Modular boat propeller designed for 3D printing 80mm diameter

This propeller is part of a bigger boat motor project that I'm working on, but I decided to publish this propeller in advance as it will take some time before the rest is finished, and maybe some one can find this useful.

Note! These blades are the first prototypes, I will make more blade designs to fit to this hub, so even if you only need the propeller and don't care about the rest of the project, check back here for more blades.

Specification

Outer diameter: roughly 80mm (a little