Heli-Expo 2012: Austrian firm patenting low-noise blade tip
An Austrian helicopter operator is unveiling a blade tip design that its designer claims reduces both noise and improves performance at Heli-Expo 2012 in Dallas.
Walter Enthammer, owner and manager of Salzburg-based Helios Hubchrauber GmbH, has been working on the project known as the SilentEcoWing since 1995. The design aims to reduce the induced drag on the tip of a rotor blade by splitting the airflow from one large vortex into several small vortices.
Enthammer claims that this not only reduces induced drag but also helps to improve performance by making the blades more efficient. Enthammer says that wind tunnel
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