Electrical equipment of the Union Pacific steam-electric locomotive

L. K. Sillcox (The New York Air Brake Company, Watertown, N. Y.): The writer has read with great interest this general description of the control and power circuits of perhaps as novel a steam-powered locomotive as the world has yet seen. Although resistance and regenerative braking are not new, the particular arrangement and control of the resistance brake on the driving axles warrants the highest commendations. In the past these means have been used generally to develop effective retardation only in the lower speed ranges. In this locomotive, however, some degree of resistance braking is made available over the whole speed range up to 120 miles per hour.