Working model roller coasters

Amazing working model roller coasters models built from 1995-2002. Building a working model roller coaster is an extremely complex process. Many things must come together to make a model roller coaster work properly. All of the following topics must be taken into account – layout, design, track, rails, cross ties, track support, wheels, cars, train dynamics, lift mechanisms, sprockets, chains, motors, brakes, magnets, tools, materials, adhesives, molds, and paints. Link.