The Progress D-436 is a triple-spool high-bypass turbofan engine developed by the Ukrainian company

Ivchenko-Progress Ivchenko-Progress ZMKB (, ''Zaporizhzhia Machine-Building Design Bureau "Progress" State Enterprise named after Academician O.H.Ivchenko''), formerly OKB, OKB-478 and Ivchenko Lotarev, is a state design bureau that creates drafts and plans for ai ...

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 Zaporozhie, 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 On 24 February 2022, , starting the largest and deadliest war in Europe since World War II, in a major escalation of the Russo-Ukrainian War, conflict between the two countries which began in 2014. The fighting has caused hundreds of thou ...

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)

References

External links

* {{Ivchenko aeroengines Ivchenko-Progress aircraft engines High-bypass turbofan engines 1980s turbofan engines Three-spool turbofan engines