Students studied alternative energy and gear ratios as they designed fully functional wind turbines using a variety of materials. The challenge was to generate as much voltage as possible. After students drew their turbine blades on CAD, we used the laser engraver to cut them out. From here students had to study compound gear boxes and find the best ratio that didn't sacrifice torque. They were all successful at the extreme challenge of laying out the gearbox, drilling the holes and assembling. They experimented with blade angles and built self-correcting tail fins. Students even used a tachometer to measure blade RPM. The winning team produced 19 volts!
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