Atlantic and Pacific Engines 71 



could be done, and he built three distinct 

 types; these were the fine inside cylindered 

 ' singles ", the four-coupled class which 

 though good engines were never intended 

 for first class work; and finally the third 

 type, which we are about to consider. 



This first " Atlantic " in Britain is note- 

 worthy in many respects, so we will take 

 particular notice of its leading dimensions. 

 Outside cylinders, 1 8^x24, were employed, 

 and they were placed in a slightly inclined 

 position. They drove on to the second 

 pair of coupled wheels. This meant a 

 very long connecting rod, having a length 

 of 10 feet between the centres. The 

 coupled wheels had a diameter of 6 feet 

 7^ inches. 



The boiler was a decided novelty on the 

 Great Northern, being 14 feet 8| inches long, 

 with a diameter of 4 feet 8 inches. The 

 engine weighed 58 tons without its tender. 

 Unique amongst Great Northern loco- 

 motives of that day it was given a name 

 1 Henry Oakley ", that of a popular general 

 manager. 



