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介绍了Ｙ７－２００Ａ飞机防冰除冰系统、自然结冰飞行试验所需气象专用设备和机场气象条件的选择以及自然结冰的飞行安全。同时还介绍了飞行试验的内容、试验方法及试验结果，并对试验结果进行了分析。试飞结果表明，带自然积冰的飞机性能比带模拟冰型的好，自然结冰试验与模拟冰型试验之间飞机操纵特性没有不可接受的差异，飞机飞行品质良好。可供运输类飞机自然结冰飞行试验时参考。
Describes the Y7-200A aircraft ice deicing system, natural icing test required meteorological equipment and airport weather conditions, as well as the selection of the natural icing flight safety. At the same time, the contents of flight test, test methods and test results are also introduced, and the test results are analyzed. The test results showed that the performance of the aircraft with natural ice accumulation was better than that of the simulated ice model. There was no unacceptable difference in the airplane handling characteristics between the natural icing test and the simulated ice test, and the flight quality of the aircraft was good. For transport aircraft natural icing flight test reference.