Eurojet EJ200

The Eurojet EJ200 is a military turbofan, used as the powerplant of the Eurofighter Typhoon. The engine is largely based on the Rolls-Royce XG-40 technology demonstrator which was developed in the 1980s. The EJ200 is built by the EuroJet Turbo GmbH consortium.

Development

Rolls-Royce XG-40

Rolls-Royce began development of the XG-40 technology demonstrator engine in 1984. [cite news |first=Michael|last=Donne |title=Rolls to develop engine for fighters |work=The Times |publisher=Times Newspapers |date=1984-03-05 |accessdate=2007-07-05 ] Development costs were met by the British government (85%) and Rolls-Royce.cite news |title=Rolls Readies Demonstrator Engine For European Fighter Aircraft|work= Aviation Week & Space Technology|publisher=McGraw-Hill |date=1986-06-23 |accessdate=2007-07-05 ]

On 2 August 1985, Italy, West Germany and the UK agreed to go ahead with the Eurofighter. The announcement of this agreement confirmed that France had chosen not to proceed as a member of the project. [cite news | first = Paul | last = Lewis | title = 3 European Countries Plan Jet Fighter Project. | work = The New York Times | publisher = The New York Times Company | page = 31 | date = 1985-08-03 | accessdate = 2006-12-19] One issue was French insistence that the aircraft be powered by the SNECMA M88, in development at the same time as the XG-40. [cite news |first=Michael |last=Donne |title=Why three into one will go; Europe's new combat aircraft |work=Financial Times|date= 1985-08-03|accessdate=2007-07-05 ]

Eurojet EJ200

The Eurojet consortium was formed in 1986 to co-ordinate and manage the project largely based on XG-40 technology. In common with the EJ200, the XG-40 has a three-stage fan with a high pressure ratio, five-stage low-aspect-ratio HP compressor with active tip-clearance control, a combustor using advanced cooling and thermal protection, and single-stage HP and LP turbines with PM discs and low-density single crystal blades." [cite news |title=Power to progress |url= |work=Flight International |publisher=Reed Business Publishing|date=1991-04-10|accessdate=2007-07-05]

In December 2006, Eurojet completed deliveries of the 363 EJ200s for the Tranche 1 Eurofighters. Tranche 2 aircraft require 519 EJ200s. [cite news |first=Julian |last=Moxon |title= |url= |work=Flight International |publisher=Reed Business Information |date=2007-05-01 |accessdate=2007-07-05] As of December 2006, Eurojet was contracted to produce a total of 1,400 engines for the Eurofighter project. [cite press release| title =EUROJET delivers all 363 Tranche 1 Engines to schedule|publisher =Eurojet GmbH | date =2006-12-22| url =http://www.eurojet.de/docs/EUROJET%20Press%20release_Tranche%201%20Engines_221206Final.pdf | format =PDF | accessdate =2007-07-05]

pecifications

jetspecs

type=Turbofan
length=157 inches (4.0 m)
diameter=29 inches (0.737 m)
weight=2,180 lbs (989 kg)
compressor=3-stage LP, 5-stage HP
combustion=
turbine=1-stage LP, 1-stage HP
fueltype=
oilsystem=
power=
thrust=13,500 lbf (60 kN) dry thrust / 20,000 lbf (90 kN) with reheat
compression=26:1
aircon=
turbinetemp=
fuelcon=
specfuelcon=21-23 g/kNs dry thrust / 47-49 g/kNs with reheat
power/weight=
thrust/weight=9.175:1

"Source: Rolls-Royce plc ( [http://www.rolls-royce.com/defence_aerospace/products/combat/ej200/tech.jsp EJ200 Engine Data Fact Sheet] [cite web| url=http://www.rolls-royce.com/defence_aerospace/downloads/combat/ej200.pdf |title =Rolls-Royce EJ200 Engine Data Fact Sheet |publisher =Rolls-Royce plc] )"

References

External links

* [http://www.eurojet.de Eurojet GmbH]
* [http://www.eurofighter.com/et_ss_tp_tp.asp www.eurofighter.com: EJ200]
* [http://www.rolls-royce.com/defence_aerospace/products/combat/ej200/default.jsp Rolls-Royce EJ200 Engine Data Fact Files]
* [http://www.eurofighter-typhoon.co.uk/Eurofighter/engines.html www.eurofighter-typhoon.co.uk (unofficial): EJ200 article]