6x4 Ladder-Frame RC Truck

thingiverse

This is a 6x4 truck using a ladder-frame design with leaf spring suspension and dual motors driving the rear axles. This was an experiment to learn about leaf springs and ladder frames, and the first complete vehicle I designed from scratch in CAD, so there are some clunky parts. Posted upon request, instructions still in progress, but the design is complete for now. The steering would benefit from better geometry and the wheels could use some tires, but it does work. The provided gears use a 3 start worm and 9 tooth spur with 0.5 module, 20 degree pressure angle, and 20 degree lead angle. With 300rpm motors, this should provide a final drive up to 100rpm, and theoretical top speed of about 1.65mph. Traction is the limiting factor with hard wagon wheels, tires should help.