In ancient days, a single large motor was used to drive multiple driving wheels through connecting rods but it is now standard practice to provide one (or occasionally two) traction motors driving each axle through a gear drive.
A single large motor was used to drive multiple driving wheels through connecting rods. This was in ancient days. It is now standard practice to provide one (or occasionally two) traction motors driving each axle through a gear drive. This is in ancient days.