Abstract: This paper describes the load equation of measured aircraft in-flight load,using strain gauge method.Variance analysis and F-check technique are used;irrelevant strain gauge bridges and redundancy are dropped in order;by automatic computation,optimum load equa- tion is obtained which only concentrates on a few bridges of making significant contribution to the load,supplying a useful way of measuring aircraft flight load in flight test. The computed re- sults of the example show the method to be very effective to obtain an optimum load equation.

Key words: aerodynamic loads, dynamic loads strain measurement, mathematical models analy-sis of variance