmon.


      Quote: sim6
      In addition, the relevant US agencies and organizations need to think about how they could take advantage of the capabilities of the Yuzhnoye Design Bureau.

      They will not use it in any way: the technological base will not allow
      +
      "By the time of the proclamation of independence in Ukraine, there was already a powerful scientific and industrial cooperation of rocket and space organizations associated with the KBYU, which became the basis for the formation of the national rocket and space industry"
      Where is it the national rocket and space industry of Ukraine?

      In 2010, 3 launches of spacecraft from different countries of the world were successfully completed using the Dnepr and Zenit-3 launch vehicles.
      In 2011, one spacecraft has already been successfully launched using the Zenit launch vehicle.
  3. abrakadabre
    abrakadabre 21 May 2014 10: 06
    +7
    10% power increase for modern systems that have already reached the limit of efficiency, this is very, very much. In this case, it perfectly overlaps the propulsion sector of the planet-orbit.
    Still close the sector of powerful mid-flight engines of the interplanetary class: electro-reactive, MHD, etc. with nuclear power plants. With traction, for example, 50-100 kgf. Then we can seriously talk about interplanetary expeditions and a real regular presence on the moon.
    1. saag
      saag 21 May 2014 11: 27
      +6
      And the nuclear RD-0410 had a draft of 3 tons :-) and a pulse of 900s
      1. Bersaglieri
        Bersaglieri 21 May 2014 16: 02
        0
        Good remote control for interorbital tug
      2. abrakadabre
        abrakadabre 22 May 2014 08: 01
        0
        And the nuclear RD-0410 had a draft of 3 tons :-) and a pulse of 900s
        Well, I no longer roll the sponge into traction of 3 tons. After all, I understand that the matter is rather not in the engine, but in the power plant and the total supply of the working fluid on board.
        Electro-reactive impulse can be 20-30000 s. With a thrust of 50-100 kg, this is how it would be useful for an interplanetary flight in a reasonable amount of time.
  4. Jurkovs
    Jurkovs 21 May 2014 10: 15
    0
    I note once again that the present "fathers" of cosmonautics have absolutely no strategic vision of problems. They work on the principle "what you please". The need for heavy carriers is small, and therefore the economic issues are not so acute for them, and therefore the most modern technologies must be worked out on them, I think that engines of heavy carriers should run on hydrogen. This will make it possible not to completely lose ground in "Energy" and to be always at the cutting edge of technology. The need for missiles of medium and low payload capacity is very great, here the issues of efficiency come to the fore. Therefore, an LNG engine needs to be built for them, and not for heavy rockets. It is with a high frequency of starts that the lower cost of LNG than kerosene will become decisive.
  5. iCuD
    iCuD 21 May 2014 10: 16
    0
    estimated capacity growth reaches 10%

    Power growth is a rather vague term. I would even say that this is a rather muddy statement. And why then in the USSR they did not seriously engage in the engine on this fuel? It seems to me, certainly not because of a lack of technology.
    It is much more interesting to know the estimated specific impulse of the new fuel.
    Specific momentum is a measure of the effectiveness of rocket fuel. According to one definition, this is the number of seconds during which the engine can develop a thrust of 1 Newton, spending 1 kg of fuel.
    1. abrakadabre
      abrakadabre 21 May 2014 10: 31
      +2
      Power growth is a rather vague term. I would even say that this is a rather muddy statement.
      I agree completely. But as part of the chat and discuss the article, I do not see the point of paranoid clarification of the terminology. Although usually advocate for it. It’s not on the doctoral defense.
      Despite my liberties with terminology, you understood me correctly and I understood you correctly.
      wassat hi
    2. schizophrenic
      schizophrenic 21 May 2014 10: 37
      0
      Quote: iCuD
      Power growth is a rather vague term. I would even say that this is a rather muddy statement. And why then in the USSR they did not seriously engage in the engine on this fuel? It seems to me, certainly not because of a lack of technology.
      It is much more interesting to know the estimated specific impulse of the new fuel.


