Drones are very stable, easy to fly, can carry very large payloads, BUT they are inefficient. This podcast goes through how having more than one rotor can create interference and reduce a drone's efficiency.
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Paper: https://www.mdpi.com/1424-8220/20/12/3360, Licensed under creative commons: https://creativecommons.org/licenses/by/4.0/
#CFD #Aerodynamics #Aero #Drone #multirotor #DroneEfficiency #DroneLift #DroneThrust #Lift