Why we still measure modern engines using 18th-century horse power
In short: The unit of measurement for engine power isn't a modern scientific standard; it is a clever marketing tool from the Industrial Revolution. This video explores how James Watt turned animal labor into a metric to sell his steam engines.
In the early 1780s, Scottish engineer James Watt developed a steam engine that significantly outperformed the older Newcomen model. To market his invention effectively, Watt needed a way to demonstrate its efficiency. He highlighted that his design consumed approximately 75% less fuel than its predecessor.
Watt chose to measure power in 'horsepower' to provide a relatable comparison for people accustomed to animal labor. By quantifying how much work an engine could do compared to a horse, he made the technological leap of the Industrial Revolution tangible and marketable.
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Sources
- Summary by Intellect · source: Why Engines are Commonly Measured in Horsepower
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