aeroelastic-gust-responselisted

# Aeroelastic Gust Response (aerodynamics/aeroelasticity/aeroelastic-gust-response) Use when the task is the DYNAMIC response of a flexible two-degree-of-freedom typical wing section to a discrete gust: the plunge and pitch time histories driven by the unsteady (indicial) aerodynamic lift, the dynamic magnification factor of the peak lift over the quasi-steady value, and the peak-load verdict against a limit. This leaf is the flexible-section RESPONSE problem, distinct from the rigid discrete-gust certification load case (structures/loads/gust-maneuver-loads owns that load method), from the flutter speed search (flutter-speed-prediction owns the V-g method), and from static divergence (divergence-speed). The model pairs with flutter-speed-prediction: the same typical-section machinery, a different question (stability there, forced response here). ## Domain quick reference - Typical section: plunge h (positive DOWN, m), pitch theta (positive nose-up, rad) about an elastic axis at fraction e of the chord from the leading edge; per-unit-span mass m_s (kg/m), pitch inertia I_theta (kg m^2/m), plunge stiffness k_h (N/m), pitch stiffness k_theta (N m/rad), structural damping ignored. Reduced time s = 2*V*t/c with semi-chord b = c/2. - Sign conventions: lift L is positive UPWARD (conventional lift) and the plunge equation is m_s*h_ddot + k_h*h = -L; an upward gust therefore accelerates the section upward, the physically correct direction. A section moving down (h_