The propeller has forward swept tips and a swirled leading and trailing edge, with the goal to break up the sound waves. It also has a winglet to help with recirculation.
I would advise printing this on a resin printer, and my favorite material so far is the
Siraya Tech Blu Nylon Mecha. Print them straight up, with supports only at the bottom around the hub, to avoid marring the lift surfaces with supports.
Remember these spin fast and the wrong material, cure time, any impact, etc will certainly shatter them, so test at your own risk.
The author marked this model as their own original creation.