| 1. | Repeat the above , but start the autorotation from the pilot left
重覆执行上述的步骤，但由操控者的左侧开始执行熄火降落。
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| 2. | The helicopter does not have to be pirouetting when the autorotation starts
在执行熄火降落的动作之前，机体不须保持自旋。
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| 3. | During the autorotation , pirouette the helicopter a minimum of three ( 3 ) times
执行熄火降落的过程中，机体至少需自旋3圈。
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| 4. | The helicopter must complete a 180 degree turn after the autorotation has started
熄火降落的程序开始执行后，直升机必须完成180转弯的动作。
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| 5. | The landing of a helicopter in autorotation is formulated as a nonlinear optimal control problem
本文将直升机的自转着陆过程定义为一个非线性的最优控制问题。
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| 6. | A three - dimensional rigid body model is used to study the landing of a helicopter in autorotation
首先，建立了一个描述直升机自转着陆飞行动力学特性的三维刚性体模型。
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| 7. | Starting from an altitude of no less than twenty ( 20 ) meters and on a heading parallel to the flight line , start your autorotation
机头保持与航道平行，且高度不得低于20公尺，开始执行熄火降落。
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| 8. | By combining with the machining needs of parallel machine tools , the working space and the law along with the variation of its autorotation angle were studied
结合并联机床的加工要求，研究了工作空间及其随自转角的变化规律。
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| 9. | Starting from an altitude of no less than twenty ( 20 ) meters , and on a heading parallel to the flight line , and to the pilot right start your autorotation
机头保持与航道平行，且高度不得低于20公尺，朝操控者的右侧开始执行熄火降落。
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| 10. | Starting from an altitude of no less than twenty ( 20 ) meters and on a heading parallel to the flight line , with the helicopter inverted and to the pilot right , start your autorotation
机头保持与航道平行，且高度不得低于20公尺，直升机保持倒飞姿态，向操控者的右侧开始执行熄火降落。
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