Launch spinning fans across the room with this 3-stage planetary gearbox powered launcher. This fully 3D printed toy converts your hand crank input into serious rotational speed through a precision 3-stage planetary gearbox. Spin the handle and watch as the fan accelerates, stop the crank and watch it fly. Everything snaps together—no screws, no bolts, no hardware needed. Just print the parts and assemble. Pure mechanical fun powered by gear reduction and physics. Why This Design Is Awesome: 3-Stage Planetary Gearbox - Multiplies your hand crank speed for powerful launches Snap-Together Assembly - No hardware, screws, or bolts required Fully 3D Printed - Every component prints on a standard FDM printer No Supports Required - Clean, easy printing with no cleanup Hand-Cranked Operation - No batteries or power needed

Complete Build Guide Want the full breakdown? Design details, print bed setup, and assembly instructions—check out our YouTube video:https://youtu.be/hwUMkCLFLIE

Help Us Keep Making Cool Stuff If you like this design, subscribe to our YouTube channel at https://www.youtube.com/@MacshayCreations. Your support keeps us cranking out free STL files for the community. More subscribers = more builds, more designs, more free downloads. We'd love to see your build! Post a photo of your finished toroidal fan launcher in the makes section so we can check out your print! For STL licensing options, check out our Patreon: https://patreon.com/MacshayCreations