Porcupines' quills, or spines, take on various forms, depending on the species, but all are modified hairs coated with thick plates of keratin, and embedded in the skin musculature.
Produce up to 400-Watt of power for free in your own back yard. The wind turbine will produce more power up to 400-Watts at 28 mph. If the wind dies down the turbine will continue to produce power in winds as low as 5.6 mph. This wind generator is used to charge 12-Volt batteries and mounts on any 1.5 in. Schedule 40 pipe.
More general: This depends on the size of the turbine and the wind resource. A single 1MW turbine operating at a 45% production rate will generate about 3.9 milion kW of electricity in a year. This would be enough to meet the needs of about 500 households per year.t is not the fault of the system, but average winds. Wind Turbines are rated at between 25 and 28 MPH winds. If the wind goes over 31 MPH, most systems shut down. Power is cubed, so a wind of 14 MPH provides 100KWH from a 1 MWH system.