An apparatus for extracting power includes a track and an airfoil coupled to the track. The track includes first and second elongate sections, where the first elongate section is positioned above the second elongate section. The airfoil is moveable in opposite directions when alternately coupled to the first elongate section and second elongate section.

An apparatus for extracting power includes a track and an airfoil coupled to the track. The track includes first and second elongate sections, where the first elongate section is positioned above the second elongate section. The airfoil is moveable in opposite directions when alternately coupled to the first elongate section and second elongate section.

Sail movement is achieved having rotation while revolving, using a simple structure that does not easily break. A sail device includes a supporting body, a sail body, a guide track comprising recessed portions, and engaging portions. Rotational energy is output from or input to a rotating body forming part of the supporting body. The sail body is attached to the supporting body which freely rotates, and revolves around an axis of the supporting body. The sail body converts fluid energy into rotational energy or converts rotational energy into fluid energy on the basis of the motion of the sail body which contacts a fluid. In the guide track, two recessed portions are continuous with one another, and form an endless track which defines an angle of rotation of the sail body during the process of revolving. The engaging portions engage the sail body with the guide track, and displace the sail body along the guide track.

Sail movement is achieved having rotation while revolving, using a simple structure that does not easily break. A sail device includes a supporting body, a sail body, a guide track comprising recessed portions, and engaging portions. Rotational energy is output from or input to a rotating body forming part of the supporting body. The sail body is attached to the supporting body which freely rotates, and revolves around an axis of the supporting body. The sail body converts fluid energy into rotational energy or converts rotational energy into fluid energy on the basis of the motion of the sail body which contacts a fluid. In the guide track, two recessed portions are continuous with one another, and form an endless track which defines an angle of rotation of the sail body during the process of revolving. The engaging portions engage the sail body with the guide track, and displace the sail body along the guide track.

The invention relates to the field of energy, in particular to devices converting wind energy into electricity. The wind energy conversion method into electrical energy consisting in that the wind energy is converted by means of receivers mounted on the casing of moving wind energy conversion modules, moving linearly along the guide belt, into movement energy of wind energy conversion modules and electric energy by means of electrical energy generating device, mounted on the casing. Wherein there is performing continuous control, depending on the external conditions of the total area of all wind energy receivers guided to the guide belt. In particular embodiments, there is performing continuous control, depending on the external conditions of setting angles of the wind energy receivers relative to the wind energy conversion modules, the movement speeds of the wind energy conversion modules, the aerodynamic profile, and the area of each wind energy receiver, for which it is preferable to use wings with a composite aerodynamic profile, including the main profile, and at least one tilt flap. Also the system for the method embodiment is claimed.

The invention relates to the field of energy, in particular to devices converting wind energy into electricity. The wind energy conversion method into electrical energy consisting in that the wind energy is converted by means of receivers mounted on the casing of moving wind energy conversion modules, moving linearly along the guide belt, into movement energy of wind energy conversion modules and electric energy by means of electrical energy generating device, mounted on the casing. Wherein there is performing continuous control, depending on the external conditions of the total area of all wind energy receivers guided to the guide belt. In particular embodiments, there is performing continuous control, depending on the external conditions of setting angles of the wind energy receivers relative to the wind energy conversion modules, the movement speeds of the wind energy conversion modules, the aerodynamic profile, and the area of each wind energy receiver, for which it is preferable to use wings with a composite aerodynamic profile, including the main profile, and at least one tilt flap. Also the system for the method embodiment is claimed.

The subject of the invention is an energy generating apparatus for utilizing the energy of a flow medium having a support structure (13), at least one waving element (1), at least two fastening elements (4), a drive and control unit (5), and an energy recovery and transfer unit (10), wherein the waving element (1) is connected to the fastening elements (4), the drive and control unit (5) is connected to the fastening elements (4). It is characterized in that it comprises at least one turbulizer element (2), the waving element (1) between two fastening elements (4) is described as a regular waveform, determined by a function, and comprises at most one full wave period. The subject of the invention also includes the method for application of the apparatus.

The subject of the invention is an energy generating apparatus for utilizing the energy of a flow medium having a support structure (13), at least one waving element (1), at least two fastening elements (4), a drive and control unit (5), and an energy recovery and transfer unit (10), wherein the waving element (1) is connected to the fastening elements (4), the drive and control unit (5) is connected to the fastening elements (4). It is characterized in that it comprises at least one turbulizer element (2), the waving element (1) between two fastening elements (4) is described as a regular waveform, determined by a function, and comprises at most one full wave period. The subject of the invention also includes the method for application of the apparatus.

Unmanned aircraft, comprising a first wing (11) and a second wing (12), wherein at least one of the first and second wings (11, 12) are made with a multiple element configuration comprising a set of wing profiles (21, 22, 23, 24) which are arranged at least partially in a condition of mutual proximity, said set of wing profiles comprising at least a first wing profile (21) and a second wing profile (22) which are mutually positioned one after the other and which define a leading edge and a trailing edge, respectively, wherein said first wing (11) and said second wing (12) are spaced with respect to each other; said aircraft further comprising interconnection supports (13, 14) between said first wing (11) and said second wing (12), holding said first and second wing (11, 12) at a given distance, said unmanned aircraft further comprising at least one aerodynamic container (40) positioned between said first wing (11) and said second wing (12), said aerodynamic container (40) comprising an inner compartment and a casing enclosing said inner compartment and being adapted and configured to carry a load and/or a central motor (50c).

Unmanned aircraft, comprising a first wing (11) and a second wing (12), wherein at least one of the first and second wings (11, 12) are made with a multiple element configuration comprising a set of wing profiles (21, 22, 23, 24) which are arranged at least partially in a condition of mutual proximity, said set of wing profiles comprising at least a first wing profile (21) and a second wing profile (22) which are mutually positioned one after the other and which define a leading edge and a trailing edge, respectively, wherein said first wing (11) and said second wing (12) are spaced with respect to each other; said aircraft further comprising interconnection supports (13, 14) between said first wing (11) and said second wing (12), holding said first and second wing (11, 12) at a given distance, said unmanned aircraft further comprising at least one aerodynamic container (40) positioned between said first wing (11) and said second wing (12), said aerodynamic container (40) comprising an inner compartment and a casing enclosing said inner compartment and being adapted and configured to carry a load and/or a central motor (50c).