The Steam Locomotive: The Engine That Built the Railways

The steam locomotive was the most visible symbol of the Industrial Revolution. Developed in the early nineteenth century, the steam locomotive made possible the railway, which in turn transformed the movement of goods and people and created the modern industrial economy. From Trevithick’s 1804 Penydarren engine to Gresley’s 1930s A4 Pacifics, the locomotive is also a record of what metallurgists and boiler-makers could do, decade by decade, to squeeze more power from the same fuel.

The Origins of the Locomotive

The idea of a self-propelled vehicle powered by steam goes back to the late eighteenth century, when several inventors, including Nicolas-Joseph Cugnot in France and William Murdoch in Britain, experimented with steam-powered road vehicles. None of these early attempts was successful, and the steam-powered road vehicle would have to wait for the development of the internal combustion engine in the late nineteenth century.

The steam locomotive, designed to run on rails, was a more practical proposition. Rails had been used in coal mines for centuries to reduce the friction of moving coal wagons, and several engineers in the early nineteenth century realized that a steam engine running on rails could move much greater loads than horses could.

The first person to demonstrate a working steam locomotive was the Cornish engineer Richard Trevithick. In 1804, Trevithick built a full-size locomotive that hauled a train of wagons along a tramway in Merthyr Tydfil in Wales. The locomotive successfully hauled ten tons of iron, seventy passengers, and the locomotive’s own weight along a distance of about nine miles. The run demonstrated the feasibility of the steam locomotive, but the rails of the time were too light to support the heavy engine, and Trevithick’s locomotive did not enter regular service.

Early Locomotive Development

Trevithick continued to experiment with steam locomotives, but he lacked the financial resources to develop them commercially. The first railway to use steam traction in regular service was the Middleton Railway near Leeds, which used a steam locomotive designed by John Blenkinsop from 1812. Blenkinsop’s locomotive used a rack-and-pinion drive, since the existing cast-iron rails were not strong enough to support the adhesion of a smooth-wheeled locomotive.

Several other early locomotives were built in the following years, including the locomotives of William Hedley at Wylam, which used smooth wheels and adhesion. The most important early locomotives, however, were the Killingworth locomotives designed by George Stephenson in the 1810s. Stephenson’s locomotives, including the famous Locomotion No. 1, were used on the Stockton and Darlington Railway when it opened in 1825, and they demonstrated that the steam locomotive could be a practical and economical form of traction.

The Rocket and the Rainhill Trials

The development of the steam locomotive was decisively shaped by the Rainhill Trials of 1829, a public competition organized to choose the locomotive for the new Liverpool and Manchester Railway. The trials, held on a level stretch of track at Rainhill, near Liverpool, attracted entries from several leading engineers.

The winner was the Rocket, designed by Robert Stephenson, the son of George Stephenson, working in collaboration with his father and the engineer Henry Booth. The Rocket’s main innovations included a multi-tubular boiler, which provided a much greater heating surface than the earlier designs, and a blast pipe that exhausted the used steam up the chimney, creating a draft that improved the combustion of the fire. These features, together with the inclined cylinders that drove the wheels directly, made the Rocket the fastest and most efficient locomotive of its time, capable of speeds of nearly 30 miles per hour.

The success of the Rocket established the basic form of the steam locomotive for the next century. The multi-tubular boiler and the blast pipe became standard features, and the principles embodied in the Rocket were refined in later designs by Stephenson, by his rivals at firms like Bury, and by the great locomotive builders of the late nineteenth century.

The Spread of the Locomotive

The success of the Liverpool and Manchester Railway, which opened in 1830, sparked a railway-building boom in Britain and around the world. The network of British railways grew from a few hundred miles in 1830 to several thousand miles by 1840, and to more than 20,000 miles by 1870. Railways were built in France, Germany, the United States, Russia, India, and Japan, and the global network grew rapidly in the second half of the nineteenth century.

The development of the locomotive kept pace with the expansion of the railway. Early locomotives were small and weak, often weighing only a few tons and capable of pulling only a few wagons. By the mid-nineteenth century, locomotives of 30 or 40 tons were common, and by the 1870s, locomotives of 60 or 70 tons were hauling long trains of heavy wagons at high speeds. The article on George Stephenson describes the development of the early locomotive industry in more detail.

