3) How do Fancraft™ solve the aerodynamic challenges of ‘ducted-fans‘?

'Ducted-fans' have three significant aerodynamic challenges:  a) stability, b) forward speed, and, c) efficiency.  UrbanAero's unique Fancraft™ technologies have not only successfully overcome these challenges but in the process have also generated unprecedented capabilities.
 
These three, principal enabling technologies are:
 
a) Stability: A “Vane Control System” (VCS), that is comprised of a cascade of vanes at both the inlet and outlet of the ducts that can be deflected either in unison (top and bottom) or differentially to generate either pure side force or pure rolling moment.  The vanes in these ducts (front and back) can also be deflected differentially to generate yaw.  The bottom line is that the VCS generates motion in six degrees of freedom entirely independent of one another.  This is a capability that is unprecedented in the history of aviation. For the first time, UA has created a vehicle that can move sideways without the need to roll and vice versa and any combination of roll and translation.  In addition, the VCS generates such a great amount of control power, at such high bandwidth that the vehicle can withstand gusts of up to 50 knots.  (US Patents # 6,464,166 and 6,817,570)
 
b) Forward Speed: Reconfigurable ducts are comprised of a set of louvers at the front of the forward duct and rear of the aft duct that open during forward flight to allow the incoming flow to move through the duct and thereby greatly reduce drag to enable forward speeds of 100-120 knots in contrast to a top speed of typically 40 knots in a conventional ducted-fan design. (US Patent # 7,806,362B2)
 
c) Efficiency: Close aerodynamic tailoring between the lift rotors and the fuselage whereby the fuselage itself functions as an airfoil and generates sufficient lift at high speed (in excess of 50% of what the aircraft requires) to be able to off-load 50% of the needed lift from the rotors, thereby vastly increasing efficiency and endurance.(US Patent # 7,806,362B2).