The efficiency of energy conversion from wind to mechanical energy of a rotating wind turbine rotor depends on the flow conditions of the medium and its impact on the rotor blade. The flow conditions change with the change of wind speed and rotor rotational speed. Therefore, in order to increase the operating area of ​​a wind turbine with good efficiency values, it is necessary to modify the turbine blade setting. Mechanical solutions for changing the turbine blade pitch setting exist for large wind turbine rotors. For small wind turbines, such systems are not used due to the cost of the system significantly increasing the cost of a small turbine. Therefore, it is necessary to develop a solution that will be cheap to use and will ensure improvement of the efficiency of a small wind turbine. The article discusses the analysis of the possibilities of using a turbine blade with modified geometry using centrifugal force. Analyses of the deformation of the blade with the proposed structure were carried out in numerical tests and the obtained results are presented in the article.