Railway Modelling

Methods of power
Model railway engines are generally operated by low voltage direct current (DC) electricity supplied via the tracks, but there are exceptions, such as Märklin and Lionel Corporation, which use alternating current (AC). Modern Digital Command Control (DCC) systems use alternating current. Other locomotives, particularly large models, used steam. Steam or clockwork driven engines are still sought by collectors.
• Clockwork
Most early models for the toy market were powered by clockwork and controlled by levers on the locomotive. Although this made control crude the models were large and robust enough that grabbing the controls was practical. Various manufacturers introduced slowing and stopping tracks that could trigger levers on the locomotive and allow station stops.