      An increase in power of 10 percent may mean, with a rough estimate, another 100 tons will be removed from 10 tons without increasing the mass of the engine. And more precisely, the engine design itself, and not the fuel, will play a role here. Yesterday at VO they published about the prospects of LNG, there are also disadvantages and advantages.
  6. rotor
    rotor 21 May 2014 11: 45
    +1
    It is necessary to create reusable rocket engines and reusable launch vehicles, which will make space more accessible and help in the exploration of the moon.
    1. The comment was deleted.
    2. siberalt
      siberalt 21 May 2014 12: 49
      +1
      This requires a different theory of physics. But she is still not allowed, like so much more.
      1. gridasov
        gridasov 21 May 2014 20: 55
        +1
        Absolutely right. And not only the theory of physics. We need methods of complex analysis based on mathematics. After all, it is impossible to create efficient engines without taking into account the same transformations in the fuel flow. We need methodologies for analysis at any point in a local interconnected space. I can tell right away that these engines are already out of the picture and have critically incorrect technical solutions. These design solutions lead to the fact that with an increase in the rate of fuel outflow in the supercharger, a potential difference is created between it and the surfaces of the outflow, at certain critical moments this will cause an elementary "breakdown" to other parts. This I am exaggerated, but the fact that it can cause destruction in the fuel line is absolutely certain
  7. xolod_22
    xolod_22 21 May 2014 12: 18
    +1
    One thing is good, there is further development, they are trying to introduce new principles, and they are not stupidly stamping engines for sale to the West. So GOOD LUCK!
  8. Mikhail3
    Mikhail3 21 May 2014 12: 49
    0
    What do we want from space? Here is the unresolved issue so far. If we are comfortable in the niche of a cheap bomb, please, throw a traveler into orbit, cheaply and quickly, this is one thing. Or are we going to GO into space? Heavy orbital platforms, the moon (3 helium) and so on? Then it is necessary to increase power, and start using the nuclear engines beyond the atmosphere. It’s already good to be cowardly, not in the right position to bow down ....
  9. crambol
    crambol 21 May 2014 13: 00
    0
    Judging by the given perspective is impossible. In fact, there are laboratory studies of individual parts of the general idea. It's too early to talk about prospects. We will wait for the results.
    1. gridasov
      gridasov 21 May 2014 21: 01
      +1
      I can say with absolute certainty that I’ll have to start from scratch anyway. The current direction has exhausted itself. An elementary analysis of the polarization of various systems and by groups allows us to say that the higher the desire to raise the so-called. power, the more often there will be an accident. A key element of the problem will be and is a fuel supercharger.
  10. Simonov
    Simonov 21 May 2014 13: 15
    +3
    At the beginning of 1996 (or 95? Or 97?), An article about metal fuel jet engine. The reaction chamber (combustion?) Of the fuel had the form of a cyclic spiral. I then somehow did not particularly pay attention to this article. But right after publication in the press - complete silence and now I can not find traces of this publication.
    (True, six months later a small note appeared in the same newspaper with an appeal to readers. Like, dear readers, if you have any ideas in your mind about equipping astronauts or the interior equipment of the spacecraft for interplanetary flights, send it. No matter how fantastic these ideas are looked)
    Comrades, who heard (read) what about these engines? Share the info.
    1. postman
      postman 21 May 2014 19: 17
      +1
      Quote: Simonov
      Comrades, who heard (read) what about these engines? Share the info.

      1. The idea in the 1930s of Zander about the use of metal fuel in a rocket engine.
      2. A ramjet engine on a powdered metal combustible patent RU 2439358

      3. A supersonic rocket with an engine on powdered metal fuel-RU 2410291

      4. almost all TTRD: with the addition of metals (aluminum, magnesium, lithium, beryllium), metal hydrides.
      5. in liquid RT for LRE also metal additives
      Modern Engineering for Design of Liquid Propellant Rocket Engines (Progress in Astronautics and Aeronautics) - “Rocketdine” / scoreboard below /
      ===========
      The goal is to increase the calorific value and fuel density
      1. gridasov
        gridasov 21 May 2014 21: 08
        0
        The direction of the solution is correct because the potential energy of the flow of a substance consisting of a denser structure is always higher. BUT the question is that you need to know how to get sufficient dispersion of such fuel and you need to "carry it with you" separately. At the same time, the technology for realizing the potential energy of the flow substance makes it possible to use the flight environment itself as a fuel. Or at least a separate closed loop generator. A known liquid metal can be used as an emulsion with an even better known substance. Then the ionization processes of the outflow will be, by themselves, generating impulses of the disturbance potential.
        1. postman
          postman 21 May 2014 22: 42
          +1
          Quote: gridasov
          potential energy

          kinetic
          http://upload.wikimedia.org/math/4/7/e/47e9b229d10c7888594e760a4ef0b4f0.png
          with of equal flow rates (nozzle and COMBUSTION HEAT)
          Quote: gridasov
          to obtain sufficient dispersion of such fuel and it must be "carried with you" separately.

