Edit, to clarify: i refer here to 3D printed boat props, not for copters. I'm considering this as well. I have an electrical outboard engine on my 24". 600W is

Edit, to clarify: i refer here to 3D printed boat props, not for copters. I'm considering this as well. I have an electrical outboard engine on my 24". 600W is way less stressing on the material than even small combustion engines. I'll maybe try a 3D printed one next year. According to thingiverse, folks already successfully use printed props and the sharrow-design is there, as well, just need to adapt the mount and make sure the printer is up to it (i.e. convert from PLA to ABS, may have to get a new nozzle)