一种非线性部分极曲线的试飞方法

介绍了一种不测推力获取非线性部分极曲线的试飞方法。从飞机纵向动力学方程出发，推导出了利用试飞数据计算非线性部分诱导阻力系数Ａ值的公式，在铅垂对称平面内进行了飞行试验。试验结果表明：不测推力法试飞结果同测推力法试飞结果、风洞预测值以及Ｊ７原型机资料值具有良好的一致性，不测推力法是一种经济、可靠、简便而有效的试飞方法，可用于同类型飞机的非线性曲线试飞研究。

Nonlinear drag polar flight test without direct measurement of thrust

Without direct measurement of engine thrust, nonlinear induced drag coefficient and nonlinear drag polar is obtained by means of flight test on the basis of aircraft longitudinal dynamic equations. By conducting maneuver in aircraft symmetric plane, the flight test data are acquired. After compared with results of direct measurement of engine thrust, with results of wind tunnel and results of flight manual, the flight test results show that it is satisfactory and this method is an effective one.