Engineers have long dreamed of the arrival of personal flying machines-vehicles that let you soar above the treetops. But their debut may be delayed further still, after high winds grounded… Click to show full abstract
Engineers have long dreamed of the arrival of personal flying machines-vehicles that let you soar above the treetops. But their debut may be delayed further still, after high winds grounded a batch of flyers competing for the US $1 million GoFly prize.
               
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