Research of the influence of propeller root on the aerodynamic characteristics of propeller

In this paper the wind tunnel test is used to analyze the effect of root chord of propeller on aerodynamic performance. There were two distributions of the chord near hub of propeller, all parameters are same except the maximum chord. Two models are respectively made of carbon fiber and beech. From the wind tunnel test results, the following conclusions can be drawn: By increasing the root chord within a reasonable range, thrust and torque will be increased, which also causes the efficiency to increase by 10%. Although the carbon fiber material is very strong for making propeller, we also cannot ignore the influence of root chord.