| 摘要 |
The tail end structure of an aircraft has a cross-sectional configuration with laterally and downwardly extending lobes reaching outside a circular cross-section tail end structure, yet staying within the silhouette of the circular cross-section tail end structure as viewed from the top, the side, and the bottom, whereby the boundary layer formation and the boundary layer separation are improved as compared to a tail end structure having the circular cross-section.
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