To resolve the problem of interference between aerodynamic load and centrifugal load in fatigue test of propeller hub

a loading method was designed based on the analysis of load on the propeller hub and its testability. Using the test principle of full bridge circuit flexibly

the loading method was formed on the basis of strain output control with the processes of static and dynamic calibration. Besides

the correlation between the calibration load and non-calibration load during the processes of load calibration and the loading error resulted from the correlation were analyzed. The interference between these two loads was reduced by means of strain linear superposition. Thus aerodynamic load and centrifugal load are applied accurately with the error of the loading system less than 5%.