Ground ambulances are generally much less expensive, with an average emergency run coming in at $800 to $2,000, depending on the region and other factors, according to J.D. Fuiten, secretary of the American Ambulance Association. During an emergency, when the aircraft show up, there's usually no mention of money.
The traditional electric motor on a diesel-electric or electric locomotive is a DC motor. Internally, DC motors have two main components: the stator is the stationary outside part of a motor. The armature is the inner part which rotates.
The locomotive engine really just needs to apply a very large impulse to move the train, and then only needs to overcome friction and wind resistance to accelerate it. Think of it like your car-you start in first gear, and use all 200 ft/lbs of torque (or whatever) to get the car going about 10-15mph.