The airfoil-rotor apparatus as claimed in claim 1 wherein an angle is subtended by the at least one arcuate recess relative to a center or planar rotation of an associated at least one rotor and said angle is substantially less than 180 degrees.Ĥ. The airfoil-rotor apparatus as claimed in claim 1 wherein the angle of planar rotation incline relative to the plane of the first wing is adjustable in a plane perpendicular to the plane of the first wing.ģ. An airfoil-rotor apparatus comprising: a first wing having a leading edge, a trailing edge and a plane of the first wing interposed between a top side and a bottom side of the first wing wherein, in the plane of the first wing, the first wing has at least one arcuate recess having a chord co-linear with the trailing edge of the first wing and at least one rotor having a plurality blades, a center of planar rotation and an angle of planar rotation incline relative to the plane of the first wing wherein each of the plurality of blades has a pitch angle and a tip distal from the center of planar rotation and wherein the at least one rotor is positioned so that rotations of the plurality of blades about the center of planar rotation cause the rotor blade tips turning in an air flow to pass proximate to the at least one arcuate recess forward of the trailing edge of the first wing and wherein the center of planar rotation is aft of the chord co-linear with the trailing edge of the first wing.Ģ. Vanes of an impeller for axial flow propeller pumpsġ. Propeller-rotor high lift system for aircraft Means and method of rotor augmented lift for airplanes Tail rotor arrangement with increased thrust for rotary wing aircraft and device for increasing the thrust of such an arrangement Tail rotor anti-torque system for a helicopter
![high lift airfoil high lift airfoil](https://i.ytimg.com/vi/rOnHCK58u-Y/maxresdefault.jpg)
Tip vortex generation technology for creating a lift enhancing and drag reducing upwash effect Unmanned multi-mode vertical take off and landing aircraft Unmanned aerial vehicle with counter-rotating ducted rotors and shrouded pusher-prop Vertical/short take-off and landing aircraft
![high lift airfoil high lift airfoil](http://airfoiltools.com/images/airfoil/e423-il_l.png)
Counter rotating ducted fan flying vehicleĬounter rotating circular wing for aircraft