Powered Hit and Miss Engine Kit

thingiverse

After completing the Fairbanks-Morse hit and miss engine model, I was eager to see it in action. The 1/16 scale model provided enough space for a small electric motor and battery pack. However, fitting the motor required bevel gears to couple with the flywheel, so I hollowed out the gearbox and added a separate cover. To install the switch and battery pack, I separated the base and created room for them. The engine now awaits a purpose to power! To assemble, attach the small bevel gear onto the motor shaft and mount it with super glue if needed. Install the motor while running wires through the base. Reduce friction by rubbing moving parts with acetone-soaked tissue and let it dry. Slide the axle through one hub and the big bevel gear, applying glue to the ends and attaching them to the flywheels without touching the bearing surfaces. Adjust motor and drive gear for proper meshing and secure with glue. Glue the base to the engine, solder wires, attach the switch and battery holder, and test your creation! Non-printed parts include a 1.5V-3V N20 small DC motor, one cell AA battery holder, and an SPST micromini toggle switch.