Ducted fan for small motors

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Ciao, ducted fan for use with small 23.5-24.5 mm motors. The tube is without holes, you decide on the length of the tube and at what height to make the hole to mount the screw and two blocks. The tube is 55 mm long, use a slicer to cut it to your desired length. After gluing the two blocks onto the tube using a screw to center them. The internal block has 2.5 mm holes, the same for motor support holes, you can thread an M3 screw ... before gluing it ;). Have fun. In this video below, you can see the model in operation.