BldComps:

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   Computes inflow velocity, blade Reynold's number and angle of attack
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   Form:
   [W, Reb, alpha] = BldComps( theta, Xu, Xd, V, Vpm, Ret )
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   Inputs
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   theta       (1,1)   Angle to wind
   Xu          (1,1)   Upwind tip-speed ratio
   Xd          (1,1)   Downwind tip-speed ratio
   V           (1,1)   Upwind induced velocity (m/s)
   Vpm         (1,1)   Downwind induced velocity (m/s)
   Ret         (1,1)   Wind turbine Reynold's number

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   Outputs
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   W           (1,1)   Relative inflow velocity
   Reb         (1,1)   Blade Reynold's number
   alpha       (1,1)   Angle of attack

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