232 U 1, express steam locomotive designed by Marc de Caso. Four 3-cylinder locomotives 232 R and four 4-cylinder compound locomotives 232 S were planned; in 1940, three 232 R and four 232 S were delivered, the fourth 232 R became the 232 U after the second world war, delivered with various improvements. The 232 R, S and U were used for express trains from Paris to Lille and Belgium in the post-war era until 1961, when these lines were electrified. Service weight including tender: 214 t, length including tender: 25.62 m, wheel diameter: 2 m, maximum speed: 160 km/h. This locomotive has an "artificial animation": every twenty minutes, the wheels are turned by a chain mechanism accompanied by sound and a fog machine.

Mulhouse, Cité du Train, 2006-06-02

tobias b köhler