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This paper describes a class of “powered lift” aircraft called volantors that utilize multiple ducted fans for generating thrust. Thrust is directed vertically for lift during vertical takeoff and landing and horizontally during cruise. The change in thrust direction is accomplished by partially rotating the ducted fans and partially redirecting the airflow at the duct exit through a series of variable camber vanes. This arrangement avoids the potential of duct leading edge stall during transition that arises if the thrust is re-directed solely by rotating the ducts through 90°. In addition to the above fundamental design arrangement this paper discusses the technical issues and developments that need to be addressed in order to provide a volantor that is practical enough for large scale personal use.

This paper describes those elements of a personalized airborne transportation system that are necessary and sufficient to make it usable in the future by a significant portion of the world's population. This system, which includes “powered lift aircraft” called volantors1 and the infrastructure in which they operate, must meet the user's personal needs while concurrently meeting societal needs as well.