Swept area
The Rutland FM 910-3 has a blade diameter of 0.91 metres. This means it has a swept area, or capture area of 0.65 square metres. This is all important when comparing wind turbines, since it directly relates to the amount of passing wind energy
the turbine blades can intercept.
Rutland FM 910-3 power output curve
The graph below shows the power produced (in watts) for the Rutland FM 910-3 at different wind speeds, based on
data supplied by the manufacturer.
The green line shows the actual output that the wind turbine achieves at the given wind speed,
according to the manufacturers.The dashed line in the graph shows the theoretical maximum energy that this turbine could extract from the wind,
according to Betz's Law (59.3%). At a typical wind speed of
5 m/s, the Rutland FM 910-3 is extracting
19 Watts of power from the wind, which is an efficiency of
38%.
How efficient is the Rutland FM 910-3?
Wind turbines can only convert some of the energy in the wind into electricity. The graph here shows how efficient the
turbine is across the range of wind speeds you might get.
The orange line in the above graph shows the efficiency ranging from 0 to 1. The grey line is the previously mentioned maximum efficiency - The Betz Limit. If this limit is exceeded, the manufacturer's claims are not to be trusted!
While these graphs give an indication of the instantaneous power and efficiencies you might expect from the
Rutland FM 910-3 turbine, working out annual power production is more complex.
Read more about the
Power Predictor
This turbine produces roughly 24 Watts power at wind speeds of 5m/s and can produce up to 300 Watts of power at high wind speeds.
The cost of this turbine alone is £510 including VAT, however an extra £100 - £140 must be allowed if a a tower and mounting kit is required.
This turbine has a tower mount designed to fit a standard internal diameter of 41mm.
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The data published for each turbine comes directly from the manufacturer's data sheets.