flutter-speed-predictionlisted

Use when the task is classical wing flutter of the two-DOF typical section, the V-g method, damping crossing, frequency coalescence, or flutter clearance. Compute the classical flutter speed of a two-degree-of-freedom bending-torsion wing section: build the typical section with plunge and pitch about the elastic axis, apply Theodorsen unsteady aerodynamics with the complex lift-deficiency function C(k), run the V-g method across the reduced frequency range, locate the flutter speed where the artificial structural damping g crosses zero, check frequency coalescence near the flutter boundary, and assess the flutter margin against the design dive speed in the FAR 25.629 clearance context. Produces the flutter speed, flutter frequency, reduced frequency, coalescence verdict, and a clearance margin assessment. Trigger: flutter speed, v-g method, bending-torsion flutter, frequency coalescence, typical section, flutter margin, far 25.629.
ashfordeOU/aero-agent-skills · ★ 0 · AI & Automation · score 78

Install: claude install-skill ashfordeOU/aero-agent-skills

# Flutter Speed Prediction (aerodynamics/aeroelasticity/flutter-speed-prediction) Use when the task is the classical flutter condition of a two-degree-of-freedom wing section: the flutter speed where the bending-torsion modes lose stability, found with the V-g method, the frequency coalescence check, and the flutter margin against the design dive speed for flutter clearance in the FAR 25.629 context. This leaf is the dynamic counterpart of aerodynamics/aeroelasticity/divergence-speed (static divergence); it is also distinct from structures/fem/modal-analysis (mode extraction) and aerodynamics/high-speed/swept-wing-aerodynamics (sweep effects), which feed and shape multi-mode flutter work. ## Domain quick reference - Binary typical section: plunge h (positive down) and pitch theta (positive nose-up) about an elastic axis at a*b from the mid-chord (positive aft; a = -0.2 is the elastic axis at 40 percent chord), with semi-chord b. The structural parameters are the mass ratio mu = m / (pi * rho * b^2), the static unbalance x_theta (the distance from the elastic axis to the center of gravity divided by b, the inertia coupling), the radius of gyration squared r_theta^2 (inertia about the elastic axis I_theta = m * r_theta^2 * b^2), and the uncoupled bending and torsion frequencies omega_h and omega_theta (stiffnesses K_h = m * omega_h^2 and K_theta = I_theta * omega_theta^2). - Unsteady aerodynamics: the Theodorsen loads with the complex lift-deficiency func