propeller aircraft 中文意思是什麼
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He would come up, close, co - altitude, within about three to five feet, was making gestures, pulled back a little bit, came back up again and made some more gestures, and then the third time his closure rate was too far. instead of under - running, he attempted to kind of turn and pitch up, and that was when his vertical stabilizer - - where it meets the fuselage of the aircraft - - impacted my number one propeller, basically pretty much tearing his aircraft apart
他追上來、靠近、與我們同一高度，距我們約3英尺到5英尺以內，他做了幾個手勢，後退了一點，再次追過來並做出更多的手勢，然後他第3次靠近，這次他離得太近了。他不是在下方飛行，而是試圖做出某種轉身和提拉，此刻他的垂直穩定翼同機身相接的地方撞到了我的1號螺旋槳，他的飛機基本上就斷裂了。 -
An aircraft powered by a conventional propeller and supported in flight by a freewheeling, horizontal rotor that provides lift
旋翼機在飛行中以常規的螺旋槳來驅動並靠慣性滑行支持的，提供升力的水平旋轉儀 -
Based on the mechanism of slipstream interaction, described in this thesis is firstly the interaction of the propeller slipstream with the wing 、 fuselage and horizontal tail. subsequently, the changes in lift 、 drag and pitching moment are derived, giving an engineering model for the prediction of the increments in the aerodynamic characteristics caused by the interference between the propeller slipstream and the other parts of aircraft. this method offers a powerful means to the calculation of the aerodynamic interaction between the propeller and the aircraft, providing reliable data for the design of and aerodynamic calculation on propeller - powered aircraft
本文以滑流干擾的機理為出發點，研究了螺旋槳滑流與飛機機翼、機身、平尾組合體之間的相互影響，推導出滑流引起的飛機升力、阻力和俯仰力矩的變化，給出了滑流干擾對機體氣動特性影響的工程估算方法，為研究螺旋槳與飛機部件之間的相互干擾提供了有力的工具，為以螺旋槳發動機為動力的飛機的設計和氣動計算提供可靠的依據。 -
Active control of propeller induced aircraft cabin noise
螺槳飛機艙內噪聲的主動控制 -
This paper studies the helicopter, the propeller - driven aircraft and the turbofan jet airplane echo modulating feature parameter model and analyses the echo signal feature. it gains the target echo ’ s the cyclical modulation feature by using the complex ar frequency range bispectrum slice. because traditional method in extraction airborne radar ’ s radiant signal feature time has certain insufficiency, this paper proposes the approximate entropy and the norm entropy as the passive feature parameter in the airplane
由於傳統方法等在提取機載雷達輻射源信號特徵的時候存在著一定的不足，本文提出把近似熵和范數熵作為飛機目標識別的無源特徵參數，給出了提取相應特徵熵的演算法，實現對機載雷達輻射源信號的識別，通過和機載雷達類型的匹配，實現對目標的識別。 -
In the other hand, the shroud designed properly can decrease the noise of the propeller system. so it is used widely in ships, aircraft, and is developing all along
正是由於它的這些顯著的優點，函道螺旋槳被廣泛的用於輪船、特種飛行器（如地效飛行器） 、潛艇等的推進系統中，而對它的研究也在不斷發展中。
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