The yaw drive is an important component of the horizontal axis wind turbines' yaw system. To ensure the wind turbine is producing the maximal amount of electric energy at all times, the yaw drive is used to keep the rotor facing into the wind as the wind direction changes. This only applies for wind turbines with a horizontal axis rotor. The wind turbine is said to have a yaw error if the rotor is not aligned to the wind. A yaw error implies that a lower share of the energy in the wind will be running through the rotor area. (The generated energy will be proportional the cosine of the yaw error).
Famous quotes containing the word drive:
“Certainly, words can be as abusive as any blow. . . . When a three-year-old yells, “You’re so stupid! What a dummy!” it doesn’t carry the same weight as when a mother yells those words to a child. . . . Even if you don’t physically abuse young children, you can still drive them nuts with your words.”
—Mary Kay Blakely (20th century)