N2 Class 2-8-0

N2a class 2-8-0 3688 was in yard service as indicated by the footboards and fire hose on the tender.
This engine was converted to oil in 1952. Calgary September 3, 1953
Collection of Howard W. Ameling/Bud Laws Collection

MLW 10/1911 as N3 class 3888 rebuilt Angus 5/27. These locomotives were said to be "under boilered" in that the two "engines" could consume steam faster than the fireman could make it! At least on hand-fired coal burners working the main line with heavy tonnage. Note: Each set of cylinders, motion, rods etc. comprise a separate "engine" that could in fact operate independently in an emergency such as a rod failure.

Note: N3b and c sub-class engines 3891-3960 were built with an all-weather enclosed cab a.k.a. vestibule cab. A few oil-fired 3600's got the new cabs but, most remained open cab until the end.