Railway Herald
The first Fairlie locomotive, 'The Progress', was built in 1865 by Cross & Co. for the Neath and Brecon Railway. It was an 0-4-4-0 double engine appearing similar in design to FR double engines, except for having one firebox rather than two and only one dome. In practice the single firebox was found to be a flawed design as the draught from each set of cylinders worked against the other. The arrangement, which on the FR we are familiar with, a double boiler with twin fireboxes, was adopted for all double Fairlie locomotives that went into traffic. Seen here at the NRM York on 20th July 2012.
Podge
