Optimization of High-Crosswind-Tolerant Airplane Based on Double-Hinged-Wing and No-Vertical-Tail Configuration

Crosswind gusts can easily disturb the attitude of a small fixed-wing aircraft, potentially causing serious accident during landing or take-off operations. An airplane with high tolerance to crosswind owing quite Clβ and Cnβ values, called Quasi-Neutral Dihedral-effect Directional-stability (QNDD) airplane, was previously proposed. Although design QNDD is more practical than that Neutral (NDD) airplane’s robustness errors in should be comparatively higher. In present study, optimized using Sequential Least-Squares Quadratic Programming (SLSQP). The has unique configuration: highly deflected swept-forward main wing. It confirmed much robust original. To evaluate performance plunging into discrete gust numerically simulated, results confirm change still compared conventional airplane.