          Do not carry anything separately.
          For solid propellant rocket motors in a mixed "checker"
          For LRE - already in H2
          For clauses 2 and 3, which cited (Rospatent) met. powder and eat fuel
          Quote: gridasov
          flow substances

          what kind of beast is this?
          Quote: gridasov
          Then the ionization processes of the outflow will, in themselves, generate impulses of the disturbance potential.

          my brain power is not enough to comprehend the utterance ... what
          1. abrakadabre
            abrakadabre 22 May 2014 08: 08
            0
            my brain power is not enough to comprehend the utterance ...
            Also nIasilil. Maybe this is another quatrain of Nostradamus?
          2. gridasov
            gridasov 26 May 2014 13: 54
            0
            Yes guys! You are returning to first grade with you.
            - Sufficient dispersion. This is an increase in the area of ​​contact of dispersed particles of a substance to the level when an avalanche-like polarized interaction with the medium in which it is dispersed occurs. substance is located. Such processes can be implemented only as high-speed, or rather when physical. events occur simultaneously in various space vectors. In other words, for example, when aluminum is extracted in the process of el. emission, which means a sufficient level of dispersion, so that when it reacts with water, it is transformed as separation into hydrogen and oxygen. I think it’s clear.
            - Well, it's generally embarrassing to ask such questions. Any dynamic flow is formed by the substance that forms this flow. That is, the complex properties of the dynamic flow of the outflow and those properties of the substance that participate in such a process arise. That is, water can be considered as a stream in the cavitation transformation as hydrogen and oxygen. BUT the addition of, for example, aluminum or mercury to the substance of the water stream forms emulsions with these substances. The result is an increase in the ionization properties of the outflow of the stream itself and a change in the quality of cavitation transformations. This means that in the local space it is possible to create significant energy-generating or absorbing processes.
            - The third follows from the second. Variable high-pulse flow flows create variable magnetic pulses. They are not difficult enough to remove, as from the polarization contours of such an electro-hydrodynamic generator.
  11. Tommygun
    Tommygun 21 May 2014 14: 41
    +1
    LNG as a rocket fuel has one important advantage over kerosene, its cryogenic temperature, which gives better cooling of the compressor and nozzle, and, accordingly, allows you to increase the characteristics of the engine.
    1. postman
      postman 21 May 2014 17: 01
      0
      Quote: Tommygun
      LNG as a rocket fuel has one important advantage over kerosene, its cryogenic temperature, which gives better cooling of the compressor and nozzle, and, accordingly, allows you to increase the characteristics of the engine.

      ?
      1.Production of LNG ("cryogenic" temperature) - 25% of the volume of NG (these are costs) + COSTS FOR TRANSPORTATION, STORAGE, FUELING
      2. Only an insignificant part (fraction of a percent) of all the heat generated in the chamber is transferred to the engine structure
      LRE: Kerosene-oxygen has a LARGE heating value than LNG-oxygen, HEAT CAPACITY OF NON-CRYOGENIC KEROSENE Enough
      3. Although in most cases fuel is used for regenerative cooling of the wall of the combustion chamber and the upper, most heated part of the nozzle, NO oxidizer (OXYGEN) prevents this, which is used in H2 + O2 LPRE (oxygen cools less heat-loaded zron of the LPRE, and H2 more)
      Quote: Tommygun
      and accordingly allows you to raise the characteristics of the engine.

      Do not pick up.
      1.Km
      2. Characteristics of TNA
      3. The theoretical limit of chemical rocket engines reached de facto for 2013
  12. postman
    postman 21 May 2014 17: 09
    0
    1. LNG density = 400 kg / m³.
    Specific calorific value: 28—46 MJ / m³

    2. The density of kerosene is 780-850 kg / cm³

    specific heat of combustion about 43 MJ / kg.
    Any questions?

