NBR 1877 Passenger Engine
LOCOMOTIVE FOR THE NORTH BRITISH RAILWAY.
We give this week a ... engraving of one of a type of passenger locomotives recently constructed from the designs of Mr. Drummond, the locomotive superintendent of the North British Railway, for working the fast passenger traffic on that line. As will be seen from our illustration the engine is of the inside cylinder type with a single pair of driving wheels, the cylinders being 17 in. in diameter with 2 ft. stroke, and the driving wheels 7 ft.in diameter, so that the tractive force which the engine is capable of exerting is 172 X 2/7 ~ = 82.57 lb. for each pound of effective pressure per square inch on the pistons.