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May 19, 2015 · The last two centuries have seen a surge of innovation in railway propulsion technology. From the industrial revolution of the 19th century to the leaner, greener locomotives of tomorrow, Railway Technology plots a timeline through the past, present and future of locomotive development. Chris Lo May 19, 2015.
Efficiency was also important, as coal cost money, and having to frequently stop for water would negate any speed advantage over a horse-worked tramway. These calculations allowed the judges to determine the overall performance and economy of each locomotive.
Over time, freight locomotive size increased, and the overall number of axles increased accordingly; the leading bogie was usually a single axle, but a trailing truck was added to larger locomotives to support a larger firebox that could no longer fit between or above the driving wheels.
Oct 23, 2024 · Locomotives increased rapidly in size and power, but the essential principles remained the same as those established by the Stephensons in the early 1830s: horizontal cylinders mounted beneath a multitubular boiler with a firebox at the rear and a tender carrying supplies of water and fuel.
Aug 30, 2023 · By the mid-1830s, considerable improvements were made in locomotive design and performance. Engines with eight times the power of the Rocket and only marginally heavier were employed in the Manchester-Liverpool line.
The more efficient locomotives tested towards the end of the ‘steam era’ had overall thermal efficiencies of around 7 or 8 percent when working at optimum conditions; that is, the work done at the drawbar was 7 or 8 percent of the calorific value of the coal burned.
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Sep 24, 2019 · The locomotive had to be mounted on springs to make sure it weighed no more than six tons, including the water in the boiler. The engine had to operate between 45 and 60 psi but able to test at up to 150 psi.
