Yaw axis - Vertical axis, passes through the airplane from top to bottom - left and right control is by rudder.
偏航轴—又称垂直轴。由机身上方通向下方。飞机绕此轴转动即造成机首之左右运动，此一运动由方向舵控制。
The pictures of the double-circle target fixed on a jaw rudder surface and parallel to its axis were taken by a stationary digital camera.
用一台位置固定的数码相机对平行于飞机方向舵转轴并固定在该舵面上的一个双圆靶拍照。
The pictures of the double-circle target fixed on a jaw rudder surface and parallel to its axis were taken by a stationary digital camera.
用一台位置固定的数码相机对平行于飞机方向舵转轴并固定在该舵面上的一个双圆靶拍照。
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