The Pacific Nord 3.1192 is one of the most famous French steam locomotives. This fame is partly due to its splendid chocolate livery with yellow thread, characteristic of the Compagnie du Nord, but is mainly because of its high-speed capabilities. It was the result of improvements carried out by engineer André Chapelon to 4-6-2 engines in service from 1909 on the Paris-Orleans network. Chapelon applied a theory that was widely greeted with scepticism, carefully bringing together the principles of thermodynamics and fluid mechanics. He actually succeeded in doubling the power of the engines and halving their fuel consumption, without in any way altering their original specifications. It logged speeds of over 130 kph (81 mph), which was an absolute wonder in the 1930s! The northern French network naturally placed it at the head of all their fast trains. It soon acquired the name “Pacific Chapelon” throughout the world. The locomotive has been built in 1909. (Source Cité du Train)
