A Cessna 172 has a chord length of 5 ft and a cruise speed of 140 mph (or 205 ft s). The scaled model in a wind tunnel has a chord length of 2.5 ft. To achieve Reynolds number similarity, assuming the same air density and viscosity at model- and full-scale, the airspeed in wind tunnel testing should be set to: 102.5 fts 1 410 fts 1 820 fts 1 205 fts 1

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Wind Energy

Wind energy is a renewable energy source that is used to generate electricity by wind power. The term, wind power, means utilization of kinetic energy of wind to generate electricity. Wind energy is termed renewable source energy because it can never be exhausted. There are other renewable energy sources, such as solar energy, geothermal energy, hydropower energy, and so on. All of them contribute to power the thermal energy stations to generate electricity.