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【24h】

What a drag

机译:多么拖动

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摘要

SITTING IN THE LEFT SEAT OF ORVILLE, a Cessna Aerobat, it took all the concentration I could muster to hold the airplane in a 60-knot glide. After descending through the prescribed 800 feet, Bill yelled, "Recover!" After I slid the mixture control forward, Bill looked from side to side and laughed while he yelled "Clear!" I then pushed the yoke forward and, one by one, began to see the propeller blades begin to turn once again. After reaching 120 knots, the engine roared back to life and we climbed back to altitude for more glides. My flight test partner that day was William K. Kershner, an aviation author whose books taught generations to fly. Bill took pains to ensure that the information in his books was correct and, whenever possible, verified assertions using tests in his own airplane. That day we were gathering data to demonstrate that a windmilling propeller is a source of considerable drag. Over the course of several flights we conducted 52 glides, half with propeller windmilling and half with it stopped. I analyzed the results (see p. 88) and concluded that, for the Cessna Aerobat, glide distance can be increased by about 8.3 percent by stopping the propeller. That translates to a 17-percent increase in area available after losing the engine.
机译:坐在奥维尔的左座,一个塞斯纳适航机,它采用了所有的浓度,我可以在60张滑行中握住飞机。在下降的规定的800英尺后,比尔大吼大叫,“恢复!”在我滑动混合控制后,比尔从一边看,他喊道“清除!”然后我向前推轭,一个接一个地,开始看到螺旋桨刀片开始再次转动。在达到120结120结转后,发动机咆哮着生命,我们爬回海拔高度以获取更多滑行。我的航班测试合作伙伴那天是威廉K.Kershner,航空作者,其书籍教授一代飞行。比尔占据了痛苦,以确保他的书中的信息是正确的,并且只要在可能的飞机中使用测试就可以进行验证的断言。那天我们正在收集数据,以证明风车推进器是相当长的阻力的源泉。在几个航班的过程中,我们进行了52张滑动,一半用螺旋桨风车和一半停止。我分析了结果(参见第88页)并得出结论,对于Cessna Aerobat,通过停止螺旋桨,可以提高滑翔距离约8.3%。这在失去发动机后可用的区域增加到17%的增加。

著录项

  • 来源
    《AOPA pilot》 |2021年第6期|87-89|共3页
  • 作者

    CATHERINE CAVAGNARO;

  • 作者单位

    The University of the South;

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  • 原文格式 PDF
  • 正文语种 eng
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