I am wondering if combining a centrifugal blower impeller with an Archimedes screw impeller would create a hybrid impeller that would create enough thrust to lift up a VTOL aircraft.
Please reference the drawing below.
The drawing is showing a cross-sectional view of a centrifugal blower impeller located at the top with an Archimedes screw impeller inside of the pipe which extends down from the centrifugal blower impeller. The blades of the Archimedes screw impeller would be welded to the pipe so there will be no gap between the blades and the pipe.
This hybrid impeller would rotate so that the Archimedes screw blades would be trying to push air downward towards the opening of the pipe, yet air will not flow in this direction because the centrifugal blower impeller is pulling air upwards towards itself. I believe that the air friction and pressure against the blades from the fast moving air flowing upwards should create enough lift to lift up a VTOL aircraft. I think carbon fiber would be the ideal material to use to build this hybrid impeller.
Would this hybrid impeller design create enough thrust for a VTOL aircraft?
Perhaps replacing the Archimedes screw impeller with an axial multi-wing type impeller would be a better design? Less weight and more thrust/lift?
Its rotation direction would be the same as with the Archimedes screw impeller, in which its blades are trying to push air downwards while air is flowing upwards due to the suction of the centrifugal blower impeller.