Methods and apparatus for generating electrical power on aircraft rotor heads are disclosed. The apparatus includes a rotor assembly and a stator assembly. The rotor assembly is rigidly coupled to a rotor head of an aircraft. The rotor assembly is to rotate at a first rate as the rotor head rotates at the first rate. The stator assembly is rotatably coupled to the rotor assembly. The stator assembly includes a stabilizer to aerodynamically resist rotation of the stator assembly. The stabilizer is to cause the stator assembly to rotate at a second rate less than the first rate.

Faired tethers with internal support structures providing support to strength cores, and systems therewith, are described. The faired tethers include one or more electrical conductors and one or more rigid supports that inhibit movement of a strength core within a faired tether.

A method of using a bagged power generation system comprising windbags and waterbags integrated with drones and adapting drone technologies for harnessing wind and water power to produce electricity. An extremely scalable and environmentally friendly method, system, apparatus, equipment, techniques and ecosystem configured to produce renewable green energy with high productivity and efficiency.

A tether guide system operable through a wide range of tether/fleeting angles while causing minimal wear to the tether. The tether guide system may include a series of rollers arranged in a curved path. Also disclosed are tether guides with a sliding belt, a guide surface, or a guide wheel, all for use in the disclosed tether guide system.

A drone with its own power generating function is introduced. The drone includes a central body, a battery attached to the bottom of the central body, multiple arms extended from the central body radially, drive rotors to be fitted on the top of the arms, a ring-shaped subsidiary guide positioned below the arms and supported by the multiple arms and multiple 1st generators arranged in parallel to the drive rotors on the subsidiary guide

An emergency wind turbine system for an aircraft including an outer structure in which an opening is made includes an emergency wind turbine including: a mast; a turbine including a body mounted on the mast that rotates about an axis of rotation, and a single blade or two blades extending radially from the body between a blade root and a blade head; a locking device to lock rotation of the turbine body about the axis of rotation, when the emergency wind turbine moves between retracted and deployed positions, such that the blade root axis forms an acute locking angle with an orthogonal projection of the longitudinal axis of the mast over a plane substantially perpendicular to the axis of rotation of the turbine and in which the blade root axis extends, to reduce the volume swept by the turbine when it moves between the retracted and deployed positions.

An apparatus, including a vertex rotor. The apparatus includes a transmission system, with the transmission system connected to the vertex rotor. The apparatus includes a drive shaft, with the drive shaft connected to the transmission system. The apparatus includes a first bevel gear and a second bevel gear. The first bevel gear and the second bevel gear are connected to the drive shaft;

Methods and apparatus to harvest renewable energy are provided herein. In some embodiments, a wind-powered aircraft includes an airframe suitable for untethered flight in an open airspace; and an airborne kinetic energy conversion system attached to the airframe, the airborne kinetic energy conversion system comprising a turbine, a generator connected to the turbine, and an energy storage means connected to the generator.

A system which includes a stoppable rotor which is configured to launch a stopped rotor aircraft into flight. The system also includes one or more wind turbines which are configured to generate electricity while the stopped rotor aircraft is flying, where the stoppable rotor is stopped at least some of the time while electricity is generated.

A system for starting the flight of power wing airfoils, in particular for a wind generator, comprising at least one wing profile, operatively connected through control tie-rods, to winches or other control mechanisms of a flight of such wing profile, and at least one autonomous transporting flying vector adapted to be connected through disengageable connecting means to at least one wing profile and to transport in flight such wing profile. A process is further described, for starting the flight of such power wing airfoils through such system.