Pointon, Ken (Author)
Pointon, Andre (Author)
This paper describes the process of designing, building, commissioning and testing a small full size operational Newcomen engine built over three years by the Auckland Steam Engine Society Inc. of New Zealand. This project was to celebrate the 2012 tercentenary of the first recorded Newcomen engine in the year of 1712. Designed for educational display purposes and the need to be disassembled for transport, the construction of the engine's main framework was of bolt-together steel and timber sections supporting the principal components. These consist of cast iron cylinder, coal fired boiler, main water tank, main and auxiliary water pumps, rocking beam, valve gear, auxiliary tanks and plumbing. The engine ran even though not fully completed from the start with only minor adjustments needed during the final completion stage when a waterwheel was added to the engine making it a returning engine. Subsequent tests and experiments have proved that the buoy float system commonly fitted to the first generation of Newcomen engines with limited boiler capacity will operate the engine in single cycle operation and that it is also a useful indication of boiler pressure for the engine operator. Other tests have shown that the cylinder temperature does not vary during the engine operating cycle. This project has proven that small Newcomen engines can be made to work successfully and suggest that more ongoing research into the design of the valve gear of the early engines is required in the future.
...MoreArticle John Hunter (2018) Newcomen-Type Pumping Engines in Collieries and Ironworks on the North Side of the Don Valley in the Rotherham Area of South Yorkshire in the Eighteenth Century. International Journal for the History of Engineering and Technology (pp. 1-36).
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