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1·Period characteristics of radiated noise at high frequency is investigated by a method based on short time Fast Fourier Transformation, and propeller speed is estimated.

用短时傅立叶分析的方法研究了辐射噪声在高频段时频变化的周期性，估计了目标的螺旋桨转速。

2·The Sikorsky X2 has a pusher propeller mounted at the rear to obtain its high forward speed.

美国西科斯基公司的X2拥有一部安装在后方的推进螺旋桨，这使它获得高速的前飞速度。

3·Instead, slight speed variations on each propeller perform that function automatically.

取而代之的是，它能自动调整使每个螺旋桨以稍有差异的速度运转。

4·In order to satisfy the operation requirement of the rated thrust of the propeller, the propulsion motor performs only in rated torque on the low speed, so the motor power is low.

认为以满足螺旋桨额定推力为目的，推进电动机只需要低速输出额定转矩来实现，即输出功率较低。

5·Also let us adjust the size or pitch of the screw propeller, then try to get high-speed running.

也让我们调整大小或摊位的螺旋桨，然后尝试获得高速运行。

6·The vessel is to be single fixed pitch propeller propulsion with one (1) low speed diesel engine located aft.

本船推进系统由1 台位于艉部机舱内的低速柴油机和一个定距螺旋桨以及轴系组成。

7·Propeller slip calculator for powerboats Please use this calculator to figure out all parameters in regard to pitch, gear ratio, RPM, speed and slip.

机动船的螺旋桨滑计算器请使用这个计算器计算出所有参数间距，齿轮比，转速，速度和防滑方面。

8·When the power required by propeller is so high that the shaft speed cann't arrive a rated value, the tip of propeller can be cut to decrease its load.

当螺旋桨要求的功率过高以至于轴转速达不到额定值时，可以采用切割螺旋桨叶梢的方法减小螺旋桨的负荷。

9·The advantage of the ducted propeller is, this type propeller can support greater thrust and higher efficiency under low speed, so is the first choice.

导管螺旋桨优势在于低航速时提供更大的推力和更高的推进效率，因此作为首要选择。

10·This paper concisely describes the selection of propeller type and interaction coefficients for high speed, and gives the application of some diagrams and empirical formulas.

本文扼要地介绍了高速船螺旋桨设计中碰到的螺旋桨选型问题、相互作用系数选取问题以及某些图谱和经验公式的应用。