Tri Bo arrangement was made so that axle spacing could be increased to give an acceptable spacing for bridge loading within the Queensland Railways mineral traffic area. A study of possible Tri Bo bogie arrangements around the world indicated that a number of possibilities existed such as flexi-coil suspensions, heavy duty rollers and pendulum arrangements. All of these had been used and appeared to be quite satisfactory. The length of locomotive also had to be increased from 17 metres to 19 metres to allow the actual spacing and bridge loading requirements to be met. At the same time the rollingstock diagram was increased up to the maximum allowable limit that had become necessary to accommodate the container traffic which was moving up and down the coast. The corners of these containers lay slightly outside the existing rollingstock diagram and bridge bracing etc. had been altered to accommodate this out of gauge loading situation. Hence an entirely new locomotive diagram was generated in terms of overhaul length, the area in the top corners of the diagram and the axle arrangement. This was a radically new locomotive.
Heavy haul 25 kV electric locomotive
Schwere 25 kV-Gueterzuglokomotive fuer den Mehrlokomotivenbetrieb von Massenguetern
1987
4 Seiten
Conference paper
English
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