European Transonic Wind Tunnel

ETW was constructed and is operated by the four European countries France, Germany, Great Britain and the Netherlands.

The tunnel parameters are as follows: Optical access to the test section for various cameras and light sources is provided through 90 special windows in all walls.

[2] ETW has a closed aerodynamic circuit contained inside an internally insulated stainless steel pressure shell.

The corresponding gaseous nitrogen exhaust is located in the other short leg of the circuit upstream of the stilling chamber and is controlled by valves to maintain constant pressure inside the tunnel.

[3] Test section details: An exchangeable model cart system is present to increase the productivity.