在转弯时，方向舵发挥的作用仅次于离心力，方向舵用来防止偏航。
The rudder plays a secondary role during a turn it is used to prevent yawing.
桨常常可以起舵的作用。
本文讨论了鸭式布局弹箭的滚转气动特性，分析了鸭舵的下洗影响作用。
In this thesis, the rolling moment characteristics of canard missies are studied, and theinfluence of downwash of canard was analyzed.
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