<kuid:45588:5564> Baltimore & Ohio T-3a 4-8-2 5564

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In the early 1940's, B&O decided that their Q-4 Mikes were not wheeling freight across the midwest as efficiently as desired. Rebuilding four Q-4's with 70-inch drivers gave them added speed. Deciding they could do a bit better, B&O salvaged the boilers of retired Mikes and Pacifics to create 40 seemingly small-boilered T-3 class Mountains. They were classes Class T-3 (5555-5563), T-3a (5564), T-3b (5565-5584), and T-3c (5585-5594). A few engines received extra-long tenders and were re-classed T-3t. They pulled both fast freight and passenger trains with ease west of Pittsburgh and east of Chicago. During the first World War, the United States government put the nation's railroads under the control of a government agency: the USRA (United States Railroad Administration). The lasting legacy of the USRA was a group of standard locomotive designs, which were used by railroads across the country. The locomotives were designed to use a minimum of materials to conserve vital materials for the war effort. To serve as many roles as possible, the USRA created a set of 12 standard steam loco designs.
The first to be delivered was Baltimore & Ohio 4500, a USRA light 2-8-2. This engine is currently on display at the B&O Railway Museum in Baltimore, Maryland. The USRA engines came very late: even 4500 served for only a few months before the war ended; many USRA engines were not delivered until after the war.
Due to a focus on freight operations in USRA locomotive allocations, relatively few of the USRA passenger engines were built. There were only 47 of these light 4-8-2s built under the USRA, which made it the second most common USRA passenger engine (after the 81 light 4-6-2s). However, the design was modified and copied often following the end of the war. Many roads ordered similar 4-8-2s before and after the war, so this model can easily be a stand in for many 4-8-2 types around North America.

B&O T-3 4-8-2 (all subclasses)
Builder: Baltimore & Ohio (Mt. Clare Shops, Baltimore, MD), 1942-48
Drivers: 70 inch
Cylinders: 27 by 32 inch
Weight: 375,000 pounds
Tractive Effort: 65,100 pounds