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    PAK-FA, T-50: News #5

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    Austin

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    Re: PAK-FA, T-50: News #5

    Post  Austin on Fri 15 Mar 2019, 05:22

    https://tvzvezda.ru/news/opk/content/201811131419-5mml.htm

    Surpasses all analogues: the developer revealed the features of the engine Su-57

    the General Designer-Director “OKB im. A.M. Cradles "Yevgeny Marchukov.

    “I would say that this generation 5+ is slightly ahead of the fifth one. It is to this generation that the engine corresponds to specific gravity, specific consumption and specific gravity, ”Marchukov said. Marchukov noted that the engine surpasses all foreign analogues in terms of specific gravity, is a completely new product and has nothing to do with the engine of the Su-35 fighter.
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    Austin

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    Re: PAK-FA, T-50: News #5

    Post  Austin on Fri 15 Mar 2019, 05:23

    what does specific gravity means , I think its the translation error
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    Re: PAK-FA, T-50: News #5

    Post  Big_Gazza on Fri 15 Mar 2019, 10:19

    Austin wrote:what does specific gravity means , I think its the translation error

    It reads as "specific thrust" at least once on the site according to Chrome translator. I suspect its a product of an ignorant and careless journalist.
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    Re: PAK-FA, T-50: News #5

    Post  LMFS on Fri 15 Mar 2019, 13:55

    It seems "specific thrust" indeed. Remembering that in the last interview with Marchukov it was specified that this metric is to be understood as thrust / flow. If this was related to dry settings it would mean the engine has a higher operating temperature and/or lower BPR than F119, meaning superior technology and confirming VCE design, since in the other hand we know that SFC is similar to that of a AL-31F, but I think this is considered with A/B in operation so it is not that clear to me how to make conclusions about the engine core. Some engines seem to have more A/B thrust than they should if you only consider thrust augmentation due to the amount of bypass air being used in the afterburner (F135) and others have more (AL-41F1), so it is not clear to me what is more efficient to create wet thrust for a given engine diameter, a higher or a smaller BPR. If anyone can clarify it would be great
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    Re: PAK-FA, T-50: News #5

    Post  GunshipDemocracy on Fri 15 Mar 2019, 14:07

    «Я бы сказал, что это поколение 5+, немного опережающее пятое. Именно этому поколению соответствует двигатель по удельной тяге, удельному расходу и удельному весу», - рассказал Марчуков.


    1) specific thrust

    2) (Brake ?)-specific fuel consumption

    3) specific weight
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    Austin

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    Re: PAK-FA, T-50: News #5

    Post  Austin on Sat 16 Mar 2019, 06:28

    LMFS wrote:Su-57: an innovative solution TsAGI

    In early 2010, the air first flew the prototype aircraft T-50. Russian multi-role fighter of the fifth generation, developed by OKB imeni P. O. Sukhoi within the framework of the project "PAK FA" (Promising aviation complex tactical aviation), now is called su-57.

    In the Central Aerohydrodynamic Institute named after Professor N. E. Zhukovsky new aircraft started to be developed in the framework of scientific research in 1999. Professionals leading center of aviation science in cooperation with the Sukhoi design Bureau was to create a fighter with a number of unique features that have properties, the implementation of which are mutually contradictory. It was necessary to develop aircraft system with functions of fighter, interceptor and attack aircraft. The high combat effectiveness of the PAK FA should be provided with technical solutions in the field of aerodynamic layout, stability and controllability, control systems, propulsion, radar and infrared visibility, avionics and weapons.

    Together with employees of the Sukhoi design Bureau and TSAGI scientists have developed the aerodynamic shape of the aircraft that meets the requirements of the fifth generation fighter. Were created not having analogues in the world adjustable stealth intake, which ensures steady operation of the engine on all flight modes. The specialists of the Institute developed a control system for maneuvering the aircraft is statically unstable in the lateral and longitudinal control channels. Ensuring the strength of the airframe with the widespread use of new and composite materials is another challenge that scientists TSAGI has successfully solved. The result was requirements met to the weighted design parameters of the aviation system, the weight of perfection of the aircraft. In a short time carried out work in the areas of safety from flutter, aeroelasticity, design and shimmy of the wheels.

