Airbus has cited clear air turbulence as the cause of an accident involving one of its solar-powered Zephyr high-altitude pseudo-satellite unmanned air systems in Australia. The Sept. 28 accident is the second this year involving a Zephyr at Wyndham Airport in Western Australia. A previous accident in April was linked to British defense ministry trials of the platform. In a statement, Airbus said the Zephyr encountered clear air turbulence during its ascent and the aircraft departed from ...


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