
Matthew Murray's rack locomotive, the "Salamanca" built for the Middleton Railway (Leeds) was the first commercially successful steam locomotive, with a twin-cylinder locomotive light enough to not damage the cast iron tracks and simultaneously solved the problem of wheel slippage (adhesion) via using a driven cog wheel that engaged cast track teeth on one side of the rails- thus Salamanca was also the first commercial track locomotive. Trevithick later demonstrated a locomotive operating upon a piece of circular rail track in Bloomsbury, London, the "Catch Me Who Can," Trevithick never got beyond the experimental stages of steam locomotion in the main due to his engines being too heavy for the common cast-iron "plateway" track then in use. Trevithick's single-stroke locomotive had its piston rod action evened out by a large flywheel.

It carried 10 ton of ore and 70 men in 5 wagons, traveling 10 miles (16 km) in 4 hours and five minutes, averaging a speed of 3 mph (4 km/h).

Robert Trevithick created the world's first steam locomotive journey on 21 February 1804, when Trevithick's unnamed steam locomotive hauled a train along the tramway of the Penydarren ironworks, near Merthyr Tydfil in South Wales, United Kingdom. In 1784, Watt's employee William Murdoch produced a working model of a self-propelled steam carriage. In 1784, Watt patented a design for a steam locomotive. Boiler technology and construction in Watt's time allowed only for steam engines operating on the principle of low pressure boilers acting upon this pressure differential to a vacuum within a cylinder sealed by a moving piston, which caused piston to reciprocate within the cylinder, effecting a connected piston rod, which caused a lever to reciprocate and thus effect pumping via a bellows action (and relevant one-way flap-valves) or instead cause a crank to rotate continuously in one direction thus creating useful kinetic energy- transferred to factory, especially textile machinery, via belts.Īs time progressed, boiler design and construction improved markedly and Watt investigated the use of high-pressure steam acting directly upon a piston- creating possibly smaller engines, even one small enough to power a vehicle. James Watt's enormous improvement of Thomas Newcomen's reciprocating steam engine in 1769, lead to widespread adoption of Watt's steam pumps and stationary engines. Prior to steam locomotive and the Industrial Revolution, animal and human power had been engaged to haul carts in tramways or trackways in mines throughout Europe since at least 1556 as noted in Georgius Agricola's work "De re metallica". As well as being one of the very first steam locomotives. 1, one of the very first locomotives ever built.
