In a rotating machine having a fluidic rotor, the rotor comprises at least one blade mounted on an arm rotating about a rotor shaft forming a main axis of the rotor, the rotor being kept by a supporting structure in an orientation such that said axis is substantially perpendicular to the direction of flow of the fluid, the blade being mounted so as to pivot about an axis of rotation of the blade parallel to the main axis. The machine comprises means for generating a relative oscillation movement of the blade with respect to the arm at the axis of rotation of the blade, in order in this way to vary the inclination of the blade during the rotation of the rotor. Said means comprise, at the arm end, a mechanism comprising a first rotating element (A; B) known as the drive element and a second rotating element (B; A) known as the driven element, the elements being mounted on mutually parallel axes of rotation and separated by an inter-axis distance, the orientation of the drive element being controlled depending on the orientation of the rotor shaft while the orientation of the driven element determines the orientation of the blade, one of the rotating elements comprising a finger (D) spaced apart from its axis of rotation and the other rotating element comprising a groove (C) which receives the finger and in which the finger can slide. Application notably to wind turbines, to marine turbines and to nautical and aircraft propellers.

In a rotating machine having a fluidic rotor, the rotor comprises at least one blade mounted on an arm rotating about a rotor shaft forming a main axis of the rotor, the rotor being kept by a supporting structure in an orientation such that said axis is substantially perpendicular to the direction of flow of the fluid, the blade being mounted so as to pivot about an axis of rotation of the blade parallel to the main axis. The machine comprises means for generating a relative oscillation movement of the blade with respect to the arm at the axis of rotation of the blade, in order in this way to vary the inclination of the blade during the rotation of the rotor. Said means comprise, at the arm end, a mechanism comprising a first rotating element (A; B) known as the drive element and a second rotating element (B; A) known as the driven element, the elements being mounted on mutually parallel axes of rotation and separated by an inter-axis distance, the orientation of the drive element being controlled depending on the orientation of the rotor shaft while the orientation of the driven element determines the orientation of the blade, one of the rotating elements comprising a finger (D) spaced apart from its axis of rotation and the other rotating element comprising a groove (C) which receives the finger and in which the finger can slide. Application notably to wind turbines, to marine turbines and to nautical and aircraft propellers.

A rotating machine with a fluid rotor comprises a set of blades (4) mounted on arms (2) rotating about a main axis (1) of the rotor, the rotor being held by a support structure (5) in an orientation such that said axis (1) is essentially perpendicular to the direction of the flow of fluid, each blade (4) being mounted pivoting about a respective axis of rotation (3) parallel to the main axis (1), the machine comprising a linkage (13, 7, 14) for generating a relative rotational movement of each blade (4) relative to the arm (2) of same at the axis of rotation (3) thereof, in order to thus vary the tilt of the blade relative to the flow of fluid in an angular range. According to the invention, the machine comprises means for collectively modifying the geometry of the linkages (13, 7, 14) from a movement generated at the main axis of the rotor in order to vary the amplitude of the angular range.

A rotating machine with a fluid rotor comprises a set of blades (4) mounted on arms (2) rotating about a main axis (1) of the rotor, the rotor being held by a support structure (5) in an orientation such that said axis (1) is essentially perpendicular to the direction of the flow of fluid, each blade (4) being mounted pivoting about a respective axis of rotation (3) parallel to the main axis (1), the machine comprising a linkage (13, 7, 14) for generating a relative rotational movement of each blade (4) relative to the arm (2) of same at the axis of rotation (3) thereof, in order to thus vary the tilt of the blade relative to the flow of fluid in an angular range. According to the invention, the machine comprises means for collectively modifying the geometry of the linkages (13, 7, 14) from a movement generated at the main axis of the rotor in order to vary the amplitude of the angular range.

