Engineering Wonders of the World
Volume I

BRITISH LOCOMOTIVES. 195 Fig. 3.—“ ATLANTIC ” TYPE EXPRESS ENGINE, GREAT NORTHERN RAILWAY. Cylinders, 18| inches by 24 inches. Driving wheels, 6 feet 7| inches. Healing surface, 2,500 square feet. Working pres- sure, 175 lbs. These engines have large boilers with “ Wootten” or wide fire-boxes, carried on the frames to give room for a pair of trailing wheels below, and work heavy 350-ton trains on the Scottish and Leeds services at average speeds exceeding 50 miles an hour. The term “ Atlantic ” signifies a ten-wheeled type comprising a leading bogie, four-coupled driving wheels, and a pair of carrying wheels at the trailing end. It is due to the fact that the type was first used in America on the Atlantic Coast Railway. Mr. H. A. Ivatt, locomotive engineer of the Great Northern Railway, introduced the type into this country. Fig. 4 —FRENCH BUILT COMPOUND EXPRESS ENGINE, GREAT WESTERN RAILWAY.' Cylinders: high pressure, 13J inches by 25& inches ; low pressure, 22^ inches by 25^ inches. Coupled wheels, 6 feet 8| inches. Heating surface, 2,325 square feet. H orking pressure, 227 lbs. This engine is particularly interesting as being the first of the three French-designed and built engines running on the Great Western Railway. Except for a few details, “ La France ” reproduces the Du-Bousquet-De-Glehn express locomotives of the Northern Railway of France. She has been used on the non-stop trains between London and Plymouth. Observe the rod-work of the outside Walschaert valve gear. “ La France” and her two sisters were imported for the purpose of making comparative trials against standard English engines. In modem times there has been no other instance of French design being employed in locomotives for British lines.