2+C-C+2
"2+C-C+2" means there are two sets of axles under the unit. Within each of these sets, there is a guiding truck with two idler axles, and inboard of this, and hinged to it, is a truck with three powered axles. The GE Steam turbine-electric locomotives of 1939 were notable examples of this arrangement.
Read more about this topic: AAR Wheel Arrangement
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