Five Alco locomotives no one wanted

Gray and white diesel locomotive with freight train

Five Alco locomotives no one wanted: In the annals of locomotive history, there are a great many success stories. The GP7, the U25B, and the SD40-2 spring to mind for many railfans. But among these successes, there are of course failures, models forgotten to time. This article highlights five locomotives from the famed manufacturer Alco […]

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Tools of railroading

A headlight glows in the distance beneath a signal bridge with two red lights across a position light signal next to another showing a vertical line of pale yellow lights.

Railroading tools Railroads are fixed-guideway systems for transporting goods or people. Its basis is the low friction, and hence high efficiency, of a hard wheel rolling on a hard surface. They are made up of many elements: people doing different jobs, and hardware for them to use. The jobs range from laborer to strategic planner. […]

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Model railroading adhesives and glues

A bottle of Bondene solvent cement

No matter what scale you’re modeling in or what era you prefer, there is no doubt that you’ll encounter the need to use an adhesive sooner than later. Whether it’s laying cork roadbed, building a structure, or applying detail parts, everyone needs a variety of adhesives for a variety of tasks. This list should help […]

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Blue flags

The side of a yellow and blue locomotive inside a maintenance facility. A blue metal sign hangs from the cab window, labeled in white with the words STOP Employees at Work

Blue flags protect workers. Here’s how they work. A major consideration in railroad operation is the maintenance that must be done on the rolling stock and track if freight and passengers are to be transported in a safe and timely manner. To maintain cars and locomotives, workers must get on, in between, and under them. […]

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Diesel engines: four strokes and two

Eight grimy diesel locomotive cylinders held upright in a yellow rack inside a maintenance building

What’s the difference between a four-stroke diesel engine and a two-stroke engine? It’s more than just a matter of numbers, as Vernon L. Smith explained in “Cycles and Cylinders,” in the May 1979 issue of Trains Magazine: A four-cycle engine requires four strokes of the piston, covering two revolutions of the crankshaft, to complete one […]

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Diesel-electric locomotives have streetcar roots

A red diesel locomotive leads a train of grain hopper cars through an series of curves in a tree-covered hill scape

It’s strange but true: Diesel-electric locomotives have streetcar roots. With diesel locomotives rapidly replacing steam locomotives in the years after World War II, it’s easy to imagine diesels as a natural evolution of the steam locomotive. The fact is, there was almost no transfer of technology. The melodious steam whistle was replaced by a blaring […]

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Railroad signals 101

Absolute signal

There is more to understanding railroad wayside signals than simply “green means go, red means stop.” To appreciate what the signals you see along the track are telling you, you first have to grasp a few basic concepts. Railroad traffic control boils down to three situations: trains running in the same direction on the same […]

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The people who work on trains

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The people who work on trains have a variety of jobs. A Norfolk Southern flagman inspects a train near Marion, Ohio.  Dale A. DeVene Jr. The people who work on trains have a variety of jobs. Each member of a train crew has a specific function. Since train crews do most of their work beyond […]

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Track classifications

track1

Track classifications are among the most basic — and essential — operating considerations in railroading, and an army of workers keep watch over the rails. You’ve seen them out there nearly every day in their hi-rail trucks, motoring quietly up and down the main and not-so-main lines of America. Perhaps you’ve waited for them to […]

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Are slugs locomotives?

slug1

Slugs What are slugs, what do they do You’re at trackside, eyeing an approaching CSX train. The roar of working diesels increases, but it’s oddly distant, given that the engines are so close. The lead unit grinds by, eerily silent but for the humming of its traction motors, followed by two others making all the […]

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Head-end power

A image of the nose of a blue and silver modern passenger locomotive

Head-end power: Dinner is about to arrive at table 7 in the Southwest Chief’s Superliner dining car. Outside, the late afternoon sun illuminates exhaust blasting skyward as the locomotives up front struggle to maintain speed up the more than 3% grade leading to the top of Raton Pass in New Mexico. Downstairs in the kitchen, […]

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Locomotives are the power of railroading

An image of the broadside of a black-painted steam locomotive trailing smoke and steam

Locomotives are the power of railroading and the industries’ most potent and popular symbols. The major types that have been used in North America are steam (now confined to museums, tourist lines, and the occasional excursion), diesel-electric (the standard of the industry), and straight electric (always a tiny minority). Steam locomotives burn coal, oil, or […]

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