A study was made of 526 advanced coal-fired locomotive concepts of which 182 used gas turbine engines. This paper summarizes the results of the gas turbine portion of the study. Fifteen forms of coal including coal derived liquids, 15 different combustors, and five types of gas turbine engines were investigated. The principal means of comparing the different engines is by their life-cycle costs. The reason for this approach is that the greatest attraction of coal-fired locomotives is their low operating costs relative to that of Diesel-electric locomotives now in use. Many of the coal-fired locomotives have half the life-cycle costs of comparable Diesel-electrics. Although the analysis was made for conditions in the United States, the results are applicable to other countries.

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