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.
A wheel on a locomotive might last at least five and probably ten years. Trucks could be used for 15 years before they are too worn; locomotives last 30 years, and often as much as 50! Trains are cheaper to run. One train does what 120 to 180 trucks might do.