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 problem of hybrid trains, however, is the same as that of hybrid cars: the batteries add weight. Admittedly, this is not quite such a hardship in locomotives. They need a certain amount of weight in order to keep a tight grip on the rails. But railways are supposed to carry people, not batteries, says Mr Hiller.