Tri-blade prop

Last year I had a local prototype shop produce 8 of these props using the SLA process. Needing a propeller solution for one of our micro FPV machines, this is what I ended up with.

The SLA prints were nice quality (at about $8.50 each) but very fragile and not functional. Also they are too fine to be molded. Injection molding is probably the way but these are fun to play with. The center hole fits a 1mm shaft such as the common brushed motors.

I say experiment with your particular printer and see what kind of quality you can get. I was impressed that they printed as well as the did and made my wife a miniature wind turbine using one of these props.