Rotor design is comprised of some factors such as hub configuration, blade number, rotor diameter, rotor solidity and airfoil which have effects on helicopter performances.
旋翼设计包括桨毂构型、旋翼桨叶片数、旋翼直径、旋翼实度、翼型剖面等一系列影响直升机性能的因素。
The open water characteristics of a series of large hub-diameter Ratio MAU propellers are calculated by using lift-surface method to expand the chart of MAU-series propeller.
采用升力面涡格法对系列大毂径MAU型螺旋桨进行敞水性能计算，运用理论算法扩充了MAU型螺旋桨图谱。
Drag onto the page. Drag yellow diamonds to resize hub circle, root circle, and outside diameter.
拖到绘图页上。拖动黄色菱形可调整中心圆、齿根圆和外径的大小。
Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.
在进行经济技术性分析后，最终确定风机的设计方案，进而确定通风机适当的级型式、叶轮尺寸、轮毂比、转速和叶片数等基本参数。
Preferably, the hub has a diameter of between 40% and 50% of the diameter of the rotor, measured at tips of the blades, and is solid so as to prevent air passing through the hub.
优选的，毂的直径为在叶尖处测量的转予直径的40%和50%之间，且是实心的以防止空气越过毂。
Preferably, the hub has a diameter of between 40% and 50% of the diameter of the rotor, measured at tips of the blades, and is solid so as to prevent air passing through the hub.
优选的，毂的直径为在叶尖处测量的转予直径的40%和50%之间，且是实心的以防止空气越过毂。
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