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.
There is a limit to the amount of power you can get from a reasonably sized locomotive, even if the limit is pretty high. Long trains usually need more than one locomotive. A locomotive consist is a number of locomotives coupled together, all controlled from a single cab by a small crew.