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The experimental measurements for the estimation of convective coefficients were carried out within the wind-tunnel of the Institute of Engineering-UNAM. The wind-tunnel is of the closed circuit type and has a rectangular test section of 1.70 x 1.13 x 0.77 m and a 75 hp engine. Temperature data were collected through a system of sensors manufactured with LM35AH semiconductors and connected to a data acquisition device, AT-MIO-16E-IO Multi I/O from National Instruments.