飞机的滚转性能一般用两类指标表示:副翼阶跃偏转下稳态滚转角速度值(以ω_x~(δ_x)为代表)和副翼阶跃偏转下给定时间内滚转角的变化(γ_t)。前者的试飞测定较简单和成熟。后者较复杂、缺少经验。本文给出一种试飞测定指标γ_t的方法,并用试验机进行试飞验证,得到了较满意的结果。 The rolling performance of the aircraft is generally indicated by two kinds of indexes: the steady roll angular velocity value (represented by ω_x ~ (δ_x)) under the aileron step deflection and the roll angle change within a given time under the aileron step deflection γ_t). The former flight test is relatively simple and mature. The latter is more complicated and lacks experience. In this paper, a method for the determination of γ_t of test flight is given and verified by test machine with flight test. Satisfactory results are obtained.