A blade is provided for the cycloidal marine propellers or cycloidal aerial rotors. Said blade is provided with the capabilities, in response to the control system commands to dynamically and in real time; vary its relative pivot point position, change its planform by extending or retracting a trailing edge extension, differentially if needed on the right and left, turn the flap along the trailing edge in either direction or allow it to be turned by the flows. Said blade is also optionally provided with one or more elastic trailing edges whose stiffness is dynamically, and possibly differentially along the blade span, variable by the control system. For the reversal of the leading and trailing edges for operation in reverse airflow and other conditions the blades are provided with edges that can be made rigid when functioning as the leading edge and flexible if needed when functioning as the trailing edge. Also the blades are provided with the capability of varying their cross-sectional profile thickness and reshaping it. Finally the blades are given on command flow permeability along much of their surface. These capabilities will enable each control system controlled blade to continually optimally adjust to and make the best use of its immediate operating environment as it travels along its trajectory within each revolution.

A blade is provided for the cycloidal marine propellers or cycloidal aerial rotors. Said blade is provided with the capabilities, in response to the control system commands to dynamically and in real time; vary its relative pivot point position, change its planform by extending or retracting a trailing edge extension, differentially if needed on the right and left, turn the flap along the trailing edge in either direction or allow it to be turned by the flows. Said blade is also optionally provided with one or more elastic trailing edges whose stiffness is dynamically, and possibly differentially along the blade span, variable by the control system. For the reversal of the leading and trailing edges for operation in reverse airflow and other conditions the blades are provided with edges that can be made rigid when functioning as the leading edge and flexible if needed when functioning as the trailing edge. Also the blades are provided with the capability of varying their cross-sectional profile thickness and reshaping it. Finally the blades are given on command flow permeability along much of their surface. These capabilities will enable each control system controlled blade to continually optimally adjust to and make the best use of its immediate operating environment as it travels along its trajectory within each revolution.

Underwater vehicles capable of self-propulsion are described. An underwater vehicle includes a cross-flow turbine including two or more foils spaced apart from a main shaft. The foils have a pitch that is adjustable under control of a pitch control mechanism. The underwater vehicle also includes a frame supporting the main shaft. The frame enables rotation of the cross-flow turbine. The underwater vehicle additionally includes a generator-motor set including rotor and stator elements. The rotor element is in rotary communication with the main shaft.

Underwater vehicles capable of self-propulsion are described. An underwater vehicle includes a cross-flow turbine including two or more foils spaced apart from a main shaft. The foils have a pitch that is adjustable under control of a pitch control mechanism. The underwater vehicle also includes a frame supporting the main shaft. The frame enables rotation of the cross-flow turbine. The underwater vehicle additionally includes a generator-motor set including rotor and stator elements. The rotor element is in rotary communication with the main shaft.

A blade for the cycloidal marine propellers or cycloidal aerial rotors operative, in response to control system commands, to dynamically; flex along its chord, vary its relative pivot point position, change its planform by extending or retracting a trailing edge extension, differentially, turn the flap along the trailing edge in either direction or allow it to be turned by the flows. For the reversal of the leading and trailing edges for operation in reverse airflow and other conditions the blades are provided with edges that can be made rigid when functioning as the leading edge and flexible if needed when functioning as the trailing edge. Also, the blades are configured to vary and reshape their cross-sectional profile thickness. Finally, the blades are given on command flow permeability along much of their surface.

A blade for the cycloidal marine propellers or cycloidal aerial rotors operative, in response to control system commands, to dynamically; flex along its chord, vary its relative pivot point position, change its planform by extending or retracting a trailing edge extension, differentially, turn the flap along the trailing edge in either direction or allow it to be turned by the flows. For the reversal of the leading and trailing edges for operation in reverse airflow and other conditions the blades are provided with edges that can be made rigid when functioning as the leading edge and flexible if needed when functioning as the trailing edge. Also, the blades are configured to vary and reshape their cross-sectional profile thickness. Finally, the blades are given on command flow permeability along much of their surface.