From a Roman toy to a global power revolution

Technology · Published 27 October 2026 Swipe more like this →

In short: The steam turbine is the backbone of modern energy, but its journey began as a mere curiosity. It took nearly two millennia to move from a decorative sphere spinning in a Roman palace to the high-efficiency engines that power our world today.

The earliest ancestor of the turbine was the aeolipile, a device proposed by Hero of Alexandria in the 1st century CE. While it demonstrated the principle of steam power by spinning a hollow sphere through curved tubes, it was essentially a toy. It produced no useful work, serving as a scientific curiosity rather than a practical machine. It wasn't until 1629 that another steam-driven machine appeared in Italy, using a jet of steam to impinge on blades to rotate a wheel via the impulse principle.

Progress stalled for centuries. In 1784, James Watt patented various turbine adaptations, but they were largely unsuccessful until after 1837. William Avery of the United States eventually built turbines for sawmills and cotton gins. However, these early models were plagued by high noise, difficult speed regulation, and constant repair needs.

Despite having efficiencies comparable to contemporary steam engines, they were eventually abandoned in favor of other technologies. The modern era began in the late 19th century. In 1884, British engineer Sir Charles Algernon Parsons revolutionized the field by developing the rotary engine. He introduced a multi-stage system that extracted thermal energy in small steps and a reaction-stage principle where pressure drops occurred in both stationary and moving blades. Simultaneously, Carl G.P. de Laval in Sweden was constructing small reaction turbines spinning at 40,000 revolutions per minute. While de Laval's high speeds were initially impractical for many uses, his work on single-stage impulse turbines and the subsequent developments by C.E.A. Rateau and Charles G. Curtis laid the foundation for the high-capacity marine and industrial turbines we use today.

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