Since the project is concerned with control systems, not robot design, learners are given the chassis ready built. It is a conventional three-wheel design, with two wheels driven by separate, geared DC motors, and a castor wheel at the rear for balance.

We used Fischertechnic because we already had it, and it is quite good. If starting from scratch, however, we would probably seek a cheaper solution.

It is possible to build a Fischertechnic buggy from a single rectangle of bricks - the motors and the gearboxes are an integral part of the structure. This simple structure is not very robust, however, and ours are made from a double layer of bricks locked together with intermediate pieces and topped with flat plates to form a deck. These have proved very robust in use and have withstood several years of abuse.