Mallet locomotiveA Mallet locomotive is a type of compoundarticulatedsteam locomotive, invented by the Swiss engineer Anatole Mallet (1837–1919). The front of the locomotive is articulated on a bogie. The compound steam system fed steam at boiler pressure to high-pressure cylinders driving the rear set of driving wheels (rigidly connected to the boiler).
Vauclain compoundThe Vauclain compound was a type of compound steam locomotive that was briefly popular from the early 1890s to the mid-1900s. Developed by the Baldwin Locomotive Works, it featured two pistons moving in parallel, driving a common crosshead and controlled by a common valve gear using a single, complex piston valve.
Compound steam engineA compound steam engine unit is a type of steam engine where steam is expanded in two or more stages. A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure (HP) cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger-volume low-pressure (LP) cylinders. Multiple-expansion engines employ additional cylinders, of progressively lower pressure, to extract further energy from the steam.
Steam locomotiveRailway locomotive powered by a steam engineLNER Class A4 4468 Mallard is officially the fastest steam locomotive, reaching 126 mph (203 km/h) on 3 July 1938.JŽ 06-018 steam locomotive, in Ljubljana, SloveniaLNER Class A3 4472 Flying Scotsman was the first steam locomotive to officially reach 100 mph (160 km/h), on 30 November 1934.Union Pacific Big Boy 4014 is the largest operating steam locomotive in the world.41 018 climbing the Schiefe Ebene with 01 1066 as pusher locomotive (video 34.4 MB)A steam locomotive, also known as an iron horse, is a type of locomotive that provides the force to move itself and other vehicles by means of the expansion of steam.
Steam engineA steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be transformed by a connecting rod and crank into rotational force for work.
André ChapelonAndré Chapelon (26 October 1892 – 22 July 1978) was a French mechanical engineer and designer of advanced steam locomotives. A graduate engineer of Ecole Centrale Paris, he was one of very few locomotive designers who brought a rigorous scientific method to their design, and he sought to apply up-to-date theories and knowledge in subjects such as thermodynamics, and gas and fluid flow.
Livio Dante PortaLivio Dante Porta (21 March 1922 – 10 June 2003) was an Argentinesteam locomotive engineer. He is particularly remembered for his innovative modifications to existing locomotive systems in order to obtain better performance and energy efficiency, and reduced pollution. He developed the Kylpor and Lempor exhaust systems. The Lemprex ejector was under development at the time of his death.
4-8-0Under the Whyte notation for the classification of steam locomotives, 4-8-0 represents the wheel arrangement of four leading wheels on two axles, usually in a leading truck or bogie, eight powered and coupled driving wheels on four axles and no trailing wheels. In North America and in some other countries the type was usually known as the Twelve-wheeler.Walter Mackersie SmithWalter Mackersie Smith (1842–1906) was a British engineer who made an important contribution to the development of the compound steam locomotive. His middle name has sometimes been mis-spelt Mackenzie. He was born at Ferry-Port on Craig (now Tayport), Fife.
Samuel Waite JohnsonSamuel Waite Johnson (14 October 1831 – 14 January 1912) was an English railway engineer, and was Chief Mechanical Engineer (CME) of the Midland Railway from 1873 to 1903. He was born in Bramley, Yorkshire and educated at Leeds Grammar School. CareerJohnson learned to become an engineer at the locomotive builders E.B.Wilson and Company. In 1859 Johnson became Acting Locomotive Superintendent at the Manchester, Sheffield and Lincolnshire Railway.
Norfolk and Western RailwayAn N&W magazine ad titled "Land of Plenty" with the railroad's system map, 1948The Norfolk and Western Railway (reporting markNW), commonly called the N&W, was a US class I railroad, formed by more than 200 railroad mergers between 1838 and 1982. It was headquartered in Roanoke, Virginia, for most of its existence. Its motto was "Precision Transportation"; it had a variety of nicknames, including "King Coal" and "British Railway of America".Power-to-weight ratioPower-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of the actual performance of any engine or power source.*As an Amazon Associate I earn from qualifying purchases.