    ====================
    Organization of "detonation combustion" or the use of the potential of "free radicals" for LRE: kerosene + oxygen = ALWAYS WILL GIVE MORE benefits (and even at the lowest cost) than for LRE: LNG + Oxygen
    To "obtain LNG, it is necessary to spend 25% of the volume of produced NG (compression + cooling, multi-cycle)
    + storage (T = -150) + transport (T = -150) + refuel (T = -150)
    to the georium that there is O2 is added a haemorrhoid with fuel, the volume of which is required 3-5 times MORE

    much easier with kerosene
    ===============================
    only +, lighter than air (GHG vapor), therefore it does not accumulate, but rises
    up and disappears
    1. gridasov
      gridasov 21 May 2014 21: 15
      0
      Scientists are already confused in the illusory numbers and formulas. The solution is to build a mathematical space in which any change will be analyzed. Highly potential processes of turbulent flow outflow within the systems, as well as in the outer shell, are interconnected. Without new complex analysis methods, any solution will be private and not related to a change in the system. Not only the ship's construction system, but also the flows of the outflow of the external environment and inside.
      1. abrakadabre
        abrakadabre 22 May 2014 09: 03
        0
        Scientists are already confused in the illusory numbers and formulas. The solution is that ...
        "Ostap was carrying ..."
        1. gridasov
          gridasov 22 May 2014 12: 02
          0
          Nothing like this! The design parameters of the turbine working section can be based on the harmonious construction of lines and circles. Lines as vectors, and circles as schematics for creating a potential difference. We are accustomed to transmitting impulses through linear conductors, "THEY" do it differently. It’s elementary, and PERELMAN and POINCARE were based on this in their proofs. Knowing only the radius, we can talk about the possible limits of the generated ionization potential from ZERO to the required value. Sun !!!! And what pounds of jdoules are there, etc. Therefore, it does not carry me, but YOU. Everyone believed that they were right, but they cannot connect some concepts that determine physical states with others. The turbine is already there and the analysis is not coming from the ceiling.
  13. gregor6549
    gregor6549 21 May 2014 18: 18
    0
    The process is, of course, good. Still to live to see the result, and not to such as launching a Proton at a given point in China.
  14. Anisim1977
    Anisim1977 21 May 2014 21: 15
    0
    The more different engines, even the most exotic ones, the better. I'm tired of this stagnation already.
  15. Simonov
    Simonov 22 May 2014 07: 22
    0
    Colleagues, the article was not about a chemical engine. A chemical engine in interplanetary space must carry an oxidizer supply. The engine mentioned in the article worked on unstable isotopes. Those. Initially, heavy metal is taken and irradiated to the state of an unstable isotope. This isotope decays into matter with a lower atomic mass and a bunch of protons and neutrons. Part of the beam is closed by feedback to obtain the next unstable isotope, and part by the realization of a reactive pulse. And so on to the smallest stable atomic mass.
    The article, among other things, described the problem of protecting the crew from hard radiation.
    1. Voronbit
      Voronbit 22 May 2014 07: 36
      0
      and that it really can work77 .... it seemed to me. that there are simpler things of shooting mass with speed
    2. abrakadabre
      abrakadabre 22 May 2014 09: 04
      0
      Perpetuum mobile however
    3. gridasov
      gridasov 22 May 2014 12: 12
      +1
      Right ! This is what we are talking about, that any substances can be radioactive, by their properties determining this state. Absolutely any. The question is in the technology of organizing this process, which gives these properties. And for this there is no need to carry out pre-preparation of this "fuel". Namely, we will say that the intra-atomic radial fractal structure, which determines the higher potential energy of matter, is characteristic of metals. But not just metals. Metals in which the potential difference is formed in layers relative to the radius of the outflow surface. And it is known what kind of substance. Therefore, we are talking about a complex mechanical device in the form of a turbine, but which simultaneously carries out nuclear transformations of the substance of the outflow stream.
  16. Voronbit
    Voronbit 22 May 2014 07: 30
    0
    pi ar ...... no one will deal with this hopeless crap
    1. gridasov
      gridasov 22 May 2014 12: 23
      0
