Torodial Propeller/Fan

I created a torodial fan. If you have FreeCAD you can use the Spreadsheet to customize it to your liking. Didn't test it yet. I created it, to use on a HDD BLDC-Motor. The Measurements:
Span with: 150 mm
Inner diameter: 25,1 mm
Second inner diameter: 45 mm
Angle: 20°
Hight: 8 mm
Wide(Thickness of wings):5 mm

Have fun.