This is a view of the bottom of the engine, looking from the front back. The first set of wheels (the "2") are 12V, the next two sets of 6 are each built with 4 smooth round Technic hubs and 2 round Model Team type Technic hubs. The final 6 wheels on the engine are 3 sets of 9V wheels. The engine body is attached to the wheels at two points - over each set of driver wheels. There is a pivot point between the final driver set and the 9V wheels, which simply float under the fire box and cab of the engine (not touching either). A magnetic coupler after these wheels connects the engine to the tender. Steve Barile took this picture so it is better than most of the rest - thanks Steve!
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