Whisper Aero tests its ultra-quiet electric propulsors in crewed flight theaircurrent.com/feed/dispatc... (via @elanhead.com) #staycurrent
theaircurrent.comWhisper Aero tests its ultra-quiet electric propulsors in crewed flightWhisper used a modified Swift 3 glider to test its electric ducted fans, marking its first flight tests with a human pilot on board.
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