Patent ID: 8408877

Claim:
A blade for a wind turbine, comprising: a total backward twist of between approximately 6 and approximately 15 degrees between an outer approximately 1 percent to approximately 10 percent of a rotor radius of the blade; wherein the total backward twist is between approximately 6 and approximately 10 degrees between the outer approximately 1 percent to approximately 10 percent of the blade rotor radius; and wherein the total backward twist is between approximately 6 degrees and approximately 10 degrees between the outer approximately 1 percent to approximately 5 percent of the blade rotor radius; having the following tip twist distribution r/R θ .960 −1.63 .967 −0.76 .974 0.99 .981 2.98 .986 4.40 .991 5.53 .996 6.17 wherein “r/R” is an approximate normalized distance outward from a center of rotation of blade along the blade span, and θ is an approximate angle of the twist in degrees.