呢兩點加埋 ， 結果就係 杯水打側方向嘅作用力太細 四旋翼亦因此主要受到空氣動力控制 所以向側邊嘅力都可以忽略
Together, the result is that the force in the side direction is too small, and the quadcopter is therefore mainly aerodynamically controlled, so the force to the side can be ignored