The Su-57 fighter jet made its first flight with a fifth-generation engine.

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The Russian Su-57 fighter jet completed its first flight with the fifth-generation Izdeliye 177 engine, the Rostec state corporation reported. It emphasized that the flight proceeded as planned and in accordance with the flight mission requirements.

According to Russian engineers, the "Product 177" has an afterburning thrust of 16,000 kgf. The prototype also features reduced fuel consumption in all modes and increased service life. Technology and materials, innovative design solutions allowed UEC to create an engine that has more advanced technical characteristics compared to previous generation power plants.



The Su-57 has proven itself in real combat conditions and confirmed that it meets the requirements for fifth-generation aircraft systems, including stealth capabilities. The aircraft has naturally attracted high interest from foreign customers, and export deliveries are already underway. Furthermore, the Su-57 continues to be modernized based on experience in the Air Defense Zone: its weapons and onboard systems are being expanded. A new engine, the Izdeliye 177, with increased thrust, will further enhance flight performance and provide significant room for further development.

- emphasize in Rostec.


They note that the multirole fighter is designed to perform a wide range of combat missions. It is capable of engaging air, ground, and sea targets. The aircraft can be used around the clock, including in adverse weather conditions and challenging jamming environments. Its low observability allows it to destroy targets even against modern air defense systems.
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  1. Lawyer
    Lawyer
    0
    22 December 2025 11: 24
    Are you serious??
    In fact, the first flight with this engine took place back in 2017!
    I am attaching a photo and a link.

    https://m.vz.ru/news/2017/12/6/898368.html
    1. mark1
      mark1
      -1
      22 December 2025 11: 46
      You provided a link to another engine—the AL-51, also known as the 30th edition. It's a secret, expensive engine, and apparently only recently entered production. Its performance characteristics (probably other than its service life) are superior.
      And the 177th edition is a development of the AL-41; it is cheaper, more export-oriented and has greater readiness for serial production.
      1. Lawyer
        Lawyer
        0
        22 December 2025 13: 09
        I took a closer look at the engine in this video and compared it again to the 2017 video. It's the same engine.
        1. mark1
          mark1
          +1
          22 December 2025 13: 55
          Have you squinted into the engine's nozzle? You've got some talent.
          1. The comment was deleted.
          2. Lawyer
            Lawyer
            -1
            22 December 2025 13: 59
            These are screenshots from today's video and from a video from 2017. If these are different engines for you, then we can safely end this conversation.
            1. mark1
              mark1
              0
              22 December 2025 14: 08
              Feel free to finish...
              1. kovaleff
                kovaleff
                0
                22 December 2025 15: 48
                You're undermining my spirituality; the main thing here is to believe.
            2. Andrei13
              Andrei13
              +2
              22 December 2025 18: 38
              All I see here is the old version of the nozzle. How can you even determine the engine model here?
    2. Flight
      Flight
      +1
      23 December 2025 02: 43
      Rostec's "successes" are on the rise, and what's the rush? The financial flows never dry up, the man they're reporting to isn't getting any younger, and neither is his memory. Though he tries to look like a youth in the prime of his life, it's no longer so easy—age is invincible. So, when there's nothing to report, you can just wish for reality. Let the old demagogue rejoice.
  2. Andrey Samuylik
    Andrey Samuylik
    0
    22 December 2025 12: 38
    A good spoon for dinner. There are, God willing, about 10 of these machines in the army.

    With the 300 billion that they deposited in Western banks and which are now frozen, 3000 of these fighters could have been supplied to the army.
  3. wladimirjankov
    wladimirjankov
    0
    22 December 2025 20: 48
    The Russian Su-57 fighter jet made its first flight with the fifth-generation Izdeliye 177 engine.

    The fifth-generation engine for the Su-57 was originally declared to be "Product 30." So, "Product 177" is already the second engine for this aircraft. Isn't that too much for one aircraft? Or is there something wrong with the first engine?
    1. mark1
      mark1
      0
      23 December 2025 11: 29
      This is more for re-engining the existing Su-27 family, it fits perfectly when replaced, and also for export versions of the 5th generation and possibly as a backup.
  4. svoroponov
    svoroponov
    0
    2 January 2026 13: 43
    The second-stage engine is currently completing flight testing on the aircraft—the one with the flat nozzle. This version is specifically for international sales. It's better than the first-stage engine but inferior to the flat nozzle. However, its performance is quite good. And with a service life of up to 4000 hours, that's respectable. Perhaps this version of the aircraft with this engine is perfect for India.
  5. AC130 Gunship
    AC130 Gunship
    0
    18 January 2026 03: 53
    Wait a minute. We've been told for 16 years now that we have a 5th-generation fighter.
    Or did the previous one turn out to be 4+++++ or 5- - - ?