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Wind power



		%

P = 0.5 × ρ × A × V³ × C_p

P	= wind power [W]
r	= blade length [m]
ρ	= air density = 1.2255 kg/m³
A	= area = π × r² [m²]
V	= wind speed [m/s]
C_p	= power efficiency (max 59%)

Station averages

nan mph

Blade length	Efficiency
Blade length	5 %	10 %	15 %	20 %	25 %	30 %	35 %	40 %	45 %	50 %
0 m (0 ft)
1 m (3 ft)
2 m (7 ft)
3 m (10 ft)
4 m (13 ft)
5 m (16 ft)
6 m (20 ft)
7 m (23 ft)
8 m (26 ft)
9 m (30 ft)
10 m (33 ft)
11 m (36 ft)
12 m (39 ft)
13 m (43 ft)
14 m (46 ft)
15 m (49 ft)
16 m (52 ft)
17 m (56 ft)
18 m (59 ft)
19 m (62 ft)
20 m (66 ft)
21 m (69 ft)
22 m (72 ft)
23 m (75 ft)
24 m (79 ft)
25 m (82 ft)
26 m (85 ft)
27 m (89 ft)
28 m (92 ft)
29 m (95 ft)
30 m (98 ft)
31 m (102 ft)
32 m (105 ft)
33 m (108 ft)
34 m (112 ft)
35 m (115 ft)
36 m (118 ft)
37 m (121 ft)
38 m (125 ft)
39 m (128 ft)
40 m (131 ft)
41 m (135 ft)
42 m (138 ft)
43 m (141 ft)
44 m (144 ft)
45 m (148 ft)
46 m (151 ft)
47 m (154 ft)
48 m (157 ft)
49 m (161 ft)
50 m (164 ft)
51 m (167 ft)
52 m (171 ft)
53 m (174 ft)
54 m (177 ft)
55 m (180 ft)
56 m (184 ft)
57 m (187 ft)
58 m (190 ft)
59 m (194 ft)
60 m (197 ft)
61 m (200 ft)
62 m (203 ft)
63 m (207 ft)
64 m (210 ft)
65 m (213 ft)
66 m (217 ft)
67 m (220 ft)
68 m (223 ft)
69 m (226 ft)
70 m (230 ft)
71 m (233 ft)
72 m (236 ft)
73 m (240 ft)
74 m (243 ft)
75 m (246 ft)
76 m (249 ft)
77 m (253 ft)
78 m (256 ft)
79 m (259 ft)
80 m (262 ft)
81 m (266 ft)
82 m (269 ft)
83 m (272 ft)
84 m (276 ft)
85 m (279 ft)
86 m (282 ft)
87 m (285 ft)
88 m (289 ft)
89 m (292 ft)
90 m (295 ft)
91 m (299 ft)
92 m (302 ft)
93 m (305 ft)
94 m (308 ft)
95 m (312 ft)
96 m (315 ft)
97 m (318 ft)
98 m (322 ft)
99 m (325 ft)