I made this small but powerful air blower for fun. While I am sure there is a lot of room for improvement it works quite well.

Don't pay too much attention to the print quality as this was printed on a very old printer.

The impeller is made of two parts that need to be glued together, everything else threads or slots together.

It uses A RaceStar BR2212 brushless motor (https://s.click.aliexpress.com/e/_c3ngfARN) secured in place with 4x M3 6mm long screws (these came with the motor). You also need a ESC to drive the motor (something like this https://s.click.aliexpress.com/e/_c3jw42pv) and either a microcontroller to send the signal to the ESC or a small servo tester (https://s.click.aliexpress.com/e/_c4V9murl). You will also need a battery for power.