Straw air rotor - school experiment on compressed air thrust
thingiverse
Run a simple experiment by printing the STL file named "Straw Rotor Build Plate.stl" using a layer height of 0.15-0.2mm, 100% infill, and a brim thickness of 2-3mm. Cut three pieces from a 5mm diameter soda straw, then press the rotor onto the hub to ensure it can rotate smoothly. Insert the straw pieces into the rotor and position them so that they don't point in the same direction. Blow gently through the center straw and watch as the rotor spins!
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