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The Locomotives of the Saint-Étienne & Lyon Railway

1997, HISTORICAL STUDIES IN CIVIL ENGINEERING

Abstract

During 1820s, Seguin brothers was a French firm well known for suspension bridges and steamboat navigation. In 1825, they started negotiations with French government for the construction of a railway line from the Saint-Etienne coal field to the Rhone Valley and The city of Lyon. During a long trip of 1825-26 in England and Scotland , they visited the famous first public railway of Stockton & Darlington and gathered much information about steam railway traction and locomotives as linked with railway line design. Their personal engineering and managerial background gave us a very good understanding of the British technological system for railways, and its tremendous potential for heavy transportation. Such understanding was not only a 'copy' by the way of buying materials , wagons, and locomotives, but also a critical reflection on the technical choices made by the British engineers. For example, they refused the common point of view of that time for the general design of a line, i.e., the primacy of fixed engines for inclined planes. This paper presents the development of locomotives of the Saint-Etinenne & Lyon railway (Le Chemin de fer entre Saint-Etienne et Lyon) form the viewpoint of its design, construction and first uses. Major points discussed include: 1) the two Stephenson's locomotives bought for this railway, 2) the first Seguin's French patent for the famous tubular boiler , 3) locomotive construction in Perrache, Lyon. This study highlights the originality of Marc Seguin's locomotives.