What about the Fell locomotives?
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Stage 3 involves the operation of the Fell-worked incline between Summit and Cross Creek. This operation was typified by trains operated with multiple Fell locomotives, placed at various positions throughout the train.
At least two Fell locomotives will be required, which will necessitate the design and construction of new items. The design of the Fell locomotives must be faithful to the original design but must also meet modern safety and certification requirements. The design and construction of new locomotives is a considerable project in its own right.
However, conventional locomotives operated the former route from Upper Hutt to Summit, and there is no requirement for Fell locomotives for the initial stages of the railway.