European Transonic Windtunnel GmbH
Civil Aviation
ETW is the most advanced aerospace wind-tunnel test facility in the world. By applying cryogenic temperature operation, ETW is capable of simulating actual high-lift and high-speed flight conditions of modern transport aircraft, achieving real-flight Mach and Reynolds numbers. What this tunnel stands out for is its ability to match the respective flight-relevant Reynolds numbers, a key feature which cannot be done in conventional wind tunnels at ambient temperature levels.
ETW - European Transonic Windtunnel GmbH
Ernst-Mach-Str, 51147 Köln, Gemany
  • English
  • German

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Company profile

The European Transonic Windtunnel (ETW) is the worldwide leading wind tunnel for testing aircraft in model scale at real flight conditions. It was designed and constructed by France, Germany, Great Britain and The Netherlands, and is operated based on a non-profit policy by the ETW GmbH. Aircraft performance and their flight envelope limits can be accurately determined with unique quality at ETW long before flight testing of a first prototype. Researchers and manufacturers from all over the world take advantage of this facility enhancing the performance, economic viability, and environmental friendliness of future aircraft.

Employees: 34

Annual sales last year: €10 million


High-/Flight-Reynolds Number Wind-Tunnel Testing:

ETW offers experimental wind-tunnel investigations focussing on aerodynamic and aeroelastic measurements on lifting bodies in the subsonic, transonic or supersonic speed range up to Mach-numbers of 1.35. Cryogenic operations allow for an accurate simulation of flow effects at high Reynolds-numbers of up to 90 Million. Beside classic measurements of forces, moments and pressures additional techniques are available for analyses of the origination and development of aerodynamic processes. Non intrusive techniques, e.g. SPT, TSP, PIV, microphone array technique, are applicable on demand.

Pilot-ETW Wind-Tunnel Testing:
A small cryogenic wind tunnel scaled 1:8.8 compared with ETW is additionally available for basic investigations as well as for the development or adaptation of new techniques for operation under cryogenic conditions.


References and export activities
Airbus, Boeing, Bombardier, Dassault, Gulfstream and other non-disclosed Clients.

Target group
Airframers and designers of business jets, commercial and military aircraft.

Aerodynamic, aeroelastic, aeroacoustic researchers requiring flight-relevant Mach- and Reynolds-similarity under lab conditions.

Competitive advantages
ETW provides exclusive risk mitigation, enabling airframers to “design for flight Reynolds numbers” for more competitive products featuring higher fuel efficiency, lighter structures, more payload and less noise.
ETW allows researchers to perform investigations in model scale at flight-relevant conditions.

Purpose of participation in project
ETW would like to expand its cooperation with Embraer, and aims for joint mutually beneficial applied research activities to enhance ETW's capabilities and increase its exploitation and usage by Embraer.

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