它围绕船底的一个钉子旋转，放下时提供压载力，以抵抗由于单侧风导致的船只侧向摆动。

Pivoting on a pin inside the hull, it swings down to provide ballast and resistance against sideways motion of the boat caused by the wind blowing from one side.

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在此基础上，设计了平衡滑翔情况下满足侧向摆动式机动及飞行约束所需的攻角变化规律。

Based on the flight corridor and equilibrium glide assumption, we can determine the angle-of-attack that satisfies the lateral weaving maneuver and all the flight constraints.

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