Fellow RoBo3D forum user just printed a "functioning" 3d printed turbofan on his Robo3D

3D Printing
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Fellow RoBo3D forum user just printed a “functioning” 3d printed turbofan on his Robo3D R1.

It’s probably old news from when the original creator made one, but I still enjoyed it!
http://www.youtube.com/watch?v=ymkld-1HDHQ

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I’m not sure I understand what I’m look at here. Sure is noisy!