{
  "id": "enwiki-001375359441",
  "slug": "progress-d-436",
  "title": "Progress D-436",
  "qid": "",
  "lead": "The Progress D-436 is a triple-spool high-bypass turbofan engine developed by the Ukrainian company Ivchenko-Progress during the Soviet era, and manufactured by Motor Sich in Ukraine. It was initially developed to meet the requirements for late versions of the Yakovlev Yak-42 and the Antonov An-72 in the 1980s. The engine first ran in 1985 and was subsequently certified in 1987. Several variants have been developed and are currently in service with a variety of aircraft.",
  "body": "The Progress D-436 is a triple-spool high-bypass turbofan engine developed by the Ukrainian company Ivchenko-Progress during the Soviet era, and manufactured by Motor Sich in Ukraine. It was initially developed to meet the requirements for late versions of the Yakovlev Yak-42 and the Antonov An-72 in the 1980s. The engine first ran in 1985 and was subsequently certified in 1987. Several variants have been developed and are currently in service with a variety of aircraft. ==Design and development== The D-436 engine was developed as a follow on to the Lotarev D-36. The engine took several of its design features from that engine and another Progress engine, the Progress D-18. The D-436 incorporated an updated, higher RPM fan, a lower emissions combustor, and new compressor sections. Several variants of the engine incorporate a FADEC. The Motor-Sich plant in Zaporizhzhia, where the assembly line for D-436 engines was located, was destroyed by Russian forces in late May 2022 following the 2022 Russian invasion of Ukraine. ==Variants== ]] D-436K: The \"K\" variant was the initial model of the engine. It had a bypass ratio of 6.2 and a pressure ratio of 21.0. Proposed for use in the defunct Antonov An-71. D-436M: The \"M\" variant was proposed for use on the Yak-42M. D-436T1: The \"T1\" variant is used on the Tu-334 and has been offered for use on the in-development Tu-414. See detailed specifications below. The variant was also proposed for use on the now-defunct An-174. D-436T1-134: The \"T1-134\" variant was proposed as a replacement for the engines on the Tupolev Tu-134. D-436T2: The \"T2\" variant is uprated to of thrust and is used on the Tu-334-100D and the Tu-334-200D. D-436TP: The \"TP\" variant is a specific \"maritime\" corrosion-resistant version developed for use in the Be-200 amphibious aircraft. This variant produces 7,500 kgf (16,534 lbf) each. D-436T3: The \"T3\" variant added a booster section behind the new wide-chord fan and had a maximum thrust around . The T3 variant was also considered for the Il-214, but the aircraft's thrust requirements exceeded the max engine thrust of . D-436-148: The \"-148\" variant was developed specifically for the An-148. This version is derated to of thrust for longer engine life. D-436TX: The \"TX\" variant uses the same core at the \"T3\", but includes an updated turbine and a geared fan. It is in the class. ===Derivatives=== AI-436T12: This derivative engine was designed for use on the Irkut/Ilyushin MC-21. It was projected to produce of thrust. Irkut has since replaced the AI-436T12 with the Aviadvigatel PD-14. ==Applications== Antonov An-148 Antonov An-72/74 Beriev Be-200 Tupolev Tu-334 Yakovlev Yak-42M ==Specifications (D-436-T1)== ==See also== ==References== ==External links==",
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  "license": "CC BY-SA 4.0",
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    "id": "enwiki-001375359441",
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    "title": "Progress D-436",
    "author": [
      {
        "family": "Anticloud FZ LLE",
        "literal": "Anticloud FZ LLE"
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    ],
    "container-title": "encyclopegia.org",
    "publisher": "Anticloud FZ LLE",
    "publisher-place": "Dubai, United Arab Emirates",
    "URL": "https://encyclopegia.org/a/progress-d-436",
    "issued": {
      "date-parts": [
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          2026,
          11,
          15
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    "license": "CC BY-SA 4.0",
    "DOI": "eo1:enwiki-001375359441",
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