Credit: Whisper Aero Whisper Aero has unveiled a prototype glider powered by its ... Whisper Tests Quiet Electric Ducted Fan On Modified Glider is published in Advanced Air Mobility Report ...

Whisper's chief innovation is its UltraQuiet WhisperDrive.It's an electric ducted fan.It's fairly small in diameter, and uses an unusually large number of strong, stiff blades, reinforced by a ...