Engineering Wonders of the World
Volume I

196 ENGINEERING WONDERS OF THE WORLD. Fig. 5.—EXPRESS ENGINE, CALEDONIAN RAILWAY. Cylinders, 20A inches by 26 inches. Six-coupled wheels, 6 feet 6 inches diameter. Heating surface, 2,400 square feet. Working pressure, 200 lbs. Weight (without tender), 73 tons. Inside cylinders ; wheels outside frames. This type of engine works 300-400 ton trains between Carlisle and Glasgow at average speeds of over 50 miles an hour. Fig. 6.—MIXED TRAFFIC SIX-COUPLED BOGIE LOCOMOTIVE, LONDON AND NORTH-WESTERN RAILWAY. Cylinders, 19 inches by 26 inches. Driving wheels, 5 feet 3 inches. Heating surface, 1,984-8 square feet. Working pressure, 185 lbs. Weight, 63 tons. About 150 of these engines have been constructed, and are used for many classes of work. Fig. 7.—SIX-COUPLED EXPRESS LOCOMOTIVE, GREAT CENTRAL RAILWAY. Outside cylinders, 191 inches by 26 inches. Driving wheels, 6 feet 6 inches. Heating surface, 1,911 square feet. Working pressure, 180 lbs. Weight, 66* tons. Belpair© fire-box-..