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。
2
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。
3
Period characteristics of radiated noise at high frequency is investigated by a method based on short time Fast Fourier Transformation, and propellerspeed is estimated.