عنوان مقاله [English]
In this study, the effects of side slip has investigated on a delta wing airplane model aerodynamics specifications and also an experimental method for airplane dynamics stability derivatives determination is presented. Measured data obtained from force oscillation tests are time historical of aerodynamic forces and moments. Using this data in-phase and out-of-phase of aerodynamic coefficient will be determined. In this investigation results of static and dynamic tests of a model at high angle of attack maneuver in National Low Speed Wind Tunnel (NLSWT) at Reynolds number about 1.75 millions are presented. Increasing of side slip angle results that maximum lift coefficient, slop of lift curve and longitudinal stability will be decreased. At small mean angle of attack there is no variation in in-phase and out-of-phase of normal force coefficient at larger mean angle of attack these variation is significant. Also In-phase and out-of-phase of pitching moment coefficient is strongly depend on angle of attack.
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