Abstract
This research is about the savonius wind turbine which was made in the form of a prototype as a simple student learning media. The goal is the students understand the process of converting wind energy into mechanical energy. The turbine model used is helical savonius rotor with U, S, and L profile on three blades and four blades. Tests carried out using wind tunnels. The test results show that helical savonius rotor with three blades provides better performance than four blades. The best turbine power is obtained in the L profile with three blades which is equal to 1, 62 watts. While the best power coefficient is obtained from the S profile with 3 blades with a power coefficient value of 0.122.
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