Input parameters
Blade radius (mm) From centre to tip, in mm Hub radius (mm) Width of rectangular section of blade root in mm
Number of blades   Root width (mm) From centre to edge of hub, in mm
Rated wind speed (m/s) The wind speed to use when calculating power Number of stations  
Tip Speed Ratio (TSR) The ratio of the tip speed to the wind speed Angle of attack (degrees) Angle of attack for optimun lift:drag ratio Profile name
Image size (pixels) The size of the diagrams Coeficient of lift (Cl) From airfoil data 6.0° Cl: 0.99543  Cl / Cd: 56.82
Show dots  
Swept area 3.14 m2 in square metres
Tip speed 50.0 m/s  
Rated RPM 477.5 rpm Revs per minute at rated wind speed
Torque (N/m) 21.94 / 21.27 ideal / linear
Power (Watts) 1097.1 / 1063.6 ideal / linear (3.06% loss)
Wake loss 0.0%  Loss factor for wake rotation
Tip loss 0.1%  Loss factor for tip effects
Drag loss 5.2%  Loss factor for drag effects
Max power (Watts) 1112.12 W according to the Betz limit
Total blade area 0.458 m2 Surface area of linear shape


Linearisation point 1  
Linearisation point 2  
Ignore linear from for chords
Ignore linear from for twists
 
 
Force RPM to -1 to use TSR


         Ideal blade  Using linear approx
  Station   Radius   Speed   Apparent wind   Reynolds   Attack   Setting   Chord   Reynolds   Attack   Setting   Chord   Setting err   Chord err   Cl / Cd
10 1000.0mm50.00 50.99m/s @ 7.6° 2.510e+8 6.0° 1.6° 74 mm 2.510e+8 6.0° 1.6° 74 mm -0.00° 0.0 mm 0.995 / 0.018 = 56.8
9 900.0mm45.00 46.10m/s @ 8.4° 2.513e+8 6.0° 2.4° 82 mm 2.688e+8 5.4° 3.1° 87 mm 0.64° 5.7 mm 0.942 / 0.017 = 56.0
8 800.0mm40.00 41.23m/s @ 9.5° 2.518e+8 6.0° 3.5° 92 mm 2.780e+8 4.9° 4.5° 101 mm 1.07° 9.5 mm 0.906 / 0.016 = 55.4
7 700.0mm35.00 36.40m/s @ 10.8° 2.525e+8 6.0° 4.8° 104 mm 2.785e+8 4.8° 6.0° 115 mm 1.21° 10.7 mm 0.893 / 0.016 = 55.1
6 600.0mm30.00 31.62m/s @ 12.5° 2.535e+8 6.0° 6.5° 120 mm 2.708e+8 5.1° 7.5° 128 mm 0.94° 8.2 mm 0.917 / 0.017 = 55.6
5 500.0mm25.00 26.93m/s @ 14.9° 2.550e+8 6.0° 8.9° 142 mm 2.550e+8 6.0° 8.9° 142 mm 0.00° 0.0 mm 0.995 / 0.018 = 56.8
4 400.0mm20.00 22.36m/s @ 18.4° 2.575e+8 6.0° 12.4° 173 mm 2.322e+8 8.0° 10.4° 156 mm -2.04° -17.0 mm 1.151 / 0.022 = 53.3
3 300.0mm15.00 18.03m/s @ 24.0° 2.615e+8 6.0° 18.0° 218 mm 2.036e+8 12.1° 11.9° 169 mm -6.10° -48.2 mm 1.167 / 0.044 = 26.2
2 200.0mm10.00 14.14m/s @ 33.7° 2.665e+8 6.0° 27.7° 283 mm 1.726e+8 20.4° 13.3° 183 mm -14.36° -99.7 mm 1.200 / 0.091 = 13.2


