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The World's Biggest Wind Turbine Blades Are So Long Their Tips Spin at 180 MPH. For off-shore wind farms to become an economically feasible alternative energy source, each turbine needs to be big. Like, really big. That's why the latest turbine blade from Siemens is giganticâjust a hair shorter than the wingspan of an Airbus 380.
Best for moderate to high wind 9 mph (4 m/s) and above. Whisper 100 provides dependable energy for remote homes, telecommunications sites and rural applications in moderate to extreme environments. Reliable operation by thousands of customers makes Whisper 100 the top selling small wind turbine in its class. Assuming a 12 mph (5.4 m/s) average wind, a Whisper 100 will produce 100 kWh per month. The Whisper 100 is one of the quietest wind turbines ever tested by the National Renewable Energy Labs.