Bigger parametric propeller

It's a hot summers day, I've got a motor from a busted cordless screwdriver, but no propeller.... all the ones i found were too small, or looked too hard to print, so when I saw this one i thought nice.

After a quick hack it's now 11 cm wide, about 3 cm high and gives a gentle breeze.
I added a height parameter to adjust shroud and centerpiece height

Could be made even bigger but my yaxis is only 12cm, so maybe later :)
Now i just need to print a stand for it!

Edit, added a stand