Therefore, the study of this paper meets the need of our country's new helicopter design.

因此，本文的研究适应了我国直升机研制的需要。

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The method presented in this paper may be used for reference to the people who work on the armed helicopter design and operation.

本文的理论公式和计算方法可用于武装直升机的设计，并可对其战术使用提供参考。

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China helicopter Design Institute and Changhe Aircraft Industry Group (CAIG), both located in Jingdezhen, Jiangxi Province, were appointed as main contractors for the project.

中国直升飞机设计研究院和昌河飞机工业集团(CAIG)，两者都位于江西景德镇，指定为计划的主承包商。

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Tharon Trujillo, 16, of Plumas Lake, California, invented a new helicopter design at the age of 10 to help people in disaster areas.

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First, the ducted fan design allows the car to achieve the speed and maneuverability of a helicopter -- 155 mph, 12, 000-foot altitude, two hours of flight time, vertical take off and landing -- but removes the dangers of exposed rotors, allowing the "car" to sidle up to buildings for rescue missions, or coexist in close quarters with other vehicles.

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