The significance of the influence of operating propellers on the aircraft aerodynamic characteristics is well-known. Wind tunnel testing of an airplane model with operating propellers is a complex task regarding the required similarity of the full-scale and the model case. Matching sufficient similarity in axial and rotational velocities in the propeller slipstream is the primordial c... https://www.spidertattooz.com/Essie-Gel-Couture-Inside-Scoop-0-5-oz-1088-p15287/