Printable quad-blade propeller for QX90 Ducted Frame

This is a printable prop for 8.5mm brushed motors

It is designed for the ducted micro frame.

Just print four (two mirrored) of them out and put them in the quad. These props produce in my case more thrust then the 3-bladed ones and look more like those from the Inductrix.

Generally is a fine print needed.