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Inspired by large-scale birds like albatross, unpowered, long-duration and low-energy dynamic soaring is one of the typical flight modes of sailplanes. In this study, we build a full six-degree-of-freedom (6-DOF) piloted sailplane model to investigate the aerodynamic design parameters, environmental conditions for flight, and energy harvest mechanism. We found that only sailplanes with wing loading larger than 20 and aspect ratio larger than 8.6 can perform dynamic soaring. In addition, the ambient wind speed must be lar than 6 m/s. During each cycle of dynamic soaring, energy gain and loss are in equilibrium during flight, and the loss of energy comes mainly from reorientation.

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Flight Envelope and Energy Equilibrium Strategy of Sailplanes to Perform Dynamic Soaring

  • 会议论文

  • 发表日期：

    2025年

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  • Yufei Yin,
  • Lunbing Chen,
  • Yang Xiang,
  • Suyang Qin,
  • Hong Liu

摘要

Inspired by large-scale birds like albatross, unpowered, long-duration and low-energy dynamic soaring is one of the typical flight modes of sailplanes. In this study, we build a full six-degree-of-freedom (6-DOF) piloted sailplane model to investigate the aerodynamic design parameters, environmental conditions for flight, and energy harvest mechanism. We found that only sailplanes with wing loading larger than 20 and aspect ratio larger than 8.6 can perform dynamic soaring. In addition, the ambient wind speed must be lar than 6 m/s. During each cycle of dynamic soaring, energy gain and loss are in equilibrium during flight, and the loss of energy comes mainly from reorientation.