Some Thoughts About Rotor Blades

R.W. Prouty

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Some Thoughts About Rotor Blades

机译：关于转子叶片的一些思考

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Some very early airplane people had based their propeller designs on what the marine engineers had done by using blades made of flat sheets. The Wright brothers were more scientific. They had tested several airfoil shapes in their wind tunnel and found that the maximum lift-to-drag ratio occurred at angles of attack of about 10 degrees. In order to have every propeller blade element operating at this angle, they used trigonometry along with the propeller tip speed and the airplane cruise speed to determine the correct pitch distribution.The result was a twist pattern as on a somewhat later propeller than the ones on the Wright Flyer.

机译：一些非常早期的飞机人将螺旋桨设计基于海洋工程师使用平板制成的叶片所做的工作。莱特兄弟更加科学。他们在风洞中测试了几种翼型，发现最大升阻比出现在迎角大约10度的位置。为了使每个螺旋桨叶片元件都以该角度运行，他们使用三角函数以及螺旋桨叶尖速度和飞机巡航速度来确定正确的螺距分布，结果是螺旋桨的扭曲模式比螺旋桨稍晚一些赖特传单。

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《Vertiflite》 |2013年第2期|40-41|共2页
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R.W. Prouty;
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Some Thoughts About Rotor Blades

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