![]() ![]() The bolt is then put inside an aluminum tube, which is inserted into a larger aluminum tube fastened to the frame. The whole setup is then put on a long bolt, and fastened with nuts. The drive wheel is made from quarter inch circles connected together with thick nails. The idler is the same system, but without an arm, instead it has a metal axle fixed permanently into the frame. The purpose of this arm, as will be discussed in part 3, is for the suspension system. The purpose of the space between the two wheels is to guide the tracks, as will be shown in part 2. The wheels were fixed loosely onto the axle with metal washers. A piece of wood was used as the arm of each wheel, onto which wooden axles were attached. Using a two inch whole cutter, wholes were cut out of half inch thick pieces of wood. The first part of the track system consists of the road wheels (the ones carrying the weight), the drive wheel (the one powering the system), and the idler wheel (responsible for track tension and control).
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