3/14/2024 0 Comments Foam board airfoil designThe feasibility of the concept of the hybrid wing structure has been demonstrated in flight tests. In addition, the underlying ribs ensure a high aerodynamic quality, despite the inflatable nature of the hybrid wing structure. The subsequent foam-inflated structure is lightweight and can be tailored to the expected loads. As demonstrated in tests, the inflation process of the hybrid wing is uncomplicated and swift. Due to the solid rib structure, the chord length of the wing defines the maximum packing dimension before inflation. Solid ribs that were previously attached to those spars provide high shape compliance for the external skin. For deployment, the cylindrical spars are rigidized using expanding foam that increases the buckling stiffness of the spars. The small packaging volume of the wing is achieved using spars and wing skin that are made out of flexible polyester-film material. This approach potentially reduces the packaging and logistical needs before deployment of a small UAV. The foam-inflated wing concept consists of a hybrid structure of rigid and flexible elements. Inflatable wings can greatly improve the portability of small UAVs.
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