Since the 2-8-2 wheel arrangement had now become the US standard for lighter freight trains, the USRA designed the Light Mikado as the standard type for this purpose. It is considered the first USRA design to enter service. With cylinders measuring 26 by 30 inches and drivers with a diameter of 63 inches, sufficient pulling power was available for the lighter freight trains and a top speed of around 65 mph was achieved. The largest order came from the Baltimore & Ohio, which used a total of 100 as class Q-3. The Q-3 No. 4500 was the first USRA locomotive ever and is one of nine surviving Light Mikados.