The Austerity Engine is a saddle-tank engine.
The Railway Series
The Austerity Engine is an engine which the Fat Controller planned to acquire to assist Donald and Douglas with their branch line work. In order to assess the abilities of such an engine, he borrowed Wilbert from the Dean Forest Railway for a period in the early 1993. He told Wilbert that he knew where he could get another engine like him.
The Austerity is an Austerity 0-6-0ST. This type was designed by Hunslet for War Department use in 1943, continued to be built for WD and industrial use until 1964 by various companies. It is unknown which company built this particular Austerity or when it was built. Wilbert and Sixteen are other members of this class. Other members of this class were featured in Thomas and the U.K. Trip and the Down at the Station segments.