Abstract: The propeller described herein may increase the pressure differential to be generated at/near a blade tip and, at least in some embodiments, to allow for the greatest pressure differential to be generated at/near the blade tip. Increasing the pressure differential in the blade tip region may promote formation of blade tip vortices when the propeller is in use. The propeller may utilize these blade tip vortices as effective mass flow, which can contribute to the thrust force generated by the propeller. That is, by designing the propeller to form and utilize blade tip vortices, the mass flow of air over the blades may be increased, thereby increasing the amount of thrust generated by the propeller.