I built a prototype of a narrow gauge motor yesterday. I’m happy how it works so far as only one wheel is powered right now as I only had one worm gear. When I started building this I decided to emulate the drive trains of many model locomotives that I’ve seen which involve a motor with a worm gear 90 degrees to the powered axle. I tried that design initially and the locomotive was way too slow. So this build, I sped up the RPM of the worm gear by adding gears. The plan is to build the battery into another car that is coupled and powered through a universal gear as I’ve seen in other prototypes. These two “cars” will then push the “locomotive” which is currently a WIP.