   Ideal blade  Using linear approx
  Station   Attack   Cl / Cd   Lift   Drag   Lift  rot   Drag rot   Nett rot   Torque   Power   Attack   Cl / Cd   Lift   Drag   Lift  rot   Drag rot   Nett rot   Torque   Power
10 6.0° 0.995 / 0.018 = 56.81585.22 27.90 209.51 -27.66 181.85 0.000 0.00 6.0° 0.995 / 0.018 = 56.81585.22 27.90 209.51 -27.66 181.85 0.000 0.00 
9 6.0° 0.995 / 0.018 = 56.81295.61 22.80 189.87 -22.56 167.31 1.290 64.52 5.4° 0.942 / 0.017 = 56.01226.55 21.91 179.75 -21.67 158.08 1.302 65.11 
8 6.0° 0.995 / 0.018 = 56.81036.49 18.24 170.40 -17.99 152.40 1.178 58.90 4.9° 0.906 / 0.016 = 55.4943.38 17.04 155.09 -16.81 138.29 1.188 59.39 
7 6.0° 0.995 / 0.018 = 56.8807.85 14.22 151.16 -13.97 137.19 1.062 53.12 4.8° 0.893 / 0.016 = 55.1724.97 13.15 135.65 -12.92 122.73 1.057 52.83 
6 6.0° 0.995 / 0.018 = 56.8609.70 10.73 132.26 -10.48 121.79 0.944 47.20 5.1° 0.917 / 0.017 = 55.6561.83 10.11 121.88 -9.87 112.01 0.928 46.39 
5 6.0° 0.995 / 0.018 = 56.8442.03 7.78 113.90 -7.52 106.38 0.823 41.15 6.0° 0.995 / 0.018 = 56.8442.03 7.78 113.90 -7.52 106.38 0.812 40.62 
4 6.0° 0.995 / 0.018 = 56.8304.85 5.37 96.40 -5.09 91.31 0.700 35.01 8.0° 1.151 / 0.022 = 53.3352.35 6.61 111.42 -6.27 105.16 0.709 35.44 
3 6.0° 0.995 / 0.018 = 56.8198.15 3.49 80.48 -3.19 77.29 0.576 28.79 12.1° 1.167 / 0.044 = 26.2232.26 8.85 94.33 -8.09 86.24 0.544 27.22 
2 6.0° 0.995 / 0.018 = 56.8121.94 2.15 67.64 -1.79 65.85 0.448 22.38 20.4° 1.200 / 0.091 = 13.2146.98 11.15 81.53 -9.28 72.25 0.349 17.46 
              Totals: 7.314 365.7              Totals: 7.090 354.5 
Lift rot: Component of lift force in plane of rotation
Drag rot: Component of drag force in plane of rotation
Nett rot: Nett force in plane of rotation
Torque and power are for the area from station to station+1

Note: This power data is not accurate as it does not take into account wake effects etc.

Generator characteristics: Gen 1 slope Gen 1 Y intercept Gen 2 slope Gen 2 Y intercept
Profile   X   Y
0  1.000 0.000
1  1.000 0.000
2  0.950 0.015
3  0.900 0.027
4  0.800 0.049
5  0.700 0.067
6  0.600 0.081
7  0.500 0.092
8  0.400 0.098
9  0.300 0.098
10  0.250 0.094
11  0.200 0.088
12  0.150 0.079
13  0.100 0.066
14  0.075 0.058
15  0.050 0.047
16  0.025 0.034
17  0.013 0.024
18  0.000 0.000
19  0.013 -0.014
20  0.025 -0.019
21  0.050 -0.025
22  0.075 -0.027
23  0.100 -0.029
24  0.150 -0.029
25  0.200 -0.027
26  0.250 -0.025
27  0.300 -0.023
28  0.400 -0.018
29  0.500 -0.014
30  0.600 -0.010
31  0.700 -0.006
32  0.800 -0.004
33  0.900 -0.002
34  0.950 -0.002
35  1.000 0.000