On May 16, Makani released a YouTube video. A camera pans on a T-shaped airplane, with wings stretching 85 feet holding eight small turbines and a tether connecting it to a tall ground station. The plane swoops into the air. It dips and soars, looping elegantly in circles that mimic a windmill, something it was built to replace.
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Alphabet's Green Energy Ambitions Hit Turbulence