Y8飞机空中起动负拉力测试研究

概述了负拉力测试的意义和途径，介绍了在Ｙ８飞机进行ＷＪ－６发动机空中起动试飞中，用一台摄像机和一台高速摄影机测定发动机负拉力的实施过程及数据处理过程，并进一步探讨分析了Ｙ８飞机发动机空中起动试飞中排气温度，转速和桨叶角等参数的变化情况，通过研究，可以判断飞机负拉力特性及操纵安全裕度，从而验证理论计算或修正理论计算，可供从事本专业的飞行试验人员参考。

The Research of Negative-Thrust Test of the WJ-6 Engine Air-Start for Y8 Aircraft

his article describes significance and way of negative-thrust test, andimplement and data processing procedures measuring negative-thrust of an engine by apick-up camera and a high-speed camera during air-start test flight of WJ-6 enginefor Y 8 aircraft. The article also analyzes change status of exhaust temperature, rotatingspeed, blade angle and other parameters during air-start test flight. The negativethrust characteristic of the aircraft and the control safety allowance can be judged bymeans of research so that check or correct the theoretical calculation. The flight test personnel of same speciality may use the article for reference.