Most of the structure came from the top, providing rigidity, while the flexible wing joint came from the side of the body.
大部分结构来自顶部,提供刚性, 而灵活的机翼关节来自身体的侧面。
英语百科
Flexible wing
In aeronautics, a flexible wing is an airfoil or aircraft wing which can deform in flight.
Early pioneer aeroplanes such as the Wright flyer used the flexible characteristics of lightweight construction to control flight through wing warping. Others made collapsible wings for folding away, such as the flying car designs by Gustave Whitehead.