This is a simple test model of an impeller for maybe future air purifier system. I Had have some old spare brushless motors and this specific model is for EMAX RS2205S model.
The goal is to check if the motor will be able to turn such a impeller. Also, to check whether any suction can be generated.

The outer diameter - 80mm
Height - 40mm
Vanes - backward curved 60°

Test run:
https://youtu.be/hU9CmOBjCeE
I made the mounting holes for motor a little bit too big as a result I got some runout.