North Western Railway locomotive, identified as "Pittsburgh Heavy tank engine for India". A locomotive of essentially American design with the boiler and cab modified to British requirements. Firebox 88-1/16" long, 49" wide, of copper with staybolts 1" diameter. Total 148 sq. ft. of heating surface in firebox, 1,942 sq. ft. in the tubes. Grate area 30 sq. ft. Four pairs of coupled driving wheels, 51" dia., with cast-steel centers. Trucks with wheels 37" dia. Cylinders 20"x26", steam ports 16"x15", exhaust port 16"x3". Steam pipes of copper; exhaust pipes, nozzles, slide valves, and main axle of gun metal. The duplex Worthington pump placed in front is for use in the excessively hot climate of India, where water becomes too hot in the tank for injector use. Eight 2-8-2T locomotives of this class known as TAA were built by Pittsburgh in 1900. Earlier in 1896 four similar but more British design locomotives were built by Neilson that were known as tbe TA class. "Railway and locomotive engineering : a practical journal of railway motive power and rolling stock" (1900s). Scan from the Internet Archive of Book Images. (Admin)