Patent ID: 8708273

Claim:
A vertical takeoff and landing aircraft comprising: a fuselage; three wings attached to the fuselage; six synchronously rotatable, thrust producing propulsion units located at approximately equal angular positions about a yaw axis of the aircraft; wherein one propulsion unit is mounted above, below, or on each half of the three wings, and each propulsion unit is independent from the other propulsion units, and wherein each rotatable propulsion unit comprises a propeller and a propeller hub, and wherein each propeller comprises: a plurality of blades, wherein each of the plurality of blades comprises a hole along a longitudinal axis of each blade; and a plurality of rotatable rods, wherein each of the plurality of rods extends into the hole of a corresponding one of the plurality of blades, wherein a proximal end of each of the plurality of blades is enclosed in or adjacent to the propeller hub and rotatable around the corresponding one of the plurality of rotatable rods, and wherein a distal end of each of the plurality of rods is fixed to a distal end of the corresponding one of the plurality of blades.