wing dihedral angle
... dihedral angle board 上反角测量板 wing dihedral angle 翼上反角 lateral dihedral angle 横上反角 ...
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上反角翼 anhedral wing
改变连翼机前翼上反角和后翼下反角对纵向气动特性影响不大，对横向气动特性有明显影响。
The changes in dihedral of front wing and cathedral of rear wing have little effect on longitudinal aerodynamic characteristics but large effect on lateral-directional characteristics.
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