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The wind is coming from the z-direction at 12 m/s which is a typical rated wind speed for a turbine this size. This incoming flow makes the blade rotate at an angular velocity of -2.22 rad/s about the z-axis (the blade is thus spinning clockwise when looking at it from the front, like most real wind turbines).  This blade therefore has a tip speed ratio, which is the ratio of tip velocity to incoming wind, of 8 (also a typical value)The blade root is offset from the axis of rotation by 1 meter to make it more represenetative of an actual turbine where the blades would connect to the hub. Note that the blade root is offset from the axis of rotation by 1 meter to represent the blade being connected to a hub. 

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