Cornish engine

engine

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June 24, 2026

Quick Summary

The Cornish engine, perfected by Richard Trevithick, was a significant advancement in steam engine technology during the Industrial Revolution. Unlike earlier, low-pressure engines, the Cornish engine utilized high-pressure steam, allowing for a smaller, more powerful, and more fuel-efficient design. This innovation was crucial for the tin and copper mining industries in Cornwall, where fuel economy was essential.12

Key features of the Cornish engine include:
* High-pressure steam: Trevithick pioneered the use of high-pressure steam, which was considered too dangerous by some engineers like James Watt.12
* Improved efficiency: The Cornish engine was twice as efficient as the Watt-type engine, leading to its widespread adoption.12
* Distinctive boiler design: Trevithick developed a large wrought-iron boiler with a single internal flue, which became known as the Cornish type.1

These engines were vital for pumping water out of mines and played a crucial role in the industrial development of the era.12

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Richard Trevithick
…throughout the world as the Cornish type. It was used in conjunction with the equally famous Cornish pumping engine, which Trevithick perfected with the aid of local engineers. The latter was twice as economic as the Watt type, which it rapidly replaced.
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…throughout the world as the Cornish type. It was used in conjunction with the equally famous Cornish pumping engine, which Trevithick perfected with the aid of local engineers. The latter was twice as economic as the Watt type, which it rapidly replaced.
Read More

history of technology
Steam engines
…which became universally known as Cornish engines; their distinctive characteristic was the cutoff of steam injection before the stroke was complete in order to allow the steam to do work by expanding. These engines were used all over the world for heavy pumping duties, often being shipped out and installed…
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…which became universally known as Cornish engines; their distinctive characteristic was the cutoff of steam injection before the stroke was complete in order to allow the steam to do work by expanding. These engines were used all over the world for heavy pumping duties, often being shipped out and installed…
Read More