The all-new powerplant features a geared architecture allowing the front fan to spin three times slower than the core, thus optimising the speed of each section of the engine.
全新的动力装置以齿轮传动结构为特点，此结构允许前端风扇转速比中心部分慢3倍，优化了发动机各部分的速度。
The engine hydraulic stepless speed regulation cooling fan changed the traditional drive type of the engine cooling fan.
发动机液压无级调速冷却风扇，改变了发动机冷却风扇的传统驱动方式。
The rotation speed of the fan under assumed temperature reduced thrust takeoff is calculated based on the analogical condition of engine.
假设温度减推力起飞的风扇转速由发动机相似条件计算。
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