• The simplest way to dampen a helicopter's noise is to increase the Angle of the rotor's blades, also called the pitch, and slow them down.

    降低噪音简单方法增大旋翼桨叶夹角叫“节距”,或是降低转速。

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  • The main blades pitch Angle is controlled by the up and down movements of the swashplate.

    桨的螺距角度倾斜盘的上升下降动作控制的。

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  • The main blades pitch Angle is controlled by the up and down movements of the swashplate.

    桨的螺距角度倾斜盘的上升下降动作控制的。

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