The wind tunnel is considered as an important device to test the aerodynamic performance of the different bodies, the function of it is to imitate the controlled wind speed of optimal environment that facing the model for unlimited time to obtain the aerodynamic steady-state experimental results. The wind tunnel performance depends on the characteristic of the air stream passing through test-section, the aim of this research is to investigate the viability of the wind tunnel that exist in the gas- dynamic laboratory of the Damascus university, by comparison the experimental results as forces and coefficients of lift and drag for three difference types of the aerofoils (NACA6410, Sg6043, NACA7308) with the results of the advanced program specific for design and define the aerofoil characteristic which called (DesignFoil R6) prepared by Illinois university.
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