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Continue to ChatWatch this 18-rotor electric helicopter take its maiden voyage (video) https://www.digitalreviews.net/news/news-archives/watch-this-18-rotor-electric-helicopter-take-its-maiden-voyage-video/
Watch this 18-rotor electric helicopter take its maiden voyage (video) https://www.digitalreviews.net/news/news-archives/watch-this-18-rotor-electric-helicopter-take-its-maiden-voyage-video/