French Northern Railway No. 437 to 444

Jules Petiet, actually a successful chief engineer at the French company Nord, also implemented some unsuccessful ideas. One of these was to incorporate the features of the Crampton into a tank locomotive. The eight locomotives had a driving axle with its own cylinders at each end and three carrying axles in between.

Another special feature was the steam dryer, which Petiet also used on other locomotives. It was another cylinder that sat on top of the boiler and directed the smoke from the smokebox back into a curved chimney. The steam was passed through here and separated from water.

As was to be expected, these locomotives were unable to establish themselves, especially not in express service. As early as the 1870s they were usually found in front of passenger trains on branch lines. They were scrapped between 1878 and 1883.