Steam up on the Backyard Railroad

From Popular Mechanics, August 1945



The Kings of the model railroad fraternity are the "live steam" enthusiasts who can fire up the boilers of their tiny scale model locomotives, whistle for a clear track and move out on the rails just as if they were operating on a full-sized railroad.



Smoke pours from the stack, steam pops the safety valve and cinders fly back in your eyes just like the real thing. A bucket of coal will keep one of the baby engines moving all day. Some are equipped with the engineer's seat on the tender and foot bars that project from the sides of the cab. Passengers are carried on seats placed on sturdy scale model flatcars.

These models are no toys. Built on a scale of 1/4 inch, 1/2 inch, 3/4 inch or one inch to the foot, they are working replicas of actual locomotives in all details except the number of boiler tubes. Instead of scores of tubes, one of the midget boilers may contain only a dozen to 20 tubes. Steam and water can't be scaled down with efficiency. Starting with cold water, it takes about eight minutes to raise steam in one of the engines. The average working pressure is 100 pounds per square inch.

Jackson is currently working on a typical freight and passenger station that will be complete down to 6000 shingles on the roof and a set of miniature telegraph instruments in the office. The spout of his water tank is operated by a standard set of pull chains.

The rolling stock of the "Colorado Central," in addition to an eight wheeler and tender, includes two gondolas, two flatcars and a caboose. The interior of the caboose is fitted with seats, a coal-burning stove, lavatory, oil lamps and overhead bunks. Its doors open, its windows operate and its hand brakes function.

Model railroad men insist that their miniature equipment must operate exactly as if it were full size, if practical at the small scales they use. Jackson is finishing the construction of a set of semaphore signals and, in keeping with the model railroaders' ideal, he is making each part in exact imitation of a real semaphore. The small red and green light lenses, for instance, are made from the glass of real railroad signals cut and ground to shape, even to the tiny concentric Fresnel rings on the inside surface of each lens.

Engineer Billy Jones of Southern Pacific's "Daylight" operates a full-sized locomotive at work and a one-third-sized duplicate at his Los Gatos, Calif., ranch as a hobby. Jones' model engine is of the 2-6-2 Prairie type and operates over 2000 feed of 18-inch gauge track. It's an oiler burner, 22 feet long, weighs 4-1/2 tons and has started 200,000 pounds of load on a level track. It develops 250 horsepower under 125 pounds working pressure. True to tradition, a gold plated spike was driven in the final tie of Jones' "Wild Cat Railroad" at the dedication ceremony of the system.

The largest rolling stock of all in the hands of railroad enthusiasts is the full-sized narrow gauge steamer, tender and passenger car operated by Ward Kimball over three-foot trackage on his San Gabriel, Calif., ranch. The engine was the pride of a Nevada railroad almost a century ago. Kimball and his friends reconditioned the engine and operate it on week ends. They call it the "Grizzly Flats R.R."

The smaller live steam models, however, from one inch to the foot and down are more versatile. They can operate for many scale miles per day over a backyard system and can pound along the right-of-way at scale speeds of 100 miles per hour. The sound effects that are made by a tiny live steamer are the same as the sounds that issue from a big transcontinental locomotive, right down to the rumbling over the switch points and clicking on the rails.