公转方向
公转方向-
Y<1.0时，捻线存在与捻制公转方向相反的扭转弹性恢复；
While Y < 1.0 , there is torsional elastic spring back in the opposite direction of laying revolution in the metal wire ;
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需要注意的是，这是选择航天器入轨速度与地球公转速度方向一致时计算出的V3值；
It should be noted that this is to choose the speed of the spacecraft orbit the Earth and the revolution speed in the same direction when the calculated value of the V3 ;