The new Dornicr tunnel has now been put into service. The experimental chamber has an elliptical section, 3 by 4 metres, 7 metres long. Maximum wind velocity, 60 metres/sec. As regards local uniformity of velocity, static pressure, direction of flow and turbulence, the tunnel is up to the standards of good German and foreign research institutes. The measuring equipment at present comprises one three‐component and one six‐component balance.
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