Model Locomotive BUILT FROM JUNK Runs Back-yard Railway (Sep, 1933)

Model Locomotive BUILT FROM JUNK Runs Back-yard Railway

ALTHOUGH built from materials costing only $12.35, this model locomotive hauls 350 lb. on a back-yard railway patronized by all the children in the neighborhood. It is 4 ft. long and weighs 80 lb.

To drive the locomotive, an old washing wachine motor costing $3 was used. The speed, being 1,700 r.p.m., had to be reduced. The ideal way would be with worm gears, but in order to keep the expense down, the gears from the same discarded washing machine were used. This old washer, which cost 50 cents, furnished a set of plain spur gears, bevel gears, and pulleys, as well as shafting, bearings, and other parts. Three-speed reductions were made in this way.

The 5-in. drive wheels, pony truck wheels, and tender trucks were the only new castings made. The cab wheels and tender wheels were taken from an old sliding door hanger. The speed is 3-1/2 miles per hour. To aid in starting, the coupler has a built-in spring.

The rails are 3/8 in. square iron laid on wood ties, 1 by 1-1/2 by 10 in., soaked in creosote. The ties are placed 1-1/2 or 2 in. apart, and the rails are fastened to them with 1-in. finishing nails. Every other tie is all that is nailed, but even so, this would have been a tedious job without an electric drill. The curves are banked and there are the necessary expansion cracks, each connected with copper wires to complete the circuit.

The power is transmitted through a third-rail system. This had to be made with care so as to insure safety. The diagram shows the construction used. In wet or damp weather, the locomotive is never run.—C. D. F.

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