Polzunov steam engine, 18th century

Polzunov steam engine, 18th century

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Credit: SPUTNIK/SCIENCE PHOTO LIBRARY

Caption: Polzunov steam engine. Model of the steam engine developed in the 18th century by Russian inventor Ivan Polzunov (1728-1766). This two-cylinder design was the first of its kind in the world. His first engine, built in 1763, generated a small but useful 1.2 kW (kilowatts) power, but two years later he designed an engine of 24 kW to power air blowers in the steel industry. Polzunov died at the age of 37, just three days before his new engine was finished. This photograph is from 'The Life and Works of the First Russian Heat Engineer Ivan Polzunov'.

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