Аннотация:A problem of motion of a double-link aerodynamic pendulum is considered. Each link is connected with a wing that interacts with a flow. A dynamic model of the system is built. Dependences of equilibrium positions on the system parameters such as wing pitch angles and a ratio of areas of the wings are obtained. The problem of stability of equilibrium positions of the system is studied. In some special cases the regions of stability of equilibrium positions in the parameter space are described. It is shown that all equilibrium positions are unstable in a certain range of parameter values. Undamped oscillations arise that can be used for converting medium flow energy into electrical energy. Numerical and analytical study of undamped oscillations behavior is conducted depending on the ratio of the wing areas.