Lotarev D-36

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Ivchenko Progress D-36MV.jpg
Type Turbofan
National origin USSR
Manufacturer Ivchenko-Progress
Motor Sich
First run 1971
Major applications Antonov An-72
Antonov An-74
Yakovlev Yak-42
Developed into Lotarev D-136
Progress D-436

The Ivchenko Progress D-36 (also known as Lotarev D-36) is a three-shaft high bypass ratio turbofan currently produced by the Ukrainian Motor Sich company.[1]

Design and development[edit]

The engine was developed for the Yak-42, An-72 and An-74 aircraft and was very advanced when it was first introduced in the 1970s. The engine was designed by Vladimir Lotarev. The first test runs began in 1971, first flight tests followed in 1974, serial production began in 1977.

The engine has a single-stage fan with 29 titanium blades and a Kevlar outer shell, which is driven by a three-stage turbine. The six-stage low pressure compressor with titanium blades is driven by a single-stage non-cooled low pressure turbine. The seven-stage high-pressure compressor with steel blades is driven by a steel bladed high-pressure turbine.

Since the tradition in the Soviet era was to gradually and continuously improve engines in serviceability, engines went from Series 1 to 3A (depending on the application). The Series 1 (used on Yak-42D) did not feature any reverse thrust system however, series 1A to 3A were fitted with bucket-type thrust reversers (used on An-72/An-74). The most recent upgrade (after the Soviet breakup) is Series 4A which has been in manufacture since 2002. Improvements included updated curved titanium blades and a built-in reverse thrust device. More advanced blade design along with proprietary wear-resistant and heat-protective coatings have resulted in improved specific fuel consumption (kg/h/kgf) dropping from 0.65 to 0.63. Specified service life has also improved exponentially to 40,000 hours. The current application for Series 4A is on An-74TK-300.


Type Thrust (kN) Bypass
at Start
Fan Diameter (mm) Length (mm) Weight (kg) Introduction Application
Series 1 63.75 5.6:1 20:1 1,333 3,930 1124 1971 Yakovlev Yak-42
Series 1A/2A 63.75 5.6:1 20:1 1,333 3,192 1124 ? Antonov An-72
Antonov An-74
Series 3A 63.75 5.6:1 20:1 1,333 3,192 1124 ? Antonov An-74
Series 4A 63.75 5.6:1 20:1 1,333 3,732 1130 2002 An-74TK-300

Data from Élodie Roux,[2] page 158

General characteristics

  • Type: 3-shaft turbofan
  • Length: 3.47 m (136.6 in)
  • Diameter: 1.333 m (52.5 in)
  • Dry weight: 1,109 kg (2,445 lb)


  • Compressor: 7-stage high-pressure compressor, 6-stage low-pressure compressor
  • Turbine: 1-stage high-pressure turbine, 1-stage low-pressure turbine, 3-stage free-power turbine


See also[edit]

Related development

Related lists


  1. ^ Motor Sich D-36 product page Retrieved: 6 January 2013
  2. ^ Élodie Roux (2007). Turbofan and turbojet engines: Database handbook. pp. 158159. ISBN 9782952938013. OCLC 804131087.