Railway Modelling

Where the model is of an electric locomotive, it may be supplied by overhead lines, like the full-size locomotive. Before Digital Command Control became available, this was one way of controlling two trains separately on the same track. The electric-outline model would be supplied by the overhead wire and the other model (usually steam-outline) would be supplied by one of the running rails. The other running rail would act as a common return.
- Battery
Early electric trains ran on batteries because few homes in the late 19th century and early 20th century had electricity. Today, inexpensive train sets running on batteries are again common but regarded as toys and seldom used by hobbyists. Battery power is used by many garden railway and larger scale systems because of the difficulty in obtaining reliable power supply through the rails outdoors and because the high power consumption and thus current draw of large scale garden models is more easily and safely met with rechargeable batteries. Most large scale battery powered models use radio control.