      This is not PR. This is a well-grounded and thought-out project in the calculations. The difficulty for many will consist only in mastering the methodology of complex mathematical analysis. It is the changed basis of the analysis that allows taking into account such aspects of the process that are hidden behind the non-obviousness of perception. By the way, this methodology is the basis for binary code as the basis of the architecture for constructing computations to be replaced with code based on nat. numbers. Turbulent and high-performance, complex-radial calculations are the only way to mathematically describe the highly potential physical ones. processes. Modern scientists are trying to describe turbulent high-potential processes using low-potential and linear methods. analysis. It doesn’t work out that way.
  17. silberwolf88
    silberwolf88 25 May 2014 02: 46
    0
    Continuous improvement of technology ... achieving new results in the qualitative improvement of engines ... this is the way that will ensure Russia’s work in space ... will allow to realize any goals and tasks of putting spacecraft into orbits of the earth and into outer space.
    Finally, I heard for myself why we consider liquefied gases as rocket fuel ... and due to which the effects of increasing the power of rocket engines will be achieved.
    1. gridasov
      gridasov 25 May 2014 12: 35
      +1
      We people are so self-confident in our innocence that we are unable to see the manifold ways of developing and improving our civilization. And I admit that our team just tried to see aspects of energy transformations in an alternative form. This does not mean that an attempt was made to mercantile self-assertion or the desire to be the first. It was just necessary to try to accept some information as already existing, but not accepted by all of us. Now it is absolutely possible to assert that the path to new technologies lies through a new worldview. We must or are simply obliged to see the process of events that we are analyzing and to highlight particular cases in it already. Now everything is happening as always. We strive for results without understanding its place in the process.
      Improving technology is commonplace verbiage like everything else. If a person wants to break into the world of highly potential interactions. then it must be perceived as a highly capacitive and highly dynamic event space. So, there must first be methods of such a highly effective analysis.
      Therefore, we so brazenly, but honestly assert that the potential energy of transformation of the substance of the medium in which the internal transformation process in the rocket is located is not used and is not taken into account at all. That is, we consider the rocket engine as itself, without understanding the essence of the highly turbulent outflow of the flow of both fuel and oxidizer and the combined medium into which "everything goes". There is not even an approximate concept of turbulence, of how and why the polarization of the outflow flow and the outflow surface occurs. How this polarization is formed and distributed. While the conclusion is simple, liquefied gas fuel already exists in the exhaustive sense of its existence and application. But it is not transformed by modern "jet engine" technology. It is not surprising, but in the physical algorithm of the process, everything is the other way around. Then this concept as an increase in power disappears altogether. Power becomes a gradient of simple physical and geometric concepts that increase or decrease the potential of the flow intensity and its transformation rate.
  18. Simonov
    Simonov 26 May 2014 11: 43
    0
    It is possible that the approximate model may be a description of transients as the growth and transformation of fractals. Although this is an extensive method, not an intensive one.
    1. gridasov
      gridasov 26 May 2014 14: 04
      0
      This is possible for you. And for us, everything should have a completely accurate and comprehensive definition and place. One can look for mathematical solutions as special cases, which is done everywhere, or one can mathematically construct the space of all possible interactions. Then each decision will be only a measure of possible transformations.
  19. gridasov
    gridasov 12 June 2014 20: 07
    0
    If someone carefully read my posts, then I responsibly stated that the critical component of the rocket engine is a fuel turbo supercharger. The special commission to investigate the causes of the accident PROTON-M previously concludes that it was this node that caused the accident. Moreover, the bearing is the part of the load because it connects the rotor part of the turbine and the stator. which means that it is in this device that email is connected. magnetic circuits of two systems. Therefore, the breakdown of polarized circuits can occur precisely in them. Moreover, it’s obvious to me, if it’s not a person not related to rocket science, that if sliding bearings are used, they are not structurally thought out because the rolling-in vector of the direction of rotation of the contact parts of the outer and inner rings is not taken into account, which means that they lubricate or not lubricate, they have slide, not scroll. This is the path to disaster. Because the desire to make engines more powerful brings with such constructive solutions to the limit and critical modes of operation. BEFORE destruction.