    Specialists of the Institute conducted a unique research design the layout of a fighter. In wind tunnels of TSAGI were investigated 28 different models of aircraft; the total number of trials exceeded 32 thousand. Successfully completed testing of new materials and design elements.

    After the first flight of the prototype studies for improvement of flight of the machine continued. So, over the next nine years in TSAGI refined the aerodynamic characteristics of the complex were compared with the results of flight tests, worked out the safety of the new aircraft armament. In the process of preparing and conducting flight tests were carried out frequency of tests all created for this aircraft.

    http://www.tsagi.ru/pressroom/news/4264/

    Can any one in simple English help us understand based on what TSAGI said about PAK-FA layout , Unstable aerodynamic characteristics etc

    How is this design different from Eurofighter , Rafale or F-22 Design approach. Any key differentiating factor and how PAK-FA could be better or not so better compared to these designs ?
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    Re: PAK-FA, T-50: News #5

    Post  marcellogo on Sat 16 Mar 2019, 09:57

    Austin wrote:
    LMFS wrote:Su-57: an innovative solution TsAGI

    In early 2010, the air first flew the prototype aircraft T-50. Russian multi-role fighter of the fifth generation, developed by OKB imeni P. O. Sukhoi within the framework of the project "PAK FA" (Promising aviation complex tactical aviation), now is called su-57.

    In the Central Aerohydrodynamic Institute named after Professor N. E. Zhukovsky new aircraft started to be developed in the framework of scientific research in 1999. Professionals leading center of aviation science in cooperation with the Sukhoi design Bureau was to create a fighter with a number of unique features that have properties, the implementation of which are mutually contradictory. It was necessary to develop aircraft system with functions of fighter, interceptor and attack aircraft. The high combat effectiveness of the PAK FA should be provided with technical solutions in the field of aerodynamic layout, stability and controllability, control systems, propulsion, radar and infrared visibility, avionics and weapons.

    Together with employees of the Sukhoi design Bureau and TSAGI scientists have developed the aerodynamic shape of the aircraft that meets the requirements of the fifth generation fighter. Were created not having analogues in the world adjustable stealth intake, which ensures steady operation of the engine on all flight modes. The specialists of the Institute developed a control system for maneuvering the aircraft is statically unstable in the lateral and longitudinal control channels. Ensuring the strength of the airframe with the widespread use of new and composite materials is another challenge that scientists TSAGI has successfully solved. The result was requirements met to the weighted design parameters of the aviation system, the weight of perfection of the aircraft. In a short time carried out work in the areas of safety from flutter, aeroelasticity, design and shimmy of the wheels.

    Specialists of the Institute conducted a unique research design the layout of a fighter. In wind tunnels of TSAGI were investigated 28 different models of aircraft; the total number of trials exceeded 32 thousand. Successfully completed testing of new materials and design elements.

    After the first flight of the prototype studies for improvement of flight of the machine continued. So, over the next nine years in TSAGI refined the aerodynamic characteristics of the complex were compared with the results of flight tests, worked out the safety of the new aircraft armament. In the process of preparing and conducting flight tests were carried out frequency of tests all created for this aircraft.

    http://www.tsagi.ru/pressroom/news/4264/

    Can any one in simple English help us understand based on what TSAGI said about PAK-FA layout , Unstable aerodynamic characteristics etc

    How is this design different from Eurofighter , Rafale or F-22 Design approach.  Any key differentiating factor and how PAK-FA could be better or not so better compared to these designs ?

    Adjustable stealth intakes probably means that they are both variable and stealth ones something that no other VLO or LO plane got (F/A-18E and F-22 got fixed intakes, F-35 and J-20 have DSI).

    With the exception of the horizontal and vertical unstable thing, that I would list just as a redundant specification, nothing on the article is actually a new, just a confirmation of what they always stated and that just a bunch of 'murica's fanboys actually contested.

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