... Before World War Two there were about 800 of these locomotives in service. This design lead to the development of all the modern day locomotives such as the diesel freight train and all the bullet trains. Richard Trevithick of England and Oliver Evans of the USA were the first men that understood the importance of high-pressure steam. Their 'right' ideas were higher pressure, higher speed, lighter parts, and wider expansion stroke. The first Trevithick high-pressure, double-acting steam engine worked a pump by a crossbeam in a Cornish mine in 1800. Later, Trevithick built the steam engine that is called This engine was a great success, worked well for a long time. It was a simple-acting and expansion engine; the steam pressure was 2,8-3,5 kg/cm² and let out the steam in a condenser. In 1801 Trevithich built a steam-car with an inside hearth boiler. It had a vertical cylinder and the piston ...

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