All About Engines

263 ffl Fig. 148.—Wootten firebox The Locomotive British Railway Companies a firebox (Fig. 147), invented by the Belgian engineer, Belpaire, is adopted. The outer casing has a flat top, and the crown of the firebox is parallel to and connected with it by stays similar to those used at the sides. In the diagram most of the stays are indicated only by their centre lines. Another form, tried to some extent in Great Britain, but much more frequently used in the United States, is the Wootten firebox, shown in Fig. 148, in which the side stays are shown only by centre lines and only a few of the tubes have been drawn. It is more than 7 feet—and the frame of the engine must be so designed as to enable the firebox to fall well behind the rear driving wheels. The original object was to permit inferior fuel to be used. Generally, American and Canadian engines are larger and more powerful than British, and have exceptionally large fireboxes. very wide at the base—sometimes