Dual Mode Windup Car

youmagine

If you've been following my previous spring motor rolling chassis designs (here: https://www.youmagine.com/designs/dual-mode-spring-motor-rolling-chassis, here: https://www.youmagine.com/designs/spring-motor-rolling-chassis-version-2, and here: http://www.thingiverse.com/thing:430050), you'll notice they're all open frame designs, primarily because I love watching gears in motion, secondary is weight reduction (or did I get that backwards?). Dual Mode Windup Car is my first attempt at a rolling body design, but I left the windows down so I can still watch the gears. For my description of "dual mode," see this thing: https://www.youmagine.com/designs/dual-mode-spring-motor-rolling-chassis. This design has a significant weight increase over previous designs, and to compensate, I increased the final drive gear ratio from 1/25 to 1/16 to boost torque. As such, I also strengthened the axles and gears to handle the increased torque. After testing, this vehicle easily traveled around 40 feet on smooth surfaces. The wheels and body top shown in the photographs are designed for dual extrusion printers, however I've included single extrusion versions of all necessary parts. Video of the prototype is here: . You'll need to purchase 16 "AS 568" size 222 (1 3/4 O.D., 1 1/2 I.D., 1/8" diameter) o-rings for the tires. I probably forgot a file or two, so if you have any questions, please feel free to ask. Designed using Fusion 360, sliced with Cura 2.3.1, and printed on an Ultimaker 3 Extended in PLA.