US Patent 10332394 Unmanned aerial vehicles and related methods and systems

Unmanned aerial vehicles and related methods and systems are disclosed. An example unmanned aerial vehicle, comprising: a body and a propulsion source to propel the unmanned aerial vehicle during flight; and a display carried by the unmanned aerial vehicle to display a message to coordinate traffic, the display actuatable between a deployed position to enable the message to be conveyed and a stowed position in which aerodynamics of the unmanned aerial vehicle are enhanced.