Ivchenko AI-25

{{Infobox aircraft begin

|name= AI-25

|image = File:Ivchenko AI-25TL Hu Szolnok 03.jpg

|caption =Ivchenko-Progress AI-25TL turbofan engine

}}

{{Infobox Aircraft Engine

|type= Medium Bypass Turbofan

|national origin = Soviet Union

|manufacturer= Ivchenko-Progress

|first run= 1966

|major applications= Aero L-39 Albatros
Hongdu JL-8
Yakovlev Yak-40

|number built = 9,360+

|program cost =

|unit cost =

|developed from =

|developed into = DV-2

|variants with their own articles =

}}

File:L-39 Engine - Flickr - Beige Alert.jpg]]

The Ivchenko AI-25 is a family of military and civilian twin-shaft medium bypass turbofan engines developed by Ivchenko OKB of the Soviet Union. It was the first bypass engine ever used on short haul aircraft in the USSR.

The engine is still produced by Ukrainian based aircraft engine manufacturing company, Motor Sich.

Development

The AI-25 was designed to power the Yakovlev Yak-40 tri-jet airliner, often called the first regional jet transport aircraft, and is the starting point for the Lotarev DV-2 turbofan engine.{{cite web | title = AI-25 | url=http://www.deagel.com/Turbofan-Engines/AI-25_a001764001.aspx | access-date = 2009-02-21 }} The project was launched in 1965, with the AI-25s first test flight in 1966, and finally cleared for production in 1967. In 1972, the AI-25 was selected for the Polish PZL M-15 Belphegor, the world's only jet-powered biplane.

Development of the AI-25 continued and the uprated AI-25TL was designed for use by the Czechoslovak Aero L-39 Albatros military trainer with the first flight occurring in 1968. The L-39, would go on to become one of the most popular, and widespread trainer aircraft in the world, with over 3,000 L-39s produced, and with 2,900 examples still in active service today. A smaller version of the AI-25TL, the AI-25TLK has equipped the People's Republic of Chinas Hongdu L-11 fighter-trainer.

The AI-25TLK is also licensed built in the People's Republic of China as the WS-11. Another variant of the AI-25, is the AI-25TLSh in the 1990s, which underwent flight testing by the Ukrainian Ministry of Defense in 2002. Ivchenko-Progress is currently marketing the AI-25TLSh as an upgrade to existing L-39 and JL-8 operators that would extend the service life of the aircraft and improve performance. The latest AI-25 is the AI-25TL Series 2 designed for the Mikoyan MiG-AT.{{cite web | title = More detailed information about AI-25 engine family | url = http://www.ivchenko-progress.com/welcome.do?id=162 | access-date = 2009-02-20 | url-status = dead | archive-url = https://archive.today/20130126195150/http://www.ivchenko-progress.com/welcome.do?id=162 | archive-date = 2013-01-26 }}

For the demand of a stronger turbofan engine by Turkey for its jet-powered Bayraktar MIUS UAV the Ukrainian company developed the stronger AI-25TLT variant{{Cite web|date=2021-07-17|title=Baykar Savunma MİUS Sürprizine Hazırlanıyor|url=https://www.savunmasanayist.com/baykar-savunma-mius-surpriz/|access-date=2021-08-09|language=tr}}

Variants

File:PZL M-15 Belphegor at Central Air Force Museum Monino pic1.JPG powered by AI-25 turbofan engine]]

;AI-25:

;AI-25A:

;AI-25TL:

;AI-25TL series 2

;

;AI-25TLT: (Black Sea Shield - turbofan) The AI-25TLT licence-built by Turkish-Ukrainian joint venture BSS based in Istanbul for the Bayraktar MIUS{{Cite web |date=2021-11-11 |title=MİUS'un Motorları İçin Ukrayna İle Yeni Anlaşma |url=https://www.savunmasanayist.com/miusun-motorlari-icin-ukrayna-ile-yeni-anlasma/ |access-date=2022-03-31 |language=tr}}

;AI-25TLK:

;AI-25TLSh:

;AI-25W:

;AI-25WM:

;WS-11: (WoShan - turbofan) The AI-25TLK licence-built in China for the Hongdu L-11

;Walter Titan: (AI-25WM){{cite book |last=Wilkinson |first=Paul H. |title=Aircraft engines of the World 1970 |year=1970 |publisher=Paul H. Wilkinson |location=Washington D.C. |edition=21st |pages=172, 219 }}

;Walter Sirius:

Applications

Specifications (AI-25TL)

File:L-39 Albatros estonian.jpg

{{jetspecs

|ref=Gas Turbine Engines. Aviation Week & Space Technology Source Book 2009. p. 120.Motor Sich product specifications. http://www.motorsich.com/eng/products/aircraft/tde/ai-25tl/ {{Webarchive|url=https://web.archive.org/web/20170110071112/http://www.motorsich.com/eng/products/aircraft/tde/ai-25tl/ |date=2017-01-10 }}{{cite web |work=SE Ivchenko Progress |title=AI-25TL, AI-25TLK turbofan: Performance |url=http://ivchenko-progress.com/?portfolio=ai-25-tl&lang=en#tab-1524053766417-8-1 |access-date=January 12, 2020}}General arrangement drawing.http://www.leteckemotory.cz/motory/ai-25tl/

|type= Medium Bypass Turbofan

|length= {{convert|3358|mm|abbr=on}}

|diameter=~{{convert|611.6|mm|abbr=on}}(intake casing)

|weight={{convert|350|kg|abbr=on}}

|compressor=Axial, 3 fan/low pressure compressor stages, 9 high pressure compressor stages

|combustion=Annular

|turbine=1 high pressure turbine stage, 2 low pressure turbine stages

|fueltype=Aviation kerosene, JP-1 for example

|oilsystem=Pressure spray with return

|power=

|thrust=Takeoff: {{cvt|1720|kgf|kN lbf}}; Cruise: {{cvt|515|kgf|kN lbf}}

|compression=9.5:1

|bypass=2.0:1

|aircon=

|turbinetemp=

|fuelcon={{cvt|468.1|kg/h}}

|specfuelcon=Takeoff: {{cvt|0.6|tsfc|order=flip}}; Cruise: {{cvt|0.815|tsfc|order=flip}}

|power/weight=

|thrust/weight=4.914

}}

References

External links

[https://web.archive.org/web/20090209114232/http://ivchenko-progress.com/welcome.do?page=home Ivchenko-Progress company website]
[http://www.motorsich.com/eng/news Motor-Sich company website] {{Webarchive|url=https://web.archive.org/web/20160118060845/http://www.motorsich.com/eng/news |date=2016-01-18 }}
[https://web.archive.org/web/20090622220335/http://www.aviation.ru/engine/AI/ A.Ivchenko Engines]
[http://www.leteckemotory.cz/motory/ai-25 AI-25 on LeteckeMotory.cz] (cs,sk)

Category:Ivchenko-Progress aircraft engines

Category:Medium-bypass turbofan engines

Category:1960s turbofan engines