 Modern large wind turbines achieve peak values for "C"p in the range of 0.45 to 0.50, about 75–85% of the theoretically possible maximum.In high wind speed, where the turbine is operating at its rated power, the turbine rotates (pitches) its blades to lower "C"p to protect itself from damage.The power in the wind increases by a factor of 8 from 12.5 to 25 m/s, so "C"p must fall accordingly, getting as low as 0.06 for winds of 25 m/s.