This work discusses the importance of harnessing wind energy to generate electrical power, especially in urban areas. The article presents experimental data collected from a prototype Savonius-type wind turbine and demonstrates that the performance can be improved by modifying the design and the structure, in order to better capture the kinetic energy of the wind. The paper also discusses various methods for evaluating the efficiency of wind turbines and highlights several previous studies that have proposed design changes to improve their performance. We conclude by emphasizing the usefulness of experimental data in teaching aerodynamics, particularly with regard to flow regimes and the appearance of vortices. Overall, it provides valuable insight into the design and performance of small-scale wind turbines and highlights their potential to provide a renewable source of energy in urban environment.