Evaluating Longitudinal Unsteady Aerodynamic Effects in Stall for a T-Tail Transport Model

Although there have been many proposed methods to model unsteady aerodynamic effects in the stall and poststall region, little work has done directly assess impact of models on stability control characteristics. In this paper, state-space method for modeling is combined with bifurcation analysis examine sensitivity behavior choice method: quasi-steady or unsteady. It found that can adequately capture dynamics chosen example a T-tailed transport aircraft negligible wing–tail coupling. The study then expanded investigate hypothetical situation highly characteristics resembling delta wing configuration—achieved by increasing time delay constants model. This results an significantly lower flying qualities as indicated analysis. These findings highlight need implement techniques high-performance significant vortex-related aerodynamics order sufficiently their dynamics.