Klimov VK-3

The Klimov VK-3 was the first Soviet afterburning bypass turbojet engine. Designed by S V Lyunevich at Klimov, at OKB-117 in 1949, this engine first ran in 1952, and was qualified at {{convert|5,730|kg|lb|0|abbr=on}} thrust (dry) and {{convert|8,440|kg|lb|0|abbr=on}} thrust (with afterburner) in 1954. The VK-3 was developed for the Mikoyan-Gurevich I-3 (I-380) and I-3U/I-5 (I-410) fighters. First flown in the I-3U in July 1956, the engine's performances was good but its reliability was poor. Even after modifications in December 1956 when newly designed compressor blades were installed, developmental problems continued, the program was ultimately canceled in January 1958. The engine was superseded by the Lyulka AL-7F, a less modern but more efficient engine.{{cite book|last1=Gordon|first1=Yefim|title=Red Star Vol.19 Soviet Heavy Interceptors|date=2004|publisher=Midland Publishing|location=4 Waitling Drive, Hinkley, LE10 3EY, England|isbn=1-85780-191-1}}

Design

The VK-3 is a single-shaft turbofan engine with a 10-stage axial compressor, an annular combustion chamber, a three-stage turbine, an afterburner and a variable supersonic nozzle. Bypass air is drawn from the second stage of the compressor to 12 external pipes and is directed into the turbine through an adjustable mixing valve, bypassing the combustion chamber. The 8th stage compressor has two position adjustable guide vanes.{{Cite web|url=http://www.secretprojects.co.uk/forum/index.php?topic=18248.0|title = Klimov VK-3 turbofan| date=28 July 2007 }}

Applications

Specifications

{{jetspecs

|ref=

|type=afterburning turbofan

|length=

|diameter=

|weight={{convert|1,850|kg|lb|0|abbr=on}}

|compressor=10 stage axial

|combustion=annular combustion chamber

|turbine=three-stage

|fueltype=

|oilsystem=

|power=

|thrust={{convert|5,730|kg|lb|0|abbr=on}} thrust (dry) and {{convert|8,440|kg|lb|0|abbr=on}} thrust (with afterburner)

|compression=

|bypass=

|aircon=

|turbinetemp=

|fuelcon=

|specfuelcon=

|power/weight=

|thrust/weight=4.56

}}

References

External links

{{cite web|title=Photo of a Klimov VK-3 engine|url=http://www.missiles.ru/_foto/Klimov_muz/IMG_7412.jpg|access-date=30 December 2015|archive-date=4 March 2016|archive-url=https://web.archive.org/web/20160304142121/http://www.missiles.ru/_foto/Klimov_muz/IMG_7412.jpg|url-status=dead}}

Category:1950s turbofan engines

Category:Low-bypass turbofan engines

Category:Klimov aircraft engines