I designed this fan based on the original fan, changing its solidity in the weakest points. the original fan broke, but in good condition to be able to take measurements to draw another. this fan does not have a centered fulcrum, but is decentralized from the rotation axis, made for a certain type of air-cooled compressors. it is screwed onto the pulley by the decentralized hole. I used a 100% filling because the strength to which it is subjected is great. I used the PLA filament stand. feel free to experiment with speed, resolution and the rest of the parameters at your leisure.