An unmanned aerial vehicle (UAV) comprises a flight control system and an electromechanical system directed by the flight control system. The flight control system is configured to track a position of a beacon that is in motion and monitor a difference between an actual position of the unmanned aerial vehicle and a desired position of the unmanned aerial vehicle relative to the position of the beacon. The flight control system configures one or more flight objectives based on one or more factors comprising whether the difference between the actual position and the desired position exceeds a threshold, wherein the flight objectives comprise a velocity objective and a position objective. The flight control system also commands the electromechanical system based at least on the one or more flight objectives.

A power transmission system for a propeller hub of an aircraft is described, wherein the power transmission system comprises a hollow inner conductive cylinder configured to be mounted to a rotatable shaft a hollow outer insulating cylinder concentric with the inner conductive cylinder, wherein at least a portion of the outer insulating cylinder is located radially outwardly of the inner conductive cylinder, a conductive element positioned at a first end surface of the outer insulating cylinder, wherein the outer insulating cylinder comprises a bore extending radially outwardly from an inner diameter to an outer diameter of the outer insulating cylinder to house a conductive rod for connecting the inner conductive cylinder to a first electrical terminal; wherein the conductive element is configured to be connectable to a second electrical terminal. An aircraft, such as a UAV, comprising the power transmission is also described.