The Great Locomotive Builders

The late nineteenth century was the golden age of the steam locomotive. Firms like Stephenson’s in the north of England, the Midland Railway’s works at Derby, the Great Western Railway’s works at Swindon under Daniel Gooch and later George Churchward, and the London and North Western Railway’s works at Crewe built increasingly large and powerful locomotives. The most famous designers of the period, including George Churchward, Gresley of the LNER, and Oliver Bulleid, pushed the steam locomotive to its technical limits.

In the United States, the Pennsylvania Railroad, the New York Central, and other great railroads developed their own distinctive locomotive designs, including the famous 4-4-0 “American” type and the huge articulated locomotives used on the prairies. The American locomotive industry, with its emphasis on standardization and mass production, was closely connected to the broader development of the American Industrial Revolution.

The Effects of the Locomotive

The steam locomotive transformed transportation in ways that are difficult to exaggerate. Before the railway, the cost of moving goods overland was prohibitive, and most goods traveled short distances by road or by water. The railway reduced the cost of land transport by an order of magnitude, and it made it possible to move large quantities of bulk goods, including coal, iron, and grain, over long distances. The article on the railroad revolution describes the broader effects of the railway.

The railway also transformed the experience of travel. Journeys that had taken days by coach could now be made in hours, and the railway created the first mass market for passenger transport. The railways played a major role in the growth of the new industrial cities, since they made it possible for workers to commute from the suburbs and for goods to be brought into the cities from distant suppliers. The article on urbanization and the growth of cities describes these effects.

The railway was also a major customer of the iron and coal industries. The construction of the railway network required enormous quantities of iron for rails, bridges, and locomotives, and large quantities of coal to power the locomotives. The railway boom of the 1830s and 1840s was therefore a major stimulus to the iron and coal industries, and it helped to ensure that the demand for these products remained strong even when other industries were in temporary decline.

The Decline of Steam

The steam locomotive remained the dominant form of rail traction for nearly 150 years, but it was eventually displaced by the diesel and electric locomotives that began to be introduced in the mid-twentieth century. The last major railway to operate steam locomotives in regular service, Chinese Railways, did not completely phase out steam until the 1980s, and a few steam railways continue to operate as tourist attractions.

The decline of the steam locomotive was due to a combination of factors. Diesel and electric locomotives were more efficient, cleaner, and easier to operate than steam locomotives, especially in the harsh conditions of modern railways. The labor cost of operating a steam locomotive, with its need for a driver, a fireman, and a great deal of manual labor to keep the engine running, was particularly high. The steam locomotive, in other words, was a victim of its own success, since the very efficiency and durability of the early designs made it possible to keep them in service long after more modern technologies had become available.

Despite this, the steam locomotive remains one of the iconic symbols of the Industrial Revolution, and its influence on the development of modern technology is hard to overstate. The engineering principles developed for the steam locomotive, from the multi-tubular boiler to the centrifugal governor, became standard features of many other machines, and the railway itself was the first example of a large, integrated technological system.

What It Teaches Us

The unresolved question about the steam locomotive is not whether it worked, but how to weigh its social costs against its economic benefits. The standard economic-history answer, articulated by Robert Fogel in Railroads and American Economic Growth (1964), is that the railway’s contribution to 19th-century growth was much smaller than contemporaries believed — that the canal and the turnpike could have done most of what the railway did, only more slowly. Fogel’s “social savings” estimate for the United States in 1890 was around 4.7 percent of national income, far below the figure implied by mid-Victorian railway boosters. The cultural-history answer, associated with Wolfgang Schivelbusch in The Railway Journey (1977), is that the railway changed the experience of time and space in ways that economic accounting cannot capture: standard time, the standardization of clocks, the separation of work and home, and the birth of the train-window view of the landscape. The two views are not in fact in conflict, but historians still argue about which dimension matters more for understanding the modern world.

Selected Sources

O. S. Nock, The British Steam Railway Locomotive, 1825-1925 (1951).
Jack Simmons, The Victorian Railway (1991).
E. L. Ahrons, The British Steam Railway Locomotive, 1825-1925 (1927).
Anthony Burton, The Locomotive Pioneers: A Comparative Analysis of the Work of Trevithick, Blenkinsop, Hedley, Stephenson and Others (1975).