2-8-8-0 "Consolidation Mallet" Type Locomotives

The AT&SF (Santa Fe) was the first to experiment with this wheel arrangement. They seemed to enjoy the creation of new locomotives by rebuilding smaller engines into bigger ones. They took two 2-8-0s (Consolidations) and rebuilt them into a 2-8-8-0 configuration. As a result, this wheel arrangement is sometimes called a "Consolidation Mallet". On the Great Northern these were sometimes called the "Bull Moose" type.