A Japanese simulation study points to different design choices for lightweight wings: corrugations can help reduce drag, while smoother curved profiles favor lift. Tokyo Metropolitan University highlighted the work on September 19, with possible applications in miniature unmanned aircraft and thin atmospheres such as Mars.[1]
The authors are Masahiro Kanazaki, a professor at Tokyo Metropolitan University, and Taro Imamura, a professor at the University of Tokyo. The latter’s laboratory lists the paper among its publications.[3][4][5]
An idealized test of wing shape
The researchers used computational fluid dynamics to optimize airfoils—the cross-sectional shapes of wings—for lower drag and higher lift. Their model had zero thickness, a computational idealization that isolates corrugation effects from the influence of thickness at the leading edge.[2]
The paper reports low-drag shapes with pronounced corrugations, including designs that outperformed flat plates on drag. Recirculating flow within the hollows helped form airfoil-like streamlines and reduce viscous drag. Designs favoring lift were more smoothly curved, with dips near the trailing edge that trapped vortices.[2]
A design lead, not a flight demonstration
The university presents the findings as guidance for future wing development.[1] The result does not establish that a manufactured aircraft will fly longer or carry more weight. Nor does it show that adding more corrugations improves every aspect of performance.
For engineering and business readers, Japan.co.jp’s assessment is that the next useful evidence would connect these idealized sections to buildable wings: finite thickness, structural strength, three-dimensional flow and deformation all need consideration. Comparing physical tests with simulations would help determine whether the predicted advantage survives those constraints.
The immediate value is a more focused choice of shapes to investigate. A procurement or product-performance claim would require evidence beyond this computational study.
