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Leonardo's AW609: Bringing tiltrotor technology to civil aviation

机译：Leonardo的AW609：将TiltrotOR技术带到民航

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摘要

Man was intended to fly like a bird - not like a bat out of hell," is an aphorism attributed to Lawrence Bell, founder of the eponymous rotary-wing manufacturer and, with inventor and polymath Arthur Young, developer of the first civil-certificated helicopter, the iconic Model 47.Regardless of the statement's provenance, the sentiment accurately conveys the age-old human dream of being able to rise vertically from the ground and then fly through the air - like a bird. The helicopter, of course, satisfies the vertical takeoff half of Bell's alleged dictum, but to go anywhere must thrash through the air, "beating it into submission," as rotary-wing pilots like to joke. As a result, rotary-wing craft are limited in speed and range and generally confined to lower altitudes.As early as the 1950s, Bell began exploring the possibility of combining vertical capability with fixed-wing flight with the XV-3. One of the world's early tiltrotor experiments, the aircraft featured twin wingtip-mounted helicopter-like rotors driven through shafts by a radial engine installed in the fuselage. While dogged by persistent rotor instability (specifically, a variation on whorl mode), the XV-3 nevertheless logged more than 100 hr. flown by Bell and U.S. Air Force pilots, thus proving the viability of the tiltrotor concept.
机译：男人旨在像一只鸟一样飞翔 - 不是一个蝙蝠地狱，“是一种阿姨响铃，同名旋翼制造商的创始人，以及本发明人和Polymath Arthur Young，第一个公民验证的开发商是一种动漫主义。直升机，标志性模型47.陈述的声明的出来，情绪准确地传达了从地面垂直上升的年龄古老的人类梦想，然后飞过空气 - 就像一只鸟一样飞过空气。当然，陆直，当然，满足直升机贝尔据称的垂直起飞一半，但是去任何地方必须通过空中捶打，“击败它进入提交”，因为旋翼飞行员喜欢笑话。因此，旋翼工艺在速度和范围内有限一般局限于较低的高度。作为20世纪50年代，贝尔开始探索与XV-3的固定翼飞行结合垂直能力的可能性。世界早期的Tiltotor实验之一，飞机特色Twin WingTip-Mounte D直升机状转子通过安装在机身中的径向发动机驱动轴。虽然通过持久转子稳定（具体而言，螺纹模式的变化），但XV-3仍然记录了超过100小时。由贝尔和美国空军飞行员飞行，从而证明了泰尔特洛特概念的可行性。

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