Why were the 'Prairie' steam locomotives used by Great Western Railways so named ?

Historically, this name was originally given to a series of steam locomotives designed to work on routes through the Mid-West Prairies of the United States.  These locomotives adopted a distinctive 2-6-2 configuration according to the whyte notation. This means that they had two leading wheels, six driving wheels and two trailing wheels. The middle set of six driving wheels gave the locomotive a characteristic look.

Great Western Railways (GWR) adopted this wheel arrangement for some of their locomotives because it provided a good balance between power and flexibility. The leading and trailing wheels helped to guide the locomotive around curves, while the six driving wheels ensured that it had enough traction to haul heavy loads. This made the 'Prairie' locomotives well-suited for both freight and passenger services on the Great Western Railways network.