Panel of photos of the two types of robotic racers. Overhead view and side view of the racers assembled. Close-up of respective gear train assemblies is also shown. The racer shown on left is in the "geared up" configuration and racer shown on right is in the "geared down" configuration.
Two pairs of panels. The left panels show the gearing up configurations. The right panels show the gearing down configurations. Each model contains a motor and wheel assembled onto a particular gear train.