Eurojet EJ200

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Eurojet EJ200s
Eurojet EJ200s

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, the partner companies of which are Rolls-Royce plc, Avio of Italy, ITP of Spain and MTU Aero Engines of Germany.

Contents

[edit] Development

[edit] Rolls-Royce XG-40

Rolls-Royce began development of the XG-40 technology demonstrator engine in 1984.[1] Development costs were met by the British government (85%) and Rolls-Royce.[2]

In Turin 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.[3] One issue was French insistence that the aircraft be powered by the SNECMA M88, in development at the same time as the XG-40.[4]

[edit] 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."[5]

The technology of the EJ200 makes it both smaller and simpler in layout than previous powerplants while giving it lower fuel consumption and a higher power-to-weight ratio, thus enhancing the multi-mission performance and effectiveness of combat aircraft.

In December 2006 Eurojet GmbH completed deliveries of the 363 EJ200s for the Tranche 1 Eurofighters. Tranche 2 aircraft require 519 EJ200s.[6] As of December 2006 Eurojet was contracted to produce a total of 1,400 engines for the Eurofighter project.[7]

[edit] Eurojet GmbH

Eurofighter GmbH was formed in 1986 to manage the development, production, support, maintenance, support and sales of the EJ200.[8] The original partners were Rolls-Royce, MTU, Fiat and Sener. Fiat's aircraft engine division was demerged and is now Avio. Sener's aircraft engine division is now ITP, with ownership split between Sener and Rolls-Royce.

Table 1 Eurojet GmbH organisation[9]
Partner company Development share Production share Responsibilities
Rolls-Royce 33% 34.5% Combustion system, High pressure turbine and engine health monitoring system.
MTU Aero Engines 33% 30% Low pressure and high-pressure compressors, system design responsibility for the Digital Engine Control and Monitoring Unit
Avio 21% 19.5% Low-pressure turbine, reheat system, gearbox and air/oil system.
ITP 13% 16% Exhaust nozzles, jet pipe, exhaust diffuser, by-pass duct and external dressings.

[edit] Specifications

General characteristics

  • Type: Turbofan
  • Length: 157 inches (4.0 m)
  • Diameter: 29 inches (0.737 m)
  • Dry weight: 2,180 lbs (989 kg)

Components

  • Compressor: 3-stage LP, 5-stage HP
  • Turbine: 1-stage LP, 1-stage HP

Performance

Source: Rolls-Royce plc (EJ200 Engine Data Fact Sheet[10])

[edit] References

  1. ^ Donne, Michael. "Rolls to develop engine for fighters", The Times, Times Newspapers, 1984-03-05. Retrieved on 2007-07-05. 
  2. ^ "Rolls Readies Demonstrator Engine For European Fighter Aircraft", Aviation Week & Space Technology, McGraw-Hill, 1986-06-23. Retrieved on 2007-07-05. 
  3. ^ Lewis, Paul. "3 European Countries Plan Jet Fighter Project.", The New York Times, The New York Times Company, 1985-08-03, p. 31. Retrieved on 2006-12-19. 
  4. ^ Donne, Michael. "Why three into one will go; Europe's new combat aircraft", Financial Times, 1985-08-03. Retrieved on 2007-07-05. 
  5. ^ "Power to progress", Flight International, Reed Business Publishing, 1991-04-10. Retrieved on 2007-07-05. 
  6. ^ Template error: argument title is required. 
  7. ^ Eurojet GmbH (2006-12-22). "EUROJET delivers all 363 Tranche 1 Engines to schedule" (PDF). Press release. Retrieved on 2007-07-05.
  8. ^ Eurojet: Company profile. www.eurojet.de. Retrieved on 2007-07-05.
  9. ^ Eurojet: Workshare www.eurojet.de. Retrieved on 5 July 2007.
  10. ^ Rolls-Royce EJ200 Engine Data Fact Sheet. Rolls-Royce plc.

[edit] External links

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