The strange craft appears to have legs or blade-like parts similar to that of a helicopter.
这个神奇的飞行物看上去似乎是有腿的，或者是类似于直升机的桨叶。Adding a rotor blade (it had five on the main rotor and four on the tail) and using a modified exhaust system were among them.
增加一个桨叶（主桨有5个叶片，尾桨有4个），并使用了改进的排气系统。Also, the hair collecting material can be formed into the form of the blade without any support other than a rod for mounting the fabric.
而且，可将毛发收集材料形成为除了用于安装织物的杆以外没有任何支撑体的桨叶的形式。Practical application shows that this system can solve the problems appeared in the rotor blade digital design effectively.
实际应用表明，该系统能够有效地解决桨叶数字化设计过程中的出现的问题。The surface of the paddle blade is non-uniform rational B-spline surface, the surface has met precision requirements for paddle blade.
桨叶曲面为非均匀有理B-样条曲面，达到了桨叶曲面的精度要求。Kayaks are closed boats, and the paddles have blades at both ends. Competitors use their feet to control a rudder that steers the boat.
皮艇是封闭的，桨的两端都有桨叶，运动员用脚控制舵，控制船的方向。It was revealed that the ram air turbine performance could be improved by optimizing the blades near the hub region.
数值模拟结果显示在冲压空气涡轮桨叶近轮毂区域需要进一步优化。If, however, the blades are not tilted, the helicopter can be made to hover motionless in the air.
然而，如果桨叶不倾斜，就能使直升飞机在空中悬停不动。FW61 rotor hub device is equipped with a periodic pitch, rotating in the rotor blade can be changed during the pitch.
FW61旋翼毂上装有周期变距装置，在旋翼旋转过程中可改变桨叶桨距。