Ewolutiort of a Compoynd Helicopter

R. W. Prouty

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Ewolutiort of a Compoynd Helicopter

机译：复合直升机的演变

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With the recent demonstration of high speeds by the Sikorsky X2andtheEurocopterX3, there is an anticipation that the next generation of rotary-wing aircraft will be faster than the ones we know today. To illustrate some of the challenges involved, I have thought about how to make the conventional example helicopter of my textbook into a compound helicopter, raising the top speed from 185 to 285 knots at an altitude of 5000 feet and at the engine's 30-minute rating. This would be done by adding a wing and a pusher propeller to make a configuration like the Lockheed Cheyenne of the 1960's. (Making an advanced configuration from an existing design is the modern way. No new helicopter design has reached the production stage for many years.) I am going to retain the main and tail rotors of my conventional helicopter. Since the new one will undoubtedly have some low-speed mission segments, I will even keep the blade twist, which helps hover performance.

机译：随着西科斯基X2和欧洲直升机X3最近对高速的演示，人们预计下一代旋翼飞机将比我们今天所知道的要快。为了说明所涉及的一些挑战，我已经考虑过如何使我的教科书中的常规直升机示例变成复合直升机，在5000英尺的高度和发动机的30分钟额定值下将最高速度从185节提高到285节。这可以通过添加机翼和推进器螺旋桨来完成，以使构型类似于1960年代的洛克希德·夏安。（从现有设计中进行高级配置是一种现代方法。多年来，没有新的直升机设计进入生产阶段。）我将保留传统直升机的主旋翼和尾旋翼。由于新机型无疑将具有一些低速任务段，因此我什至将保持刀片旋转，这有助于悬停性能。

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《Vertiflite》 |2011年第3期|p.20|共1页
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R. W. Prouty;
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Ewolutiort of a Compoynd Helicopter

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