The use of a third rail in rail transport modelling is a technique that was once applied, in order to facilitate easier wiring. == Early train sets == Pre-war train sets from makers such as Hornby were almost entirely O scale, either clockwork or electric, with the electric sets using a three rail system.
The use of a third rail in rail transport modelling is a technique that was once applied, in order to facilitate easier wiring. == Early train sets == Pre-war train sets from makers such as Hornby were almost entirely O scale, either clockwork or electric, with the electric sets using a three rail system.
Source: Wikipedia "Third rail (model rail)" · CC BY-SA 4.0
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