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Steam engine, machine using steam power to perform mechanical work through the agency of heat. In a steam engine, hot steam, usually supplied by a boiler, expands under pressure, and part of the heat energy is converted into work. Learn more about steam engines in this article.
A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be transformed by a connecting rod and crank into rotational force for work.
Steam engines powered all early locomotives, steam boats and factories -- they fueled the Industrial Revolution. Learn how the steam engine produces power!
What is a steam engine? A steam engine is a machine that burns coal to release the heat energy it contains—so it's an example of what we call a heat engine. It's a bit like a giant kettle sitting on top of a coal fire. The heat from the fire boils the water in the kettle and turns it into steam.
In 1712, Thomas Newcomen's atmospheric engine became the first commercially successful engine using the principle of the piston and cylinder, which was the fundamental type of steam engine used until the early 20th century. The steam engine was used to pump water out of coal mines.
The great engineer Isambard Kingdom Brunel (1806-1859) used a steam engine to power his giant ships the SS Great Western (1838), the innovative propellor-driven SS Great Britain (1843), and the SS Great Eastern, the largest ship in the world at 692 feet (211 m) long and completed in 1858.
The steam engine developed by the Scotsman James Watt (1736-1819) from 1769 was much more efficient in terms of power and fuel consumption than earlier models, and it significantly increased the possible...