Abstract: An underwater power plant for arrangement in a water current includes at least two rotatable stations and at least one endless traction member connected to the rotatable stations. The at least one endless traction member is configured to rotate the at least two rotatable stations as the endless traction member moves in its lengthwise direction. At least one asymmetric foil is connected to the at least one endless traction member and configured to move the endless traction member in its lengthwise direction as the water current impacts the asymmetric foil. The at least one asymmetric foil has an upper camber side and a lower camber side. The upper camber side is facing in a direction outwards of the at least one endless traction member and the lower camber side is facing in a direction inwards of the at least one endless traction member.

Abstract: A method is for exploiting the energy of a water current with an energy plant. The energy plant has at least one rope extending around at least two turning stations, and carries at least one at least partially submerged foil which is approximately symmetrical around its chord. The velocity and direction of flow of the water together with the moving speed and direction of the foil gives a resulting water velocity and direction acting on the foil. The method includes pivoting the foil until it has a desired angle of attack to the resulting water direction when the foil is being displaced co-currently; and pivoting the foil until it has a desired angle of attack to the resulting water direction when the foil is being displaced counter-currently, the angle of attack being the same or different co-currently and counter-currently.

Abstract: A device is of a self-adjusting foil suspension in which a foil is placed in a fluid flow, typically a tidal flow. The foil is rotatable around a rotational axis, and the foil is connected by means of an arm to a track. The arm is rotatable around the rotational axis and rotatably connected to the track around a suspension axis at a radial distance from the rotational axis, the suspension axis being parallel to the rotational axis.

Abstract: A wave power plant is disclosed which has one or more foils that are pivotally movable about a body. The foil is set into an oscillating, pivotal motion about the body by the force of the waves. A power engine is mounted between the body and the foil and extract works as the foil pivots about the body. The foil and body are held submerged below the surface of the water to reduce the effects of extreme weather conditions on the structural components.

Abstract: A wave power plant is disclosed which has one or more foils that are pivotally movable about a body. The foil is set into an oscillating, pivotal motion about the body by the force of the waves. A power engine is mounted between the body and the foil and extract works as the foil pivots about the body. The foil and body are held submerged below the surface of the water to reduce the effects of extreme weather conditions on the structural components.