Drone speed record falls again as Blackbird hits 453 mph using custom carbon fiber propellers

The Blackbird, built by the Drone Pro Hub duo, hit 730 km/h, or about 453.6 mph, during a downwind run on the second day of testing. Its return leg into heavy wind topped out at 640 km/h, giving the pair a two-way average of 685 km/h, or about 425.6 mph.

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