A wind turbine blade for a wind turbine is a shell structure of a fiber-reinforced composite and comprises a root region and an airfoil region. The root region has a ring-shaped cross section and comprises a cylindrical insert 7 embedded in the fiber-reinforced polymer so as to substantially follow the circumference of the root region. The cylindrical insert is provided with a number of mutually spaced threaded bores 12, 15 in a first end 9 thereof being accessible from the outside.

A cleaning apparatus suitable for cleaning a horizontally curved metal tower can include a fluid directing channel configured to receive pressurized fluid from a fluid source; a slider or wheel positioned to contact and vertically traverse the horizontally curved metal tower; and a standoff which separates the fluid directing channel spatially from the slider or wheel. The apparatus can also include sprayer nozzles fluidly coupled to the fluid directing channel which can be directed toward or beyond the slider or wheel. A magnet can also be positioned on the apparatus that is configured to interact magnetically to pull the cleaning apparatus toward the horizontally curved metal tower, but the magnet is not close enough to touch the horizontally curved metal tower when the slider or wheel is in contact with the horizontally curved metal tower.

A thermal barrier attachment seal for a gas turbine engine component includes a spine having a first surface and a second surface facing opposite the first surface. A first layer of insulation is provided on the first surface. A second layer of insulation is provided on the second surface to provide a thermal barrier seal between a first gas turbine engine component and a second gas turbine engine component. A fan section for a gas turbine engine is also disclosed.

A component with a coating, wherein the component is a part of a wind turbine, the component is in contact with a lubricant and the lubricant comprises atomic hydrogen, is provided. The coating at least partly covers a surface of the component. The coating reduces diffusion of the atomic hydrogen into the component by a means of inducing a recombination of the atomic hydrogen to hydrogen gas. A method of reducing diffusion of atomic hydrogen into a component of a wind turbine by using such a coating is also provided.

A power generating wall design, which may include a plurality of turbines, such as wind turbines, arranged in a wall pattern and arranged to have an entrance flow on one side of the wall and an exit flow on another side of the wall. One exemplary embodiment of a power generating wall may incorporate wind turbines, and may be used in a high-wind environment, such as a highway. In another exemplary embodiment, a power generating wall may incorporate other types of turbines, such as water-driven turbines, and may be constructed in a location that is wholly or partially underwater, such as a river or tidal basin.

A lightning current transfer arrangement for a wind turbine is provided, to enable lightning current and electrostatic discharge current to be discharged from a first and a second part of the wind turbine being rotatable relative to each other. The lightning current transfer arrangement is arranged to provide electrical contact between the first and second parts, and has a current transfer unit electrically coupled to the first part, and an electrically conductive slideway electrically coupled to the second part, and rotatable relative to the current transfer unit. The current transfer unit further has a slider elastically biased towards the slideway, where the slider comprises a slide piece made of conductive plastics and contacting the slideway, and an electrode made of metal and directed towards the slideway, the electrode and the slide piece being rigidly coupled.

A rotor for use with an airborne wind turbine, wherein the rotor comprises a front flange, a can, a rear flange, and a rigid insert comprising a propeller mount, wherein the front flange, can, and rear flange comprise one of carbon fiber and spun aluminum, wherein a rear end of the front flange is attached to a front end of the can, and the rear flange is mounted to a rear end of the can, wherein the rigid insert is bonded to the front flange; and wherein the rigid insert comprises a tube that axially extends within the rotor to allow for the positioning of a driveshaft therethrough.

A lightning current transfer arrangement for a wind turbine enables lightning current and electrostatic discharge current to be discharged between first and second parts of the wind turbine that are rotatable relative to each other. The lightning current transfer arrangement comprises a current transfer unit electrically coupled to the first part, and an electrically conductive slideway electrically coupled to the second part and rotatable relative to the current transfer unit. The current transfer unit comprises a slider elastically biased towards the slideway, where the slider comprises a slide piece formed of a conductive plastic material, and a metal electrode rigidly coupled with the slide piece.

A rotor for use with an airborne wind turbine, wherein the rotor comprises a front flange, a can, a rear flange, and a rigid insert comprising a propeller mount, wherein the front flange, can, and rear flange comprise one of carbon fiber and spun aluminum, wherein a rear end of the front flange is attached to a front end of the can, and the rear flange is mounted to a rear end of the can, wherein the rigid insert is bonded to the front flange; and wherein the rigid insert comprises a tube that axially extends within the rotor to allow for the positioning of a driveshaft therethrough.

A wind turbine rotor blade with a rotor blade tip, a rotor blade root, and a rotor blade connection in the region of the rotor blade root with a rotationally symmetrical flange coupling is provided which has a first and a second end. The first end of the flange coupling has multiple bores for receiving fastening means for fastening to a hub of a wind turbine. The second end is fastened in or on material of the rotor blade root. The second end extends in the direction of an axis of rotation of the flange coupling.