Following our study of the Pazy wing, an aeroelastic benchmark of a very flexible straight wing, we continue to study very flexible swept wings, where bending-torsion coupling affects the aeroelastic responses even in the undeformed state. Swept wings of 10 and 20-degree sweeps were tested in the low-speed wind tunnel at the Technion at static and flutter conditions. Our research papers describe the wings’ design, analyses conducted using the Modal Rotation Method, test results, and insight into the wings’ nonlinear aeroelastic behavior.
More Information
- Watch a demonstration of a 20-degree swept wing entering flutter. The wing is set at a 10-degree angle of attack (indicated as AL1 in the video). As the test progresses, the airspeed gradually increases in the background until the onset of flutter. A small weight is attached to the trailing edge via a 3D-printed case with a thin neck, designed to act as a flutter fuse. As flutter-induced oscillations intensify, the neck eventually breaks, the weight flies off, and the flutter stops.
- And here’s a reconstruction of the flutter mode from motion tracking system data
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Bar Revivo
Conference Papers
- B. Revivo and D.E. Raveh, “Static Aeroelasticity and Stability of Very Flexible Swept Wings,” AIAA SciTech Forum, Orlando, 2025. AIAA 2025-1018.
