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This V-shaped drone runs on two silent propellers instead of four noisy ones - Yanko Design | Drone, V shape, Best graphics
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Reykjavik-based Flygildi raises an angel round to market its silent, bird-like drone overseas | EU-Startups
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Undefined Technologies Shares New Footage of Its Silent Drone That Generates Only 70 DB - autoevolution
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Is THIS the 'Tic Tac' UFO pilots are seeing? Advanced drones that can fly silently 'without any signs of propulsion' may be behind mystery sightings, experts say | Daily Mail Online
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