Wind turbine blade planforms with twisted and tapered tips

A blade for a wind turbine includes a total backward twist of between approximately 6 degrees and approximately 15 degrees between an outer approximately 1 percent to 10 percent of a rotor radius of the blade; and an approximate planform distribution within the following ranges r/R c/R(LE) c/R(TE) .96 0.60 to 0.65% −1.42 to −1.34% .968 0.54 to 0.59% −1.31 to −1.34% .974 0.39 to 0.58% −1.36 to −1.22% .9806 0.13 to 0.57% −1.45 to −1.06% .9856 −0.23 to 0.56% −1.56 to −0.74% .9906 −0.76 to 0.55% −1.74 to −0.24% .9956 −1.44 to 0.54% −1.99 to 0.23% 1.00 −2.17 to 0.54% −2.27 to 0.44% where "r/R" is an approximate normalized distance outward from a center of rotation of the blade along a span of the blade; and "c/R(LE)" and "c/R(TE)" are approximate relative positions of a leading (LE) and trailing edge (TE) of a chord "c" expressed as a percentage of a distance outward from the center of rotation at each r/R.