Yaw control device for a wind turbine

A yaw control device for a wind turbine, comprising:

• a vertical shaft;
• a vertical wing having a leading edge, a trailing edge, a first wing surface and a second wing surface, wherein the first wing surface extends between a first edge of the leading edge to a first edge of the trailing edge and wherein the second wing surface extends between a second edge of the leading edge to a second edge of the trailing edge;
• and
• at least one rotor blade disposed toward the trailing edge of the vertical wing;
• wherein the vertical wing is configured to receive the vertical shaft, and wherein the vertical shaft is biased toward the leading edge of the vertical wing, and wherein a majority of a surface area and mass of the vertical wing are biased toward the trailing edge of the vertical wing;
• and
• wherein the vertical wing is adapted to rotate about a longitudinal axis of the vertical shaft when a wind approaches from a direction such that the leading-edge faces in the direction of the approaching wind;
• and wherein the at least one rotor blade is a plurality of rotor blades, wherein the plurality of rotor blades is connected to the trailing edge of the vertical wing.