A 1927 replica of Tom Thumb, the first American-built steam locomotive
Tom Thumb was the first American-built steam locomotive to operate on a common-carrier railroad. It was designed and constructed by Peter Cooper in 1829 to convince owners of the newly formed Baltimore and Ohio Railroad (B&O) (now CSX) to use steam engines; it was not intended to enter revenue service. It is especially remembered as a participant in an impromptu race with a horse-drawn car, which the horse won after Tom Thumb suffered a mechanical failure. However, the demonstration was successful, and the railroad committed to the use of steam locomotion and held trials in the following year for a working engine. 11:
The first railroads were little more than tracks on roads; horses pulled wagons and carriages with their wheels modified to ride on the rails. Trains could not be moved by steam power until the steam engine could be mounted on wheels. The first steam locomotives were built in England, the birthplace of steam power, and the first locomotives in America were imported from England. Soon, however, Americans began to plan their own locomotives.
Tom Thumb was designed by Peter Cooper as a four-wheel locomotive with a vertical boiler and vertically mounted cylinders that drove the wheels on one of the axles. The "design" was characterized by a host of improvisations. The boiler tubes were made from rifle barrels 11 and a blower was mounted in the stack, driven by a belt to the powered axle. :12 The engine was fueled by anthracite coal.:
Cooper's interest in the railroad was by way of substantial real estate investment in what is now the Canton neighborhood of Baltimore. Success for the railroad was expected to increase the value of his holdings. 11:
Construction was carried out in the machine shop of George W. Johnson, where the 18-year-old James Millholland was apprenticed.Millholland would later become a prominent locomotive designer in his own right.
Testing was performed on the company's year old first main track line going southwest between Baltimore and Ellicott Mills (now Ellicott City, Maryland) which sits along the upper branch of the Patapsco River Valley which feeds the lower Patapsco which is the "Basin" (now called the Inner Harbor) and the Harbor and Port of Baltimore which flows southeast to the nearby Chesapeake Bay. Two tracks had been constructed, which led the owners of Stockton and Company, a local stagecoach passenger and freight service to challenge the revolutionary new locomotive to a race, and on August 28, 1830, the famous legendary race was held(but sources differ slightly on the date with variations including August 25 and September 28 ). The challenge accepted, Tom Thumb was easily able to pull away from the horse until the belt slipped off the blower pulley. Without the blower, the boiler did not draw adequately and the locomotive lost power, allowing the horse to pass and win the race. Nonetheless, it was realized that the locomotive offered superior performance.
Because Tom Thumb was not intended for revenue service, the locomotive was not preserved. Cooper and others associated with the railroad's early days left detailed descriptions, though, which enabled the general dimensions and appearance to be worked out. In 1892, a wooden model was constructed by Major Joseph Pangborn, a western newspaperman and publicist, who also had models made of many other early locomotives. [ citation needed ]In 1927 the B&O hosted a centennial exhibition near Baltimore, titled "Fair of the Iron Horse", and had a replica constructed for the exhibition. This replica followed Pangborn's model and therefore differed considerably from the original, being somewhat larger and heavier, and considerably taller (note that the dimensions given above are those of the replica). Also, instead of the blower in the stack, a much larger blower was mounted on the platform to provide a forced draft, and the support frame of the cylinder and guides was considerably different.
The replica remains on display at the B&O Railroad Museum. The museum lists the replica as "operational", and the locomotive makes special appearances each year.
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