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Kuznetsov NK-25

{{short description|1960s Soviet turbofan aircraft engine}}

{{Infobox Aircraft Begin

| name = NK-25

| image = Двигатель НК-25.JPG

| caption =

}}

{{Infobox Aircraft Engine

| type = Turbofan

| national origin = Soviet Union

| manufacturer = Kuznetsov Design Bureau

| first run =

| major applications = Tupolev Tu-22M

| number built =

| program cost =

| unit cost =

| developed from =

| variants with their own articles =

| developed into =

}}

The Kuznetsov NK-25 is a turbofan aircraft engine made by the Soviet Kuznetsov Design Bureau and used in the Tupolev Tu-22M strategic bomber. One of the most powerful supersonic engines in service today, it is rated at {{cvt|245|kN|lbf}} thrust. The three shaft engine was designed in the years 1972–1974.

Applications

Specifications (NK-25)

{{jetspecs

|ref=motor-s.ru,{{cite web |title=NK-25 |url=http://motor-s.ru/NK25.htm |website=motor-s.ru |archive-url=https://web.archive.org/web/20020408174824/http://motor-s.ru/NK25.htm |access-date=14 October 2021|archive-date=2002-04-08 }} Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK{{cite book|title=Otechestvennaya aviatsionno-kosmicheskaya tekhnika - SAMARSKIY NTK|publisher=SNTK imeni N.D.Kuznetsova|location=Samara, Russia|language=ru|pages=42, 43, 77}} and engine.aviaport.ru{{cite web |title=Tot samyy "NK"|url=http://engine.aviaport.ru/issues/08/page39.html |website=engine.aviaport.ru |publisher=Nikolay Aleksandrov |access-date=4 October 2021 |language=ru}}

|type=Three-spool low-bypass afterburning turbofan

|length={{cvt|7300|mm}}

|diameter={{cvt|1770|mm}} at the nozzle casing

|weight={{cvt|3575|kg}}

|compressor=3-stage LP, 5-stage IP and 7-stage HP

|combustion=Annular multi-nozzle combustion chamber

|turbine=4-stage axial turbine

|fueltype=

|oilsystem=

|power=

|thrust=

  • {{cvt|245|kN|lbf}} wet
  • {{cvt|145|kN|lbf}} dry

|compression=25.9

|bypass=1.45

|aircon={{cvt|211|kg/s|lb/s}}

|turbinetemp={{cvt|1597|K}}

|fuelcon=

|specfuelcon=

  • 2.1 kg/(kgf⋅h) wet
  • 0.58 kg/(kgf⋅h) dry

|power/weight=

|thrust/weight={{cvt|6.99|kgf/kg}}

}}

See also

{{aircontent

|see also=

|related=

|similar aircraft=

|lists=

|similar engines=

}}

References

{{reflist}}

External links

  • [http://www.leteckemotory.cz/motory/nk-25 NK-25] on LeteckeMotory.cz (Czech)

{{Kuznetsov aeroengines}}

{{DEFAULTSORT:Kuznetsov Nk-25}}

Category:Low-bypass turbofan engines

Category:1970s turbofan engines

Category:Kuznetsov aircraft engines

Category:Three-spool turbofan engines