Matthew Venn built a simple brushless motor, that is available at GitHub:
Quite a few things inspired me to make this motor: I’ve been watching Walter Lewin’s excellent 8.02 lectures from his MIT course on electromagnetism, I saw a 3D printed motor on Hackaday, and I’m working on some simple educational science projects for kids.
I started off by copying the 3D printed motor, but made it parametric in Fusion360 so I could fiddle around with things. Thanks to Angel for helping with the 3D printing.
More details at Matthew Venn’s blog.
Check out the video after the break.