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 railway steam locomotive is a steam engine on wheels, the very earliest ones are just a large boiler driving pistons in exactly the same way as stationery engines in factories. It was much easier to lay railroad track than it was to build roads, especially before the use of the macadamised process.