运20（Y-20）的母系大运

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卡申介绍，乌克兰安东诺夫飞机制造公司是中国军用运输机发展计划的重要国外合作伙伴。乌克兰工程师积极参与中型运输机运-8/运-9系列飞机以及中国新款重型军用运输机运-20的研制工作。不久前亮相的运-20就是在“安东诺夫”开发的、但最终没有进入实施阶段的重型军用运输机安-170的基础上研制而成的。乌方工程师实际上负责解决这种飞机的许多关键性技术问题。此外，“安东诺夫”还负责设计中国民用支线客机ARJ-21机翼的设计工作，尽管它的研制工作一再推迟，费用成倍增加。

http://mil.huanqiu.com/observation/2013-01/3573651.html
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文章来源：http://mdb.cast.ru/
Sergey Goncharov
MOSCOW DEFENSE BRIEF


An-77是基于An-70的涡扇版，发动机由桨扇换成涡扇，最大载重47-50吨
An-170是基于An-70的改进版，最大载重60吨

As a result the whole project has switched to a different underlying design by ANTK Antonov, the An-170, which is another variation of the An-70. The An-170 is a heavy operational-strategic transport which Antonov worked on in the late 1980s - early 1990s. The project was in competition with the Il-106, a rival design by the Ilyushin Bureau. The Il-106 was announced the winner by the Soviet authorities, but owing to the crisis which ensued after the break-up of the Soviet Union neither aircraft went into production. The An-170 is much larger and heavier than the An-70, with a take-off weight of 230 tonnes and a maximum payload of 60 tonnes. Another difference is the »regular» wing profile of the An-170, whereas the An-70 uses the so-called «supercritical» profile. The latest version of the Y-20 project still relies on the four D-30KP-2 bypass turbofan engines. Naturally, this means that the excellent short take-off and landing specifications of the original design are now out of the question- but there is every reason to believe that these specifications are still fairly good by normal standards.
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