|Zaporozhye Machine-Building Design Bureau Progress State Enterprise named after Academician A.G.Ivchenko|
Detailed description of D-18T engine
The engine modular design and highly developed monitoring and diagnosis system ensures its on-condition operation. The engine consists of 17 modules.
The D-18T three-shaft engine of a high bypass ratio has become the first in the USSR turbofan engine with a thrust of more than 20 000 kgf. 19.09.1980 - first start of a full-scale engine. 24.12.1982 - An-124 maiden flight. 19.12.85 – engine passed official bench tests. The D-18Т engine is also installed in An-225 Mriya aircraft. 188 units of engine are currently in operation. Total flight time is more than 1 million hours.
The An-124 Ruslan aircraft ensure up to 90% of market of unique, out-size, superheavy cargo air transportation. A development of Ruslan commercial operation, higher Customer’s requirements to the engine service life and fuel efficiency were resulted in a new improved engine version, D-18T series 3.
D-18T Series 3
Due to the undertaken design and technological efforts it was possible to improve the engine reliability, fuel efficiency and durability. If the first D-18T engines featured a service life to first overhaul of 500 hours, assigned service life of 1000 hours, for today’s D-18T series 3 engines an on-condition operation till serving out service life of main parts (with flight cycle of 4.5 hours and minimum service life of 5535 flight hours) is permitted by Aviation Register of Interstate Aviation Committee with its Supplement to Type Certificate No. 23-D/03 dated 19.02.1998. The works on a further improvement of the engine consumer’s characteristics are executed now.
D-18T Series 4
For improving a load-carrying capability and effectiveness of the An-124-100 aircraft a new modified engine version, designated as D-18T series 4, generating increased (~ by 10%) thrust at takeoff power rating was designed. For this the following efforts were introduced:
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