4th ARJ21-700 Completes Windshield Defogging System Certification Testing

 

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The 4th ARJ21-700 completes windshield defogging system certification testing on Aug. 1. Photo from COMAC

The fourth ARJ21-700(serial number 104) landed smoothly at Sanya Phoenix International Airport (SYX) at 1:44 a.m. on Aug. 1, marking the completion of certification testing on ARJ21-700's windshield defogging system.

The windshield defogging flight test is designed to verify that pilots can see clearly by virtue of heating element for windshields in the case of rainy or foggy conditions due to surrounding temperature changes. Because of the high quality concerning temperature and humidity demanded by the certification flight tests, Commercial Aircraft Corporation of China Ltd. (COMAC) chose Sanya as the testing base.
During the testing, the aircraft leveled off at 35,000 feet (ten thousand meters). When the windshield's temperature decreases, the ARJ21-700 aircraft lost altitude and leveled out at specified altitude. Temperature changes made the cockpit windshield generate fog, and then the defogging system functioned actively through its heating device. In the certification testing, the ARJ21-700 aircraft defogged the windshields, meeting the airworthiness requirements of the test subjects.