Abstract: Some ground test data,flight test data and calculated results are given with respect to the effect of airlane control system properties on control rate(i.e., time for abrupt control dis-placement)and control surface deflection. Based on analysis of these test data and the calculated results,the application of abrupt pitching maneuver requirement of Military Airplane Flight Loads Specification(GJB67.2-85)is studied,and the important influence of airplane control sys- tem properties on flight maneuver loads is described.The results show that in the course of the draft design,we can regard the time for control surface displacement as the time for cockpit con- trol displacement in estimating the flight maneuver loads and in the course of the airplane de- tailed design and final design,we must take account of the influence of control system properties in calculating the maneuver loads.

Key words: pitchindination, aerodynamic loads, aircraft